WO2016013120A1 - Storage management system - Google Patents

Abstract

Provided is a storage management system for managing a file storage system providing a plurality of storage layers. The storage management system keeps I/O history information indicating an I/O history with respect to each of a plurality of files located in the file storage system. The storage management system determines a relocation rule for the plurality of files in each of a plurality of past days using the I/O history information, estimates a response time for each day assuming a file location in accordance with the relocation rule for each day, and displays a transition of an estimated response time over a plurality of days on the input/output device.

Description

Storage management system

The present invention relates to storage management.

As a background art in this technical field, there is International Publication No. 2013/098960 (Patent Document 1). In this publication, “a computer system according to an embodiment is assigned a plurality of real file systems that belong to a plurality of tiers to which a plurality of volumes with different access performance provided by a storage system are assigned, and a plurality of real files. The virtual storage system manages a virtual file system that virtualizes the system, and controls the rearrangement of files in the virtual file system, and the storage device stores file usage status information indicating the usage status of a plurality of files in the virtual file system. The storage device stores storage usage status information indicating the usage status of the storage system, and the processor uses the file usage status information and the storage usage status information to determine the characteristics of the file and the evaluation values of each of the plurality of tiers. Create control information to associate, the processor is virtual Based on the characteristics and the control information of the first file in § yl systems, it has been described to "determine the respective evaluation values of the relocation destination tier candidates in the first file (see Abstract).

International Publication No. 2013/098960

As an example in Patent Document 1, the relocation destination is determined only by the number of days elapsed from the last I / O date. In this method, there is a case where a file having periodicity in I / O may be relocated to a low-speed secondary file storage apparatus even though there may be I / O again. When I / O occurs in a file rearranged in the secondary file storage device, the response time becomes long, and the response time of the entire directory deteriorates.

Therefore, a technology that can assist the storage administrator in predicting the response time when the relocation rule is applied is desired.

A typical example of the present invention is a storage management system that manages a file storage system that provides a plurality of storage tiers, and includes a processor, a memory, and an input / output device, and the memory includes the file The I / O history information indicating the I / O history for each of the plurality of files arranged in the storage system is held, and the processor sets the relocation rules of the plurality of files for each day of the past plurality of days. Determined using the I / O history information, assuming a file placement according to the relocation rules of each day, estimating the response time of each day, and changing the estimated response time of the plurality of days Displayed on the input / output device.

According to one aspect of the present invention, it is possible to assist the storage administrator in predicting the response time when the relocation rule is applied.

2 shows a configuration example of a computer system of the present embodiment. The example of a structure of the management server is shown. The structural example of a primary file storage apparatus is shown. The structural example of a secondary file storage apparatus is shown. An example of a rearrangement condition designation image is shown. The structural example of the file management information table which a primary file storage apparatus manages is shown. The structural example of the rearrangement condition table which the rearrangement condition change program of a management server manages is shown. The structural example of the file I / O history information table which a primary file storage apparatus manages is shown. The structural example of an estimated I / O number calculation result table is shown. The structural example of a file size calculation result table is shown. The structural example of the rearrangement rule calculation result table is shown. The example of a structure of the estimated response time calculation result table is shown. The flow of file I / O history information collection processing is shown. The flow of a rearrangement condition designation image display process is shown. The flow of an estimated I / O number calculation process is shown. The flow of the file size calculation process is shown. The flow of a rearrangement rule calculation process is shown. The flow of past placement destination actual response time calculation processing is shown. The flow of a relocation destination estimation response time calculation process is shown. The flow of relocation condition registration processing is shown. The flow of the file rearrangement process in the file storage apparatus is shown. The flow of file I / O history information management processing is shown. The flow of I / O response processing by the primary file storage device 4 is shown.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that this embodiment is merely an example for realizing the present invention, and does not limit the technical scope of the present invention. In each figure, the same reference numerals are given to common configurations.

In the following description, the information of the present invention will be described using expressions such as “aaa table”, “aaa list”, “aaaDB”, “aaa queue”, etc., but these information includes tables, lists, DBs, queues, etc. It may be expressed other than the data structure. Therefore, “aaa table”, “aaa list”, “aaaDB”, “aaa queue”, etc. may be referred to as “aaa information” to indicate that they are not dependent on the data structure.

Furthermore, in describing the contents of each information, the expressions “identification information”, “identifier”, “name”, “name”, and “ID” are used, but these can be replaced with each other.

In the following description, there is a case where “program” is used as the subject. However, since the program performs processing determined by being executed by the processor using the memory and the communication port (communication control device), the processor is used as the subject. The explanation may be as follows. Further, the processing disclosed with the program as the subject may be processing performed by a computer such as a management server or an information processing apparatus. Further, part or all of the program may be realized by dedicated hardware.

Further, various programs may be installed in each computer by a program distribution server or a computer-readable non-transitory storage medium. In this case, the program distribution server includes a CPU and storage resources, and the storage resources further store a distribution program and a program to be distributed. When the processor executes the distribution program, the processor of the program distribution server distributes the distribution target program to other computers.

Hereinafter, a set of one or more computers that manage the information processing system and display the display information of the present invention may be referred to as a management system. When the management computer displays the display information, the management computer is a management system. A combination of a management computer and a display computer is also a management system. In addition, in order to increase the speed and reliability of the management process, a plurality of computers may realize processing equivalent to that of the management computer. In this case, the plurality of computers (if the display computer performs the display, display (Including computers) is the management system.

As examples of input / output devices of the management system, a display, a keyboard, and a pointer device are conceivable, but other devices may be used. Also, as an alternative to the input / output device, a serial interface or an Ethernet interface is used as the input / output device, a display computer having a display or keyboard or pointer device is connected to the interface, and the display information is transmitted to the display computer. By receiving the input information from the display computer, the input and display on the input / output device may be substituted by displaying on the display computer or receiving the input.

This embodiment relates to management of file relocation in a file storage system. With the recent increase in file data, the purchase cost of file storage systems for storing files is increasing.

The file storage system according to the present embodiment provides a hierarchical file storage environment including a plurality of storage tiers having different response times. The storage system provides a hierarchical file storage environment by one or a plurality of storage devices. In one example, the hierarchical file storage environment includes, for example, a high-speed / expensive file storage device and a low-speed / expensive file storage device. Different storage tiers may be constituted by different storage devices in one file storage apparatus. The number of hierarchies is not limited.

The management system according to the present embodiment determines each rearrangement rule for a plurality of past days under the rearrangement condition input by the storage administrator, and estimates a response time for a plurality of days when the rearrangement rule is applied. The management system displays the transition of response times for multiple days. Thereby, the storage administrator can predict the transition of the future response time in the rearrangement rule, and can confirm the validity of the designated rearrangement condition.

Relocation rule indicates the relocation destination of each file. The multiple days are, for example, consecutive business days that constitute a period. The relocation condition is a condition defined by a storage administrator as a precondition for relocating a file in a hierarchical file storage environment. Relocation rules are defined within a range that satisfies the relocation conditions. The response time is an average response time expected for I / O from the host. I / O is a write request or read request from the host.

The management system according to the present embodiment estimates the presence / absence of I / O of each file on a specific date based on the history of I / O interval days of each file, and determines a file relocation rule based on the estimation result To do.

The management system executes file relocation according to the determined relocation rule on a specific date. For example, the management system determines a rearrangement rule every business day, and executes file rearrangement according to the rearrangement rule. In response to a predetermined cause, the management system may determine a rearrangement rule under a rearrangement condition specified in advance, and execute file rearrangement according to the rearrangement rule. The predetermined cause is, for example, elapse of a predetermined time (predetermined day), an instruction from a storage administrator, access to a file in a predetermined storage tier, and the like. The file relocation may be executed by the file storage instead of the management system.

The relocation rules of this embodiment improve the response time of the entire file while reducing the amount of use of high-speed and expensive storage resources. In the present disclosure, I / O to a file is also referred to as access to the file.

In a hierarchical file storage environment, it is generally desirable to shorten the response time of the entire directory. The management system formulates a relocation rule that takes into consideration the relocation conditions set by the storage administrator, file I / O periodicity, and the number of I / Os, and executes file relocation according to the relocation rule. Thereby, the response time of the whole directory can be shortened.

In one embodiment, the management system analyzes the periodicity of I / O from the I / O history of each file, and estimates the number of I / Os of the file on a specific day. Next, the management system groups the files according to the number of days elapsed from the last I / O date to the specific date, and calculates the sum of the estimated number of I / Os for each file group having the same number of days elapsed.

Next, the management system calculates a value obtained by dividing the total number of I / Os of each file group by the total file size of each file group. The management system creates a relocation rule that arranges the file group in the primary file storage device in descending order of the value. As a result, when the entire directory is viewed, the number of I / Os for the file group existing in the primary file storage device is increased, and the number of I / Os for the file group existing in the secondary file storage device is reduced. Response time decreases.

The management system executes, for example, the relocation rule determination and the file relocation according to the relocation rule every business day. The management system may execute relocation rule determination and file relocation according to the relocation rule on condition that the file of the predetermined storage tier is accessed.

In one embodiment, the management system accepts a new relocation condition designation from the storage administrator. The management system determines a rearrangement rule in the rearrangement condition. The management system displays information for assisting the storage administrator to specify a new relocation condition.

The past trend and the future trend of the response time of the entire directory are considered to have a correlation. The management system, the transition of the estimated response time in the file arrangement when applying the relocation rule newly created by the management system in the past predetermined period, the transition of the response time in the actual file arrangement of the predetermined period, Is displayed. Thereby, the storage administrator can determine the usefulness of the new relocation condition.

The management system displays the average value and the maximum value of the estimated response time of the entire directory in the file allocation to which the above relocation rule is applied. Thereby, the storage administrator can confirm the validity of the designated relocation condition and relocation rule.

Hereinafter, the present embodiment will be specifically described with reference to the drawings. FIG. 1 shows a configuration example of a computer system of this embodiment. The computer system includes a management server 1, a management terminal 2, a business server 3, a primary file storage device 4, and a secondary file storage device 5 connected via a network.

The primary file storage device 4 and the secondary file storage device 5 store files. The primary file storage device 4 and the secondary file storage device 5 provide the business server 3 with a hierarchical file storage environment. The primary file storage device 4 shows a faster response than the secondary file storage device 5.

In this example, the file storage system is configured by the primary file storage device 4 and the secondary file storage device 5, but may include three or more file storage devices or may be configured by a single file storage device. Good. In this example, the number of storage tiers is 2, but the file storage system may have three or more storage tiers.

In this example, the primary file storage device 4 and the secondary file storage device 5 are physical storage devices, but at least one of them may be a virtual storage device. For example, a virtual primary file storage device and a virtual secondary file storage device may be mounted on one physical storage device. A high speed storage device is assigned to the virtual primary file storage apparatus, and a low speed storage device is assigned to the virtual secondary file storage apparatus.

The business server 3 accesses the primary file storage device 4 via the business LAN 6. The primary file storage device 4 receives access to a file stored in the device itself and a file stored in the secondary file storage device 5.

When receiving an access request for a file stored in the secondary file storage device 5, the primary file storage device 4 acquires the file from the secondary file storage device 5 via the data LAN 7 and sends the file to the business server 3. return. The business server 3 may access each of the primary file storage device 4 and the secondary file storage device 5 via the business LAN 6.

The management system 10 includes a management server 1 and a management terminal 2. The user operates the management server 1 using the management terminal 2. Specifically, the management terminal 2 includes an input / output device, presents information to the user, and accepts input of information including a command from the user. The management server 1 communicates with the management terminal 2 via the management LAN 8. When the management server 1 includes an input / output device, the management terminal 2 may be omitted.

The management server 1 communicates with other devices via the management LAN 8 and manages them. The management server 1 determines a relocation configuration candidate for the files stored in the primary file storage device 4 and the secondary file storage device 5. In response to an instruction from the management server 1, the primary file storage device 4 and the secondary file storage device 5 transmit and receive files via the data LAN 7, and rearrange the files. The type of network that connects each device is not limited to this example.

FIG. 2 shows a configuration example of the management server 1. The management server 1 includes a processor 11, a memory 12, a database 13, and a LAN port 14, which are connected by a bus. The management server 1 is connected to the management LAN 8 via the LAN port 14.

The memory 12 stores a file I / O history information collection program 121, a rearrangement condition designation image display program 122, and a rearrangement condition change program 123. The database 13 is stored in, for example, a nonvolatile or volatile memory device. The database 13 stores a file I / O history information table 131 and a relocation condition table 132.

The management terminal 2 includes input / output devices in addition to the same hardware configuration as the management server 1. The management terminal 2 includes a user interface program, displays information received from the management server 1 by the program on the input / output device, and transmits information input from the input / output device to the management server 1. The user interface program is, for example, a web browser.

FIG. 3 shows a configuration example of the primary file storage device 4. The primary file storage device 4 includes a processor 41, a memory 42, a database 43, a plurality of file systems 44, and a LAN port 45, which are connected by a bus. The primary file storage device 4 is connected to the LANs 6 to 8 via the LAN port 45. The database 43 and the file system 44 are stored in, for example, a nonvolatile or volatile memory device. The file system 44 stores files that are accessed by the business server 3.

The memory 42 stores a file I / O history information management program 421, a rearrangement condition registration program 422, a file rearrangement program 423, and an I / O response program 424. The database 43 stores a file management information table 431, a rearrangement condition table 432, and a file I / O history information table 433. The information stored in the relocation condition table 432 and the file I / O history information table 433 matches the relocation condition table 132 and the file I / O history information table 131 of the management server 1, respectively.

FIG. 4 shows a configuration example of the secondary file storage device 5. The secondary file storage device 5 includes a processor 51, a memory 52, a plurality of file systems 54, and a LAN port 55, which are connected by a bus. The secondary file storage device 5 is connected to the LANs 6 to 8 via the LAN port 55. The file system 54 is stored in, for example, a nonvolatile storage device. The file system 54 stores files that are accessed by the business server 3.

The memory 52 stores a secondary I / O response program 521. The secondary I / O response program 521 processes read requests and write requests from external devices. In this example, read requests and write requests from the primary file storage apparatus 4 are processed.

FIG. 5 shows an example 500 of the rearrangement condition designation image. The rearrangement condition designation image display program 122 of the management server 1 creates a rearrangement condition designation image 500, and the management terminal 2 displays the image 500 on the display device.

The relocation condition designation image 500 in this example is an image created by the management server 1 in response to an operation by the storage administrator before the start of business on 2013/12/31. The management server 1 creates the rearrangement condition designation image 500 using the past I / O history up to the previous day (2013/12/30).

The rearrangement condition designation image 500 displays information on rearrangement rules that are planned by the management server 1 and to be applied at a future time of 2013/12/31. The rearrangement rule indicates a file rearrangement destination. In this example, the relocation destination is one of the primary file storage device 4 and the secondary file storage device 5. In this example, the relocation rule groups files according to the number of days elapsed from the last I / O date, and indicates a relocation destination for each file group. Thereby, the relocation destination of each file is indicated.

The management server 1 determines a relocation rule to be applied based on the directory and relocation conditions specified by the storage administrator. The relocation condition of this example specifies the allocated capacity of the primary file storage device 4. Hereinafter, the allocated capacity is also referred to as a primary allocated capacity. The management server 1 determines the relocation destination of all files in the designated directory based on the designated primary allocation capacity. Details of the method for determining the rearrangement rule will be described later.

In the rearrangement condition designation image 500, the field 501 accepts user designation of a rearrangement execution target, that is, a directory of a file to be rearranged. A field 502 receives a user designation of a primary allocated capacity, that is, an allocated capacity of an upper hierarchy. When the target directory or the primary allocated capacity is changed, the management system 10 changes other parts and redraws.

Section 505 shows the transition of the estimated response time in the future rearrangement rule application date and the past specific period as a line graph (relocation destination estimation). Here, future rearrangement rule application dates and past specific periods are also referred to as analysis periods. In the example of FIG. 5, the future rearrangement rule application date is 12/31, and the analysis period is 12/1 to 12/31.

The management server 1 determines the relocation rule for each day of the analysis period under the specified primary allocation capacity condition, and calculates the estimated response time in the file allocation indicated by the relocation rule. The file arrangement according to the rearrangement rule on each day of the analysis period does not necessarily match the past file arrangement. The management server 1 determines the rearrangement rule for the selected day from the I / O history of the predetermined period from the previous day to the past on the selected day in the analysis period. Details of the method for determining the rearrangement rule and the method for calculating the estimated response time will be described later.

Section 505 shows a response time line graph (past placement destination performance) in the past actual file placement in the analysis period, in addition to a line graph of estimated response time (relocation destination estimation). The management server 1 calculates the response time of each day in the past placement destination results from the I / O history of the analysis period. By showing both transitions, it is possible to more easily determine the effectiveness of the relocation rule in the relocation condition specified by the storage administrator.

Section 505 accepts designation of the start date and end date of the analysis period from the storage administrator. In this example, a period from 12/1 to 12/31 is designated. The default analysis period is, for example, the rearrangement rule application date and 30 days immediately before it. The analysis period displayed in section 505 may consist only of past days. The management server 1 may accept an analysis period consisting of a plurality of discrete days.

The storage administrator can confirm the transition of the estimated response time in the past that correlates with the transition of the response time in the future with reference to the graph of the estimated relocation destination. This is because when the file rearrangement rules are the same and the file has I / O periodicity, the transition of the estimated response time in the past 30 days is similar to the transition of the response time of the next 30 days.

As described above, the section 505 simultaneously displays the transition of the response time in the past actual file arrangement and the transition of the estimated response time in the file arrangement according to the new rearrangement rule. Thereby, the storage administrator can more appropriately determine whether the designated relocation condition is effective, that is, whether the primary allocated capacity for the designated directory is effective.

Fields 503 and 504 indicate the average value and the maximum value of the estimated response time, respectively. The average and maximum estimated response times are the average and maximum estimated response times shown in section 505. In this example, the average value and the maximum value of the estimated response time from 12/1 to 12/31. The storage administrator can confirm whether the average value and the maximum value of the estimated response time are within the allowable range by using the relocation condition registration image 500, and can perform the specified relocation condition.

Section 506 shows some types of estimates when applying the relocation rules on the day selected by the storage administrator from the analysis period. In this example, the storage administrator can select any day from December 1st to December 31st. In this example, the future rearrangement rule application date (12/31) is selected. The default date is, for example, a future rearrangement rule application date.

For example, when a specific day is selected by the storage administrator in the rearrangement estimation line graph in section 505, the management system 10 displays information on the designated date in section 506.

Section 506 shows an estimated value (primary usage amount) of the usage amount of the primary file storage device 4, an estimated value (secondary usage amount) of the usage amount of the secondary file storage device 5, and an estimated response time. From section 506, the storage administrator can confirm the details of I / O in the file allocation to which the relocation rule based on the specified relocation condition is applied.

Section 506 further shows a bar graph 561 of the number of I / Os to the rearranged file and a bar graph 562 of the size of the rearranged file. In the two graphs 561 and 562, the files are grouped according to the number of days elapsed from the last I / O date. For example, when the last I / O day of a file is the previous day (12/30), the number of days elapsed from the last I / O day is one day.

In the graph 561, an asterisk indicates the number of I / Os per unit size. Files surrounded by broken lines in the graphs 561 and 562 are arranged in the primary file storage device 4. In this example, the management system preferentially places a file group having a large number of I / Os per unit size in the primary file storage device 4.

If the estimated value indicated by the relocation condition specifying image 500 is not as desired, the storage administrator specifies a new primary allocated capacity in the field 502. The management server 1 performs recalculation on the specified new primary allocation capacity, and generates a new image for each section.

When the condition registration button 507 is selected by the storage administrator, the management server 1 registers the relocation rule with the designated primary allocated capacity 502 in the relocation condition table 132 for the designated directory 501.

The management server 1 automatically determines a relocation rule according to the determined relocation condition (primary allocated capacity) and the I / O of the file that changes every day, and performs relocation according to the relocation rule. Execute. The rearrangement rule determination method is the same as the rearrangement rule determination method for creating the graph 505 in FIG.

Using the relocation condition registration image 500, the storage administrator confirms the change in the estimated response time due to the change in the primary file storage allocation capacity, and further confirms whether the primary allocation capacity is sufficient to achieve the required response time. In addition, it can be determined whether or not the primary allocated capacity should be applied.

Hereinafter, processing by the management server 1 will be specifically described. FIG. 6 shows a configuration example of the file management information table 431 managed by the primary file storage apparatus 4. The file management information table 431 stores information on files managed by the primary file storage device 4. Files to be managed are stored in the primary file storage device 4 and the secondary file storage device 5.

Specifically, the file management information table 431 includes a directory column 601 indicating a directory to which the file belongs, a file name column 602 of the file, a file placement destination column 603, a file size column 604, and a last I / O date of the file. It has a column 605.

When the I / O response program 424 receives an access request from the business server 3, the I / O response program 424 refers to the file management information table 431 and identifies the storage location of the designated file. In addition, the file relocation program 423 specifies a file storage location with reference to the file management information table 431 in the file relocation. The file rearrangement program 423 updates the file management information table 431 after the file rearrangement.

FIG. 7 shows a configuration example of the rearrangement condition table 132 managed by the rearrangement condition changing program 123 of the management server 1. The relocation condition table 432 held by the primary file storage apparatus 4 has the same configuration, and necessary information is transmitted from the management server 1. The file rearrangement program 423 executes file rearrangement according to the rearrangement condition table 432.

The relocation condition table 132 shows file relocation conditions and file relocation rules. In this example, a file relocation condition and a file relocation rule are defined for each directory.

The target column 611 indicates a directory for executing file relocation. All files in each directory are subject to relocation. The reallocation condition column 612 indicates the capacity of the primary file storage device 4 allocated to each directory in the file reallocation. The rearrangement rule column 613 shows the rearrangement rule applied to each directory. The rearrangement rule column 613 indicates the rearrangement destination of each file group grouped by the number of days elapsed from the last I / O date.

The directory indicated by the target column 611 indicates a directory designated by the storage administrator in the relocation condition designation image 500. The rearrangement condition column 612 indicates the primary allocated capacity designated by the storage administrator in the rearrangement condition designation image 500. When the condition registration button 507 is selected in the rearrangement condition designation image 500, the rearrangement condition change program 123 performs necessary updates in the target column 611 and the rearrangement condition column 612.

The rearrangement rule column 613 indicates the rearrangement rule calculated by the rearrangement condition change program 123 under the conditions indicated by the rearrangement condition column 612. For example, the relocation condition change program 123 periodically calculates a relocation rule for each directory indicated by the target column 611. The reallocation condition change program 123 updates the reallocation destination of each file group according to the calculation result of the reallocation rule.

FIG. 8 shows a configuration example of the file I / O history information table 433 managed by the primary file storage device 4. The file I / O history information table 131 held by the management server 1 has the same configuration and is synchronized. The file I / O history information collection program 121 receives the update information of the file I / O history information table 433 from the primary file storage device 4 and updates the file I / O history information table 131. The update of the file I / O history information table 433 will be described later with reference to FIG.

The file I / O history information table 433 indicates information in which the number of I / O (times), size (GB), and placement destination are recorded in units of days for each file in the directory to which the rearrangement rule is applied. FIG. 8 illustrates partial history information of files in the directory “/ department / product”. FIG. 8 specifically illustrates the history from 2013/12/1 to 2013/12/30.

Column 621 stores history information of the directory “/ department / product”. An example of the column 622 of the file “product.mov” in the column 621 will be described. Other file columns have the same configuration.

The I / O number column 623 indicates the number of I / Os to the file on each day. I / O includes both reading and writing. The size column 624 indicates the size of the file on each day. For example, the size column 624 indicates the final file size of the day. The placement destination column 625 indicates the storage tier in which the file is placed on each day. “P” indicates the primary file storage device 4, and “S” indicates the secondary file storage device 5.

For example, in 2013/12/1, the total number of reads and writes for the file “product.mov” is 30 times, the file size at a specific time is 10 GB, and the placement destination is the primary file storage device 4.

The file I / O history information management program 421 updates the values in the I / O number column and size column of the file for each I / O to the file on each day by the processing according to the flowchart shown in FIG. To do. If there is no I / O to the all day file, the file I / O history information management program 421 stores the same value as the previous day in the size column of the file.

FIG. 9 shows a configuration example of the estimated I / O number calculation result table 651. The rearrangement condition designation image display program 122 creates an estimated I / O number calculation result table 651 in accordance with the user input in the rearrangement condition designation image 500 described with reference to FIG. The creation of the estimated I / O number calculation result table 651 will be described later with reference to the flowchart of FIG.

The rearrangement condition designating image display program 122 refers to the data on the selected date in the estimated I / O number calculation result table 651 when creating the selected date graph 561 in the rearrangement condition designating image 500.

The estimated I / O count calculation result table 651 indicates the estimated file I / O count for each elapsed day in each day of the analysis period (12/1 to 12/31). The elapsed days in the estimated I / O number calculation result table 651 indicates the elapsed days from the last I / O date to the file. As described above, the estimated number of I / Os is not an actual number of I / Os but an estimated value of the number of I / Os in the file allocation according to the relocation rule in the primary allocation capacity designated by the user.

The estimated I / O number calculation result table 651 groups files according to the number of days elapsed since the last I / O date, and indicates the estimated number of I / O of each file group in association with the number of days elapsed. The sum of the estimated number of I / Os for all files having the same number of elapsed days is the estimated number of I / O files for the number of elapsed days.

For example, in I / O on 2013/12/1, the total number of estimated I / Os for all files accessed one day ago is 93. The total number of estimated I / Os for all files accessed two days ago is zero. The estimated number of I / Os being 0 means that there is no file with the number of days elapsed, or there is a file with the number of days elapsed but there is no I / O.

FIG. 10 shows a configuration example of the file size calculation result table 661. The rearrangement condition designation image display program 122 creates a file size calculation result table 661 in accordance with the user input in the rearrangement condition designation image 500 described with reference to FIG. The creation / update of the file size calculation result table 661 will be described later with reference to the flowchart of FIG.

The rearrangement condition designating image display program 122 refers to the data of the selected date in the file size calculation result table 661 when creating the selection date graph 562 in the rearrangement condition designating image 500.

The estimated I / O number calculation result table 651 indicates the total size of the file group for each elapsed day in each day of the analysis period (12/1 to 12/31). The elapsed days in the estimated I / O number calculation result table 651 indicates the elapsed days from the last I / O date to the file. The total size of all files having the same number of elapsed days is the file size of the elapsed days. For example, in 2013/12/1, the total size of all files accessed one day ago is 180 GB. There is no file accessed 2 or 3 days ago.

FIG. 11 shows a configuration example of the rearrangement rule calculation result table 671. The rearrangement condition designation image display program 122 creates a rearrangement rule calculation result table 671 according to the user input in the rearrangement condition designation image 500 described with reference to FIG. The creation of the rearrangement rule calculation result table 671 will be described later with reference to the flowchart of FIG.

The rearrangement condition designation image display program 122 refers to the rearrangement rule calculation result table 671 in order to display information on the primary usage amount and the secondary usage amount in the rearrangement condition designation image 500. Furthermore, the graph 561 indicates a file arranged in the primary file storage device 4 and is also referred to in the response time calculation.

The estimated I / O count calculation result table 651 indicates the estimated state of the file group for each elapsed day in the file allocation according to the relocation rule. The estimated I / O number calculation result table 651 shows information on each day of the analysis period (12/1 to 12/31).

For example, in FIG. 11, a column 681 whose elapsed days is one day includes an I / O number column 682, a size column 683, an (I / O number) / (size) column 684, and an arrangement destination column 685. The other elapsed days columns have the same configuration.

The column 681 whose elapsed days is 1 day indicates information of a file group accessed one day ago. The I / O number column 682 stores the estimated I / O number shown in FIG. The size column 683 stores the file size shown in FIG. The (I / O number) / (size) column 684 shows a value obtained by dividing the value of the I / O number column 682 by the size column 683. That is, it indicates the estimated number of I / Os per unit file size.

The placement destination column 685 indicates the placement destination of the file group according to the rearrangement rule in the primary allocation capacity designated by the user. “P” indicates the primary file storage device 4, and “S” indicates the secondary file storage device 5.

For example, in 2013/12/1, for example, the rearrangement rule indicates that the file group accessed one day ago is stored in the primary file storage device 4. In 2013/12/2, the rearrangement rule indicates that the file group accessed one day ago is stored in the primary file storage device 4.

FIG. 12 shows a configuration example of the estimated response time calculation result table 691. The rearrangement condition designation image display program 122 creates an estimated response time calculation result table 691 in accordance with the user input in the rearrangement condition designation image 500 described with reference to FIG. The creation of the rearrangement rule calculation result table 671 will be described later with reference to the flowcharts of FIGS.

The rearrangement condition designating image display program 122 refers to the estimated response time calculation result table 691 in order to display information related to the response time in the rearrangement condition designating image 500. For example, it is referred to in section 505 to create a line graph showing the transition of the estimated response time.

The estimated response time calculation result table 691 shows information on the response time on each day of the analysis period (12/1 to 12/31). The estimated response time calculation result table 691 includes an arrangement destination result column 692 and a rearrangement destination estimation column 693.

The placement destination result column 692 shows the response time calculated based on the past placement destination results for each day. The relocation destination estimation column 693 indicates the estimated response time calculated based on the estimation of the arrangement destination determined by the management server 1.

The rearrangement condition designation image display program 122 stores the result calculated in the past placement destination actual response time calculation process of FIG. The rearrangement condition designation image display program 122 stores the result calculated in the rearrangement destination estimation response time calculation process of FIG. 19 in the rearrangement destination estimation column 693.

FIG. 13 shows the flow of file I / O history information collection processing. The file I / O history information collection program 121 of the management server 1 updates the file I / O history information table 131 of the management server 1 by executing the flow periodically (once a day), for example.

The file I / O history information collection program 121 acquires file I / O history information from the primary file storage device 4 (S11). The information to be acquired may be only information changed in the file I / O history information table 433 after the previous acquisition, or all information in the file I / O history information table 433. The file I / O history information collection program 121 updates the file I / O history information table 131 in the management server 1 using the acquired data (S12).

FIG. 14 shows the flow of the rearrangement condition designation image display process. This process is called when the storage administrator newly designates a relocation execution target directory or a primary allocated capacity of the target directory in the relocation condition designation image 500 shown in FIG. The rearrangement condition designation image display program 122 updates the rearrangement condition designation image 500 according to the flow.

The relocation condition designating image display program 122 acquires the file I / O history information of the target directory designated by the storage administrator from the file I / O history information table 131 (S21).

The rearrangement condition designation image display program 122 executes the estimated I / O number calculation process using the file I / O history information acquired in step S21, and stores the value in the estimated I / O number calculation result table 651 ( S23). The estimated I / O number calculation result table 651 enables drawing of the estimated I / O number graph 561 for each elapsed day from the last I / O date. Details of step S23 will be described later with reference to FIG.

The rearrangement condition designating image display program 122 executes the file size calculation process using the file I / O history information acquired in step S21, and stores the value in the file size calculation result table 661 (S25). The file size calculation result table 661 enables the drawing of the file size graph 562 for each elapsed day from the last I / O date. Details of step S25 will be described later with reference to FIG.

The rearrangement condition designation image display program 122 executes the rearrangement rule calculation process using the estimated I / O number calculation result table 651 and the file size calculation result table 661, and stores values in the rearrangement rule calculation result table 671. (S27). In the rearrangement rule calculation result table 671, in the rearrangement condition designating image 500, an estimated value of the number of I / Os per file size of the file group for each of the primary usage amount, secondary usage amount, and elapsed days (stars in the graph 561). ) Can be shown. Details of step 27 will be described later with reference to FIG.

The rearrangement condition designation image display program 122 uses the file I / O history information acquired in step S21 to execute past placement destination actual response time calculation processing, and stores a value in the estimated response time calculation result table 691 (S29). ). The estimated response time calculation result table 691 can show the transition of the response time of the past placement destination record in the graph 505 showing the transition of the estimated response time. Details of this step 29 will be described later with reference to FIG.

The rearrangement condition designation image display program 122 uses the rearrangement rule calculation result table 671, executes rearrangement destination estimated response time calculation processing, and stores a value in the estimated response time calculation result table 691 (S31). The estimated response time calculation result table 691 can show the transition of the estimated response time of the rearrangement destination in the graph 505 showing the transition of the estimated response time. Details of step 31 will be described later with reference to FIG.

The rearrangement condition designation image display program 122 redraws the rearrangement condition designation image 500 with reference to the table as a result of steps 23 to 31 (S33). The rearrangement condition designation image display program 122 generates image data and transmits it to the management terminal 2.

FIG. 15 shows the flow of the estimated I / O number calculation process S23. In this process, the estimated number of I / Os in the file group for each elapsed day is calculated for each day in the analysis period. Efficient processing is realized by grouping files. In addition, by grouping by elapsed days, it is possible to make a loop without depending on the file system configuration.

This processing creates an estimated I / O number calculation result table 651. The relocation condition designation image display program 122 sequentially estimates the estimated number of I / Os for each file group grouped by the number of days elapsed from the last I / O date in the order from the start date to the end date of the analysis period designated by the storage administrator. Calculate

First, in step S231, the arrangement condition designation image display program 122 initializes the estimated I / O number calculation result table 651. Thereby, the estimated I / O number calculation result table 651 filled with the initial value is created.

The rearrangement condition designation image display program 122 sequentially selects the analysis dates from the analysis start date to the analysis end date designated by the storage administrator, and repeatedly executes the steps from step S232 to S240.

The rearrangement condition designation image display program 122 refers to the file I / O history information table 131, sequentially selects the files existing on the selected analysis date, and repeatedly executes the steps from step S233 to S239. . The file existing on the future rearrangement rule application date (12/31) may be a file existing on the previous day. Alternatively, the file existing on each selected analysis date may be a file in which the placement destination is defined on the day before the selected analysis date in the file I / O history information table 131.

In step S234, the rearrangement condition designation image display program 122 initializes the I / O interval list. The I / O interval list indicates the number of I / O interval days for the selected file in a predetermined period past the selected analysis date. This example uses a history of 30 days immediately before the analysis date. Other values may be used for the length of the period and the start / end date of the period.

In step S235, the rearrangement condition designating image display program 122 specifies the number of interval days between I / Os that occurred in the 30-day period immediately before the selected analysis date, and records it in the I / O interval list.

Specifically, the rearrangement condition designation image display program 122 refers to the file I / O history information table 131, and an I / O for the selected file occurs on the 30th day immediately before the selected analysis date. Identify the days you ’re doing. The rearrangement condition designating image display program 122 calculates each interval day on the specified I / O occurrence date and records it in the I / O interval list.

The I / O interval days are the interval days between consecutive I / O occurrence days. For example, when an I / O occurs at 12/1 and the next day when the I / O occurs is 12/4, the interval number is 3 days. Therefore, the number of interval days is defined by subtracting 1 from the number of specified I / O occurrence days.

For example, assume that the selected analysis date is 12/31. Assume that the I / O to the selected file has occurred only on 12/1, 12/11, 12/19, and 12/30 on the last 30 days. The I / O interval days are 10 days, 8 days, and 11 days.

In step S236, the rearrangement condition designation image display program 122 calculates an average value of the number of I / O interval days recorded in the I / O interval list. In the above example, the average value of the I / O interval days is (10 + 8 + 11) /3=9.7.

In step S237, the rearrangement condition designation image display program 122 determines that the number of days elapsed from the last I / O date of the selected file to the selected analysis date is one before or after the average value of the I / O interval days. Determine if it matches any of the days. In the above example, the number of days within one day before and after the average value of the I / O interval days is a number of days between 8.7 and 10.7, that is, 9 days and 10 days. The number of days between 9.2 and 10.2 may be 9 days, not within 1 day before and after, but within 0.5 days before and after.

• If the selected analysis date is not within one day before or after the average value of the I / O interval days, the possibility of I / O occurring is low. The value in the estimated I / O number calculation result table 651 remains the initial value “0” and does not need to be updated. Note that the average value of I / O interval days may be rounded down, rounded up, or rounded, and the selected analysis date may be compared.

If the determination result in step S237 is affirmative, the rearrangement condition designation image display program 122 determines that I / O occurs in the selected file on the selected analysis date.

In step S238, the rearrangement condition designation image display program 122 updates the value of the cell of the elapsed days of the selected analysis date in the estimated I / O number calculation result table 651.

Specifically, the rearrangement condition designation image display program 122 calculates an average value of the number of I / Os on the I / O occurrence date on the 30th day immediately before the analysis date, and calculates the average value as an estimated I / O number calculation result It adds to the cell of the corresponding elapsed days in the table 651. The average value of the number of I / Os is a value obtained by dividing the total number of I / Os in the last 30 days by the number of I / O occurrence days.

Note that files whose elapsed days are greater than or equal to the maximum value may be grouped into one group as files that do not generate I / O on the selected analysis date. This point is the same in the following description.

FIG. 16 shows the flow of the file size calculation process S25. In this process, the total file size for each elapsed day is calculated for each day in the analysis period. This process creates a file size calculation result table 661. The relocation condition designation image display program 122 calculates the file size of each file group grouped by the number of days elapsed from the last I / O date in order from the start date to the end date of the analysis period designated by the storage administrator. .

First, in step S251, the arrangement condition designation image display program 122 initializes the file size calculation result table 661. As a result, a file size calculation result table 661 filled with initial values is created.

The rearrangement condition designation image display program 122 sequentially selects the analysis dates from the analysis start date to the analysis end date designated by the storage administrator, and repeatedly executes the steps from step S252 to S257.

The rearrangement condition designation image display program 122 refers to the file I / O history information table 131, sequentially selects the files existing on the selected analysis date, and repeatedly executes the steps from step S253 to S256. . The file existing on the future rearrangement rule application date (12/31) may be a file existing on the previous day. Alternatively, the file existing on each selected analysis date may be a file in which the placement destination is defined on the day before the selected analysis date in the file I / O history information table 131.

In step S254, the rearrangement condition designating image display program 122 identifies the number of days that have elapsed from the last I / O date of the selected file to the selected analysis date. Specifically, the rearrangement condition designation image display program 122 refers to the file I / O history information table 131, specifies the last I / O date for the selected file, and displays the selected analysis date. Calculate elapsed days. The last I / O date is the last date in the file I / O history information table 131 where the number of I / Os of the file is 1 or more.

In step S255, the rearrangement condition designating image display program 122 updates the cell of the specified number of elapsed days in the selected analysis date entry. Specifically, the file size of the selected file is added. On the future rearrangement rule application date, the file size of the selected file may be the size of the previous day. Alternatively, the file size of the selected file on each analysis date may be the size of the day before the analysis date in the file I / O history information table 131.

FIG. 17 shows the flow of the rearrangement rule calculation process S27. The rearrangement condition designation image display program 122 uses the estimated I / O number calculation result table 651 and the file size calculation result table 661 for each file group having the same number of days elapsed from the last I / O date. Determine relocation rules that define storage tiers. This processing generates a rearrangement rule calculation result table 671.

In step S271, the rearrangement condition designation image display program 122 initializes the rearrangement rule calculation result table 671. In this example, the initial value of “I / O number”, “size”, and “(I / O number) / (size)” is 0, and the initial value of “arrangement destination” is S.

The rearrangement condition designation image display program 122 sequentially selects the analysis dates from the analysis start date to the analysis end date designated by the storage administrator, and repeatedly executes the steps from step S272 to S279. The rearrangement condition designation image display program 122 sequentially selects a group of files having the same number of elapsed days, and repeatedly executes the steps from step S273 to S275.

In step S274, the rearrangement condition designation image display program 122 updates the rearrangement rule calculation result table 671. Specifically, in the column of the selected elapsed days in the row of the selected analysis date, the rearrangement condition designation image display program 122 reads the I / O number, size, (I / O number) / ( Size). The I / O number is acquired from the estimated I / O number calculation result table 651. The size is acquired from the file size calculation result table 661.

In step S276, the rearrangement condition designating image display program 122 selects the entry with the largest (I / O count) / (size) among the elapsed days entries where the placement destination is S in the selected analysis date column. It is determined as an entry candidate (P candidate) to be stored in the primary file storage device 4 (P).

That is, the relocation condition designating image display program 122 determines the file group having the largest number of I / Os per size among the file groups with the placement destination S as candidates to be stored in the primary file storage device 4. As a result, when the entire target directory is viewed, access to the primary file storage device 4 increases.

In step S277, the rearrangement condition designation image display program 122 confirms whether the candidate file group can be stored in the primary file storage device 4. Specifically, the rearrangement condition designating image display program 122 adds the file size of the candidate elapsed days entry to the total file size of the entry whose placement destination is P in the selected analysis date column. . The rearrangement condition designation image display program 122 compares the calculated value with the primary allocated capacity designated by the storage administrator.

If the calculated value is less than or equal to the primary allocated capacity (S277: YES), in step S278, the rearrangement condition designation image display program 122 changes the value of the placement destination cell of the P candidate elapsed days entry from S to P. .

If the calculated value is larger than the primary allocated capacity, the rearrangement condition designation image display program 122 ends the processing of the selected analysis date. The rearrangement condition designation image display program 122 may select the next P candidate when the calculated value is larger than the primary allocated capacity. The next P candidate is an elapsed day entry with the next largest (I / O count) / (size).

According to the rearrangement rule for the selected analysis date, a file group of elapsed days in which P is stored is arranged in the primary file storage device 4, and a file group of elapsed days in which S is stored is arranged in the secondary file storage device 5. Instruct.

FIG. 18 shows a flow of past placement destination actual response time calculation processing S29. In this process, the response time of each analysis date within the analysis period is calculated based on the past placement destination record of the file in the file I / O history information table 131. In this process, a value is stored in the placement destination result column 692 of the estimated response time calculation result table 691.

In step S291, the rearrangement condition designation image display program 122 initializes the estimated response time calculation result table 691. For example, the initial values of the placement destination record column 692 and the rearrangement destination estimation column 693 are 0.

The rearrangement condition designation image display program 122 sequentially selects the analysis dates from the analysis start date to the analysis end date designated by the storage administrator, and repeatedly executes the steps from step S292 to S300.

The rearrangement condition designating image display program 122 sequentially selects the files on which I / O occurred on the selected analysis date, and repeatedly executes the steps from step S293 to S298. The rearrangement condition designation image display program 122 refers to the file I / O history information table 131 and sequentially selects a file having an I / O count of 1 or more in the designated directory on the selected analysis date.

In step S294, the rearrangement condition designation image display program 122 prepares a variable R that holds a value for calculating the estimated response time. As an initial value, 0 is assigned to the variable R.

In step S295, the rearrangement condition designation image display program 122 refers to the file I / O history information table 131 and identifies the placement destination of the selected file on the selected analysis date. If the placement destination is P, that is, the primary file storage device 4 (S295: YES), the rearrangement condition designation image display program 122 proceeds to step S296. If the placement destination is S, that is, the secondary file storage device 4 (S295: NO), the rearrangement condition designation image display program 122 proceeds to step S297.

In step S296, the rearrangement condition designation image display program 122 calculates the response time of the file placed in the primary file storage device 4. Specifically, the rearrangement condition designation image display program 122 calculates a product of the value of the number of I / Os of the selected file and a constant pr (ms), and adds the calculated value to the variable R. The constant pr (ms) is defined as a response time required for one I / O of a file placed in the primary file storage device 4.

In step S297, the rearrangement condition designation image display program 122 calculates the response time of the file placed in the secondary file storage device 5. Specifically, the rearrangement condition designation image display program 122 calculates the product of the I / O count value of the selected file and the constant sr (ms), and adds the calculated value to the variable R. The constant sr (ms) is defined as the response time required for one I / O for a file placed in the secondary file storage device 5.

In step S299, the rearrangement condition designating image display program 122 updates the selected analysis date entry in the placement destination result column 692 in the estimated response time calculation result table 691.

Specifically, the rearrangement condition designation image display program 122 calculates a value obtained by dividing the variable R by the total number of I / Os on the selected analysis date. The variable R is the total response time of all I / Os on the selected analysis date. Therefore, the calculated value corresponds to the response time on the selected analysis date. The rearrangement condition designating image display program 122 stores the calculated value in the cell of the selected analysis date in the placement destination result column 692.

FIG. 19 shows the flow of the relocation destination estimation response time calculation process S31. This process calculates an estimated response time when it is assumed that the relocation rule in the primary assigned capacity designated by the user is applied on each analysis date within the analysis period. In this processing, the rearrangement condition designation image display program 122 refers to the rearrangement rule calculation result table 671. In this process, a value is stored in the relocation destination estimation column 693 of the estimated response time calculation result table 691.

The rearrangement condition designation image display program 122 sequentially selects the analysis dates from the analysis start date to the analysis end date designated by the storage administrator, and repeatedly executes the steps from step S301 to S309.

The rearrangement condition designation image display program 122 refers to the rearrangement rule calculation result table 671, sequentially selects the elapsed days entry on the selected analysis date, and repeatedly executes the steps from step S302 to S307.

In step S303, the rearrangement condition designation image display program 122 prepares a variable R that holds a value for calculating the estimated response time. As an initial value, 0 is assigned to the variable R.

In step S304, the rearrangement condition designation image display program 122 refers to the entry of the analysis date and the elapsed days selected from the rearrangement rule calculation result table 671, and whether the value of the placement destination column is P, that is, the placement It is determined whether the destination is the primary file storage device 4.

If the placement destination is the primary file storage device 4 (S304: YES), the rearrangement condition designation image display program 122 proceeds to step S305. When the placement destination is the secondary file storage device 5 (S304: NO), the rearrangement condition designation image display program 122 proceeds to step S306.

In step S305, the rearrangement condition designation image display program 122 calculates the estimated response time of the files arranged in the primary file storage device 4. Specifically, the rearrangement condition designation image display program 122 calculates the product of the value of the number of I / Os of the selected elapsed day entry and a constant pr (ms), and adds the calculated value to the variable R. . As described above, the constant pr (ms) is defined as the response time required for one I / O for a file placed in the primary file storage device 4.

In step S306, the rearrangement condition designation image display program 122 calculates the estimated response time of the file placed in the secondary file storage device 5. Specifically, the rearrangement condition designation image display program 122 calculates the product of the I / O count value of the elapsed days entry and the constant sr (ms), and adds the calculated value to the variable R. As described above, the constant sr (ms) is defined as the response time required for one I / O for a file placed in the secondary file storage device 5.

In step S308, the rearrangement condition designation image display program 122 updates the selected analysis date entry in the rearrangement destination estimation column 693 in the estimated response time calculation result table 691.

Specifically, the rearrangement condition designation image display program 122 calculates a value obtained by dividing the variable R by the total number of I / Os on the selected analysis date. The rearrangement condition designation image display program 122 stores the calculated value in the cell of the selected analysis date in the rearrangement destination estimation column 693.

In the calculation of the estimated response time of the past analysis date in the management server 1 and the analysis period, the actual number of I / Os on each analysis date may be used.

FIG. 20 shows the flow of relocation condition registration processing. This process updates the relocation condition table 432 of the primary file storage device 4. The reallocation condition changing program 123 of the management server 1 starts the processing when the condition registration button 507 is selected in the reallocation condition designation image 500. This process enables file relocation based on the relocation conditions registered by the storage administrator.

In step S <b> 311, the relocation condition change program 123 of the management server 1 transmits the relocation condition registered by the storage administrator and the relocation rule information calculated based on the relocation condition to the primary file storage device 4. . As a result, the primary file storage apparatus 4 obtains information on the relocation condition and the relocation rule to be newly applied.

The information to be transmitted includes information on the target directory, the primary allocated capacity, and the relationship between the number of days elapsed and the placement destination on the relocation rule application date. Information on the rearrangement rule application date is stored in the rearrangement rule calculation result table 671.

In step S312, the relocation condition registration program 422 of the primary file storage device 4 updates the relocation condition table 432 with the information received from the relocation condition change program 123.

FIG. 21 shows the flow of file relocation processing in the file storage devices 4 and 5. The processing is executed periodically, for example, every day at a predetermined time. The reallocation condition designation image display program 122 of the management server 1 determines the reallocation rule for each directory in the designated reallocation condition and stores it in the reallocation condition table 432. The rearrangement condition determination process corresponds to the rearrangement rule application date process in the procedure described with reference to FIG.

The file relocation program 423 of the primary file storage device 4 relocates each file based on the file management information table 431 and the relocation condition table 432. Relocation in units of files realizes file relocation according to the relocation rule, that is, file relocation that shortens the response time in the directory.

In step S330, the relocation condition designation image display program 122 of the management server 1 determines a relocation rule for each directory and stores it in the relocation condition table 132. Further, the information of the rearrangement condition table 132 is transmitted to the primary file storage device 4. The file relocation program 423 stores the received information in the relocation condition table 432.

The file relocation program 423 sequentially selects files under management and repeatedly executes steps S331 to S335.

In step S332, the file relocation program 423 acquires a relocation rule defined for the selected file. Specifically, the file relocation program 423 first calculates the elapsed days of the selected file from the value in the last I / O date column 605 of the file management information table 431. The file rearrangement program 423 acquires the rearrangement rule defined for the calculated elapsed days from the rearrangement condition table 432. Thereby, the relocation destination of the selected file can be specified.

In step S333, the file relocation program 423 determines whether or not the selected file needs to be relocated. Specifically, the file relocation program 423 determines whether or not the relocation destination specified by the current relocation rule and the current file allocation location are the same. The placement destination column 603 of the file management information table 431 indicates the current placement destination, and the rearrangement rule indicates the rearrangement destination.

If the current relocation and the relocation destination are the same, the file relocation program 423 selects the next file. If the current rearrangement and the rearrangement destination are different, in step S334, the file rearrangement program 423 moves the selected file to the rearrangement destination. The file relocation program 423 updates the file management information table 431 according to the relocation result.

FIG. 22 shows the flow of file I / O history information processing. This flow updates the file I / O history information table 433 in the primary file storage device 4. In response to an I / O request from the business server 3 to the primary file storage device 4, the I / O history information management program 421 executes the processing.

In step S351, the I / O history information management program 421 increments the number of I / Os on the day when I / O is present in the file entry where I / O is present in the file I / O history information table 433. As a result, the number of I / Os on the day of I / O can be left in the history.

In step S352, the I / O history information management program 421 updates the size of the day when the I / O of the corresponding file occurred. Thereby, the size of the file that may change due to the I / O of the business server 3 can be updated to the latest information. In addition, the size of the file at the end of each day can be left in the history.

FIG. 23 shows the flow of I / O response processing by the primary file storage device 4. When the business server 3 issues an I / O request to the primary file storage device 4, the I / O response program 424 executes the processing.

In step S <b> 371, the I / O response program 424 specifies the file location where the I / O was found by referring to the file management information table 431. If the file is stored in the primary file storage device 4 (S371: YES), the I / O response program 424 processes the I / O request.

When the file is stored in the secondary file storage (S371: NO), in step S372, the I / O response program 424 issues an I / O request for the file to the secondary file storage device 5 and receives the response. To do. The secondary I / O response program 521 processes the I / O request and returns a response to the primary file storage device 4.

In step S373, the I / O response program 424 returns a response to the I / O request to the business server 3.

As described above, this embodiment displays a change in the estimated response time of the entire directory within a predetermined past period when operated under the relocation condition set by the storage administrator. As a result, in order to realize the response time requested by the storage administrator, information for determining what kind of relocation conditions need to be set and whether the relocation conditions may be applied I will provide a.

In the present embodiment, a file relocation rule considering the estimated number of I / Os on the next day and the file size is drafted for a file group for each elapsed day from the last I / O date based on the I / O history of the file. To do. Thereby, the number of I / Os for the file group existing in the secondary file storage is reduced, and the response time of the entire directory is shortened. According to this embodiment, the storage administrator does not need to determine the relocation rule, and the setting item of the storage administrator is only the relocation condition (primary allocated capacity) for the directory.

This embodiment realizes a fast response time by placing a file with a large number of I / Os in a high-speed / expensive storage tier, and places a file with a small number of I / Os in a low-speed / cheap storage tier. It is possible to reduce the used capacity of the high-speed and expensive storage tier while reducing the response time degradation seen from the whole directory where the relocation rule is set.

The above configuration is an example, and other configurations are possible. The management system may define the relocation rule for each file without grouping the files into a plurality of groups. You may group by the criteria different from elapsed days. For example, one file group may be configured by files included in the same subdirectory.

The rearrangement condition designation image may display only a part of the above configuration. For example, the rearrangement condition designation image may display only a change in estimated response time assuming a file arrangement according to the rearrangement rule.

The management system may determine the relocation rule without using the number of I / Os and / or the file size. For example, the management system may determine the relocation rule based only on the number of I / Os, or the upper storage tier indicates the location of the file arbitrarily selected from the files for which the I / O of the next day is estimated May be determined.

The above example has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described. In addition, a part of the configuration of an example can be replaced with the configuration of another example, and the configuration of another example can be added to the configuration of an example. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each example.

The above-described configurations, functions, processing units, etc. may be realized in hardware by designing a part or all of them, for example, with an integrated circuit. In addition, each of the above-described configurations, functions, and the like may be realized using software by causing a processor to interpret and execute a program that realizes each function.

Information such as programs, tables, and files for realizing each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card or an SD card. In addition, the control lines and information lines are those that are considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. In practice, it may be considered that almost all the components are connected to each other.

Claims (15)

A storage management system that manages a file storage system that provides multiple storage tiers,
Including a processor, memory, and input / output devices;
The memory holds I / O history information indicating I / O history for each of a plurality of files arranged in the file storage system,
The processor is
Relocation rules for the plurality of files on each day of the past plurality of days are determined using the I / O history information,
Assuming file placement according to the relocation rules of each day, estimating the response time of each day,
A storage management system for displaying a transition of the estimated response times of the plurality of days on the input / output device. The storage management system according to claim 1,
The processor is
Estimating the number of I / Os for each of the plurality of files on each day from the information on the number of I / Os for each of the plurality of files in the I / O history information past each day,
A storage management system that determines a relocation rule for each day using the estimated number of I / Os for each day and the file size of each of the plurality of files. The storage management system according to claim 2,
In determining the relocation rules for each day, the processor
Grouping the plurality of files into a plurality of file groups;
The number of I / Os of each of the plurality of file groups on each day is calculated from the estimated number of I / Os of each of the files on each day,
The storage management system, wherein the relocation rule indicating the storage destination storage tier of each of the plurality of file groups is determined using the number of I / Os and the file size of each of the plurality of file groups. The storage management system according to claim 3,
In the determination of the relocation rule for each day, the processor groups the plurality of files into the plurality of file groups according to the number of days elapsed from the last I / O date before each day to each day. Management system. The storage management system according to claim 2,
In determining the relocation rules for each day, the processor
From the I / O history information, the last I / O date for each of the plurality of files past from each day and the information on the I / O interval of each of the plurality of files in a period past from each day are acquired. ,
Presence or absence of I / O to each of the plurality of files on each day using the information on the last I / O date and the I / O interval of each of the plurality of files,
A storage management system that estimates the number of I / Os of each of the plurality of files on each day using the estimation result. The storage management system according to claim 1,
The processor is
From the I / O history information, obtain information on the placement record of the plurality of files on each day,
Using the information of the placement results, calculate the response time for each day,
A storage management system that simultaneously displays the transition of the estimated response time of the plurality of days and the transition of the response time based on the arrangement performance of the plurality of days on the input / output device. A method of managing a file storage system providing a plurality of storage tiers by a storage management system,
Using the I / O history information indicating the I / O history for each of the plurality of files arranged in the file storage system to determine a relocation rule for the plurality of files on each day of the past plurality of days;
Assuming file placement according to the relocation rules of each day, estimating the response time of each day,
A method of displaying a transition of the estimated response time of the plurality of days. The method of claim 7, comprising:
Estimating the number of I / Os for each of the plurality of files on each day from the information on the number of I / Os for each of the plurality of files in the I / O history information past each day,
A method of determining a relocation rule for each day using the estimated number of I / Os for each day and the file size of each of the plurality of files. The method according to claim 8, comprising:
In determining the relocation rules for each day,
Grouping the plurality of files into a plurality of file groups;
The number of I / Os of each of the plurality of file groups on each day is calculated from the estimated number of I / Os of each of the files on each day,
A method of determining the relocation rule indicating the storage destination storage tier of each of the plurality of file groups by using the number of I / Os and the file size of each of the plurality of file groups. The method of claim 9, comprising:
The method of grouping the plurality of files into the plurality of file groups according to the number of days elapsed from the last I / O date before each day to each day in determining the relocation rule for each day. The method according to claim 8, comprising:
In determining the relocation rules for each day,
From the I / O history information, the last I / O date for each of the plurality of files past from each day and the information on the I / O interval of each of the plurality of files in a period past from each day are acquired. ,
Presence or absence of I / O to each of the plurality of files on each day using the information on the last I / O date and the I / O interval of each of the plurality of files,
A method of estimating the number of I / Os of each of the plurality of files on each day using the estimation result. The method of claim 7, comprising:
From the I / O history information, obtain information on the placement record of the plurality of files on each day,
Using the information of the placement results, calculate the response time for each day,
The method of simultaneously displaying the transition of the estimated response time of the plurality of days and the transition of the response time based on the arrangement result of the plurality of days.
A file storage system that provides multiple storage tiers;
A management system for managing the file storage system,
The management system includes:
Holding I / O history information indicating an I / O history for each of a plurality of files arranged in the file storage system;
Relocation rules for the plurality of files on each day of the past plurality of days are determined using the I / O history information,
Assuming file placement according to the relocation rules of each day, estimating the response time of each day,
A computer system for displaying a transition of the estimated response time of the plurality of days. The computer system according to claim 13,
The management system includes:
Estimating the number of I / Os for each of the plurality of files on each day from the information on the number of I / Os for each of the plurality of files in the I / O history information past each day,
A computer system that determines a rearrangement rule for each day using the estimated number of I / Os for each day and the file size of each of the plurality of files. The computer system according to claim 14, wherein
In the determination of the relocation rule for each day, the management system,
Grouping the plurality of files into a plurality of file groups;
The number of I / Os of each of the plurality of file groups on each day is calculated from the estimated number of I / Os of each of the files on each day,
A computer system that determines the relocation rule indicating the storage destination storage tier of each of the plurality of file groups using the number of I / Os and the file size of each of the plurality of file groups.

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