JP2012164164A - Master terminal, backup terminal, data storage system and data storage method for data storage system - Google Patents

Abstract

A backup system is constructed by a plurality of user PCs connected via a network, and a highly available backup system is provided at low cost.
An operation information storage unit 150 that stores an operation status table 151 of a user PC 100, a data storage request transmission unit 112 that transmits the operation status table 151 to a user PC 100 other than itself, and a user PC 100 that has received the operation status table 151 The similarity receiving unit 113 that receives a similarity indicating the degree of similarity between the own operating status and the operating status of the transmission source user PC 100, and backup storage target data 141 of the user PC 100 based on the similarity A data storage terminal selection unit 114 that selects a user PC 100 other than itself as a data storage terminal device to be stored, and a data storage instruction transmission unit that transmits a data storage instruction including storage target data 141 to the selected data storage terminal device 115.
[Selection] Figure 1

Description

  The present invention relates to a data storage system in which a plurality of user terminal devices including a master terminal device for instructing data storage and a backup terminal device for storing data are connected via a network, and a data storage method of the data storage system .

  In recent years, most of the work has been carried out on PCs (personal computers, personal computers), and when electronic data is lost, the influence is great. Usually, as a backup method, there is a method in which electronic data is placed on a shared server and the system management department performs backup. This method requires an expensive server and is expensive (HW, management labor cost).

  On the other hand, the hard disk of the PC has a large capacity, and unless the electronic data such as a moving image is handled, the disk capacity often remains. Therefore, there is a technique of backing up a disk that is left over by many PCs existing in the organization (see Patent Documents 1 to 3).

JP 2004-102842 A JP 2003-248607 A JP 2008-191898 A

  In the prior art, there is a system that uses a PC as a storage area for electronic data on the premise that there is a “backup management server” that manages the whole. However, it is applicable to an office that has only a small “user PC”. There is a problem that it is difficult.

  In addition, it is possible to physically eliminate the “backup management server” by giving all “user PCs” the function of “backup management server”, but the PC having the function of “backup management server” fails. When the data disappears, the data necessary for restoration stored in the “backup management server” disappears, and as a result, there is a problem that the restoration cannot be performed. Normally, “server” has higher availability than “PC”, backups are taken properly, and operation is such that it can be easily recovered even in the event of a failure. Even if it is inserted, there is a problem that the assumed function cannot be realized.

  In the prior art, the “user PC” requests the “backup monitoring server” to back up its own data, and the “backup monitoring server” makes an inquiry only to the “user PC” that is turned on at that time. The “backup monitoring server” selects a PC to be used based on the file size and the free space. However, in this case as well, a server is required, and there is a problem that it is difficult to apply in an office where only a small “user PC” exists.

  Further, in the prior art, there is a technique in which a user PC that wants to execute backup inquires about the disk capacity of another user PC and executes backup based on the disk capacity of the other user PC. However, if the user PC that can be backed up is selected only by the disk capacity, the operating status of the user PC that is the backup destination cannot be taken into account, so the availability is low, for example, the backup destination is concentrated on PCs that are not frequently used. There is a problem of becoming.

  The present invention has been made to solve the above-described problems, and provides a low-cost and highly available backup system by constructing a backup system by a plurality of user PCs connected via a network. With the goal.

The master terminal device according to the present invention is a master terminal device connected to a plurality of backup terminal devices via a network,
A master terminal operation information storage unit for storing master terminal operation information indicating an operation status of the master terminal device;
An operation information transmission unit that transmits the master terminal operation information stored in the master terminal operation information storage unit to each backup terminal device of the plurality of backup terminal devices;
From the backup terminal devices of the plurality of backup terminal devices that have received the master terminal operation information transmitted by the operation information transmitting unit, the operation status of the backup terminal device and the operation of the master terminal device indicated by the master terminal operation information A similarity receiver that receives a similarity for selection indicating a degree of similarity to the situation;
Based on the selection similarity received by the similarity receiver, a data storage terminal device for storing backup target data held by the master terminal device is selected from the plurality of backup terminal devices using a processing device. A data storage terminal selection unit to perform,
A data storage instruction transmission unit that transmits data storage instruction information that includes the storage target data and instructs storage of the storage target data to the data storage terminal device selected by the data storage terminal selection unit; It is characterized by that.

The master terminal operation information storage unit is
The power on / off information in which the power on / off state of the master terminal device is recorded in time series is stored as the master terminal operation information.

The backup terminal operation information transmitted by any one of the plurality of backup terminal devices, and an operation information receiving unit that receives backup terminal operation information indicating the operation status of the source backup terminal device;
Based on the backup terminal operating information received by the operating information receiving unit and the master terminal operating information stored in the master terminal operating information storage unit, the backup terminal device of the transmission source indicated by the backup terminal operating information A similarity calculation unit that calculates a similarity for reply indicating a degree of similarity between the operating status and the operating status of the master terminal device indicated by the master terminal operating information;
And a similarity transmitter that transmits the reply similarity calculated by the similarity calculator to the backup terminal device of the transmission source.

The backup terminal device according to the present invention is
In a backup terminal device connected via a network to a master terminal device having storage target data to be stored,
A backup terminal operation information storage unit for storing backup terminal operation information indicating the operation status of the backup terminal device;
A terminal operation information receiving unit for receiving master terminal operation information indicating an operation status of the master terminal device transmitted from the master terminal device;
Based on the master terminal operating information received by the terminal operating information receiving unit and the backup terminal operating information stored in the backup terminal operating information storage unit, the master terminal device indicated by the master terminal operating information A similarity calculating unit that calculates a similarity for reply indicating a degree of similarity between the operating status and the operating status of the backup terminal device indicated by the backup terminal operating information;
And a similarity transmitter that transmits the reply similarity calculated by the similarity calculator to the master terminal device.

The terminal operation information receiving unit is
Master terminal power on / off information in which the power on / off state of the master terminal device is recorded in time series is received as the master terminal operation information,
The backup terminal operation information storage unit is
Backup terminal power on / off information in which the power on / off state of the backup terminal device is recorded in time series is stored as the backup terminal operation information,
The similarity calculation unit includes:
The similarity for reply is calculated based on the master terminal power on / off information and the backup terminal power on / off information.

The terminal operation information receiving unit is
In each time zone of a plurality of time zones obtained by dividing one day by a predetermined time unit, a master terminal state corresponding value preset in accordance with the power on / off state of the master terminal device is set to the time of the master terminal device. The master terminal power on / off information recorded in association with the power on / off state of the band is received,
The backup terminal operation information storage unit is
In each of the plurality of time zones, a backup terminal status corresponding value set in advance according to the power on / off status of the backup terminal device is set according to the power on / off status of the backup terminal device in the time zone. Receiving the backup terminal power on / off information recorded in association with
The similarity calculation unit includes:
For each time zone of the plurality of time zones, the master terminal state corresponding value recorded in the master terminal power on / off information and the time zone recorded in the backup terminal power on / off information. A value obtained by adding each multiplication result value obtained by multiplying the backup terminal state correspondence value is used as the reply similarity.

The backup terminal device further includes:
A data storage instruction receiving unit that includes master terminal identification information for identifying the master terminal apparatus from the master terminal apparatus and the storage target data and that receives data storage instruction information that instructs storage of the storage target data;
A storage target data storage unit that stores the master terminal identification information and the storage target data in a storage device in association with each other based on the data storage instruction information received by the data storage instruction reception unit. And

A data storage system according to the present invention includes:
In a data storage system in which a plurality of backup terminal devices including a storage device and a master terminal device are connected via a network,
The master terminal device
A master terminal operation information storage unit for storing master terminal operation information indicating the operation status of the master terminal device;
A terminal operation information transmission unit that transmits the master terminal operation information stored in the master terminal operation information storage unit to each backup terminal device of the plurality of backup terminal devices;
Each backup terminal device of the plurality of backup terminal devices,
A backup terminal operation information storage unit for storing backup terminal operation information indicating the operation status of the backup terminal device;
A terminal operating information receiving unit for receiving the master terminal operating information transmitted by the terminal operating information transmitting unit;
Based on the master terminal operating information received by the terminal operating information receiving unit and the backup terminal operating information stored in the backup terminal operating information storage unit, the operating status of the master terminal device and the backup terminal device A similarity calculation unit that calculates a similarity indicating the degree of similarity with the operation status of the processing device,
A similarity transmitter that transmits the similarity calculated by the similarity calculator to the master terminal device;
The master terminal further includes
A similarity receiver for receiving the similarity transmitted from each backup terminal device of the plurality of backup terminal devices;
Data storage for selecting a data storage terminal device for storing backup target data held by the master terminal device from the plurality of backup terminal devices based on the similarity received by the similarity receiver using the processing device A terminal selector,
A data storage instruction transmission unit that includes the storage target data and transmits data storage instruction information that instructs storage of the storage target data to the data storage terminal device selected by the data storage terminal selection unit;
Each backup terminal of the plurality of backup terminals further includes:
A data storage instruction receiving unit for receiving the data storage instruction information transmitted by the data storage instruction transmitting unit;
And a storage target data storage unit for storing the storage target data included in the data storage instruction information received by the data storage instruction reception unit in a storage device.

The data storage method of the data storage system according to the present invention includes:
In a data storage method of a data storage system in which a plurality of backup terminal devices including a storage device and a master terminal device are connected via a network,
The master terminal device transmits master terminal operation information indicating an operation status of the master terminal device to each backup terminal device of the plurality of backup terminal devices, and a terminal operation information transmission step,
Each of the backup terminal devices of the plurality of backup terminal devices receives a terminal operation information reception step of receiving the master terminal operation information transmitted by the terminal operation information transmission step;
Based on the master terminal operating information received by the terminal operating information receiving step, and the backup terminal operating information indicating the operating status of the backup terminal device, each of the backup terminal devices of the plurality of backup terminal devices, A similarity calculation step of calculating a similarity indicating the degree of similarity between the operating status of the device and the operating status of the backup terminal device;
Each backup terminal apparatus of the plurality of backup terminal apparatuses transmits a similarity calculated by the similarity calculation step to the master terminal apparatus,
The master terminal receives the similarity transmitted from each backup terminal device of the plurality of backup terminal devices;
The master terminal uses a processing device from the plurality of backup terminal devices to store a data storage terminal device for storing backup target data held by the master terminal device based on the similarity received in the similarity receiving step. A data storage terminal selection step to be selected,
A data storage instruction transmission in which the master terminal transmits data storage instruction information including the storage target data and instructing storage of the storage target data to the data storage terminal device selected in the data storage terminal selection step Steps,
A data storage instruction receiving step in which each backup terminal of the plurality of backup terminals receives the data storage instruction information transmitted by the data storage instruction transmission step;
Each backup terminal of the plurality of backup terminals includes a storage target data storage step of storing the storage target data included in the data storage instruction information received in the data storage instruction reception step in a storage device. And

  A master terminal device according to the present invention is a master terminal device connected to a plurality of backup terminal devices via a network, a master terminal operation information storage unit for storing master terminal operation information indicating an operation status of the master terminal device; An operation information transmission unit that transmits the master terminal operation information stored in the master terminal operation information storage unit to each backup terminal device of the plurality of backup terminal devices, and the master transmitted by the operation information transmission unit. For selection indicating the degree of similarity between the operation status of the backup terminal device and the operation status of the master terminal device indicated by the master terminal operation information from the backup terminal devices of the plurality of backup terminal devices that have received the terminal operation information A similarity receiver that receives the similarity, and the selection received by the similarity receiver. A data storage terminal selection unit that selects a data storage terminal device that stores storage target data for backup possessed by the master terminal device from the plurality of backup terminal devices using a processing device, based on the similarity for use, and the data A data storage instruction transmitting unit that transmits the data storage instruction information including the storage target data and instructing the storage of the storage target data to the data storage terminal device selected by the storage terminal selection unit; Therefore, since a backup terminal device having a similar operation status can be selected as the data storage terminal device, an effect is achieved in that a highly available backup method can be realized.

2 is a diagram illustrating an overall configuration of a backup system 800 according to Embodiment 1 and functional blocks of a user PC 100. FIG. 4 is a sequence diagram showing a flow of data storage processing of the backup system 800 according to Embodiment 1. FIG. It is a figure which shows an example of the external appearance of user PC100 which concerns on Embodiment 1. FIG. It is a figure which shows an example of the hardware resource of the user PC100 which concerns on Embodiment 1. FIG. 6 is a diagram showing an operation flow of operation information generation / storage processing of the backup system 800 according to Embodiment 1. FIG. 6 is a diagram showing an example of an operation status table 151 generated by an operation information generation / storage process of the backup system 800 according to Embodiment 1. FIG. It is a figure which shows the operation | movement flow of the data storage request | requirement transmission process of user PC100a (master terminal device) of the backup system 800 which concerns on Embodiment 1. FIG. It is a figure which shows the operation | movement flow of the data storage request | requirement reception process of user PC100b, 100c, ..., 100n (backup terminal device) of the backup system 800 which concerns on Embodiment 1. FIG. 6 is a diagram illustrating a method of calculating similarity 1221 of the backup system 800 according to Embodiment 1. FIG. It is a figure which shows the operation | movement flow of the data storage instruction | indication transmission process of user PC100a (master terminal device) of the backup system 800 which concerns on Embodiment 1. FIG. It is a figure which shows the operation | movement flow of the data storage instruction | indication transmission process of user PC100b (backup terminal device) of the backup system 800 which concerns on Embodiment 1. FIG. FIG. 10 is a sequence diagram illustrating a data restoration process of the backup system 800 according to the second embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a diagram showing an overall configuration of a backup system 800 (an example of a data storage system) and functional blocks of a user PC 100 (an example of a master terminal device and a backup terminal device) according to the first embodiment. FIG. 2 is a sequence diagram showing an overview of data storage processing of the backup system 800 according to the first embodiment. The overall configuration of the backup system 800 (data storage system) according to the present embodiment, the functional blocks of the user PC 100 (master terminal device, backup terminal device), and an outline of data storage processing will be described with reference to FIGS. .

  In the backup system 800 (data storage system) according to the present embodiment, a plurality of user PCs 100a, 100b, 100c, 100d,..., 100n (also referred to as client PCs and user terminal devices) are connected to a LAN 200 (local area network). ) Are connected to each other. When described as the user PC 100, all of the plurality of user PCs 100a, 100b, 100c, 100d,..., 100n, or a part of the plurality of user PCs 100a, 100b, 100c, 100d,. Each of the plurality of user PCs 100a, 100b, 100c, 100d,.

  For example, when the user PC 100a, which is one of the plurality of user PCs 100, performs backup of backup target data (storage target data 141) included in the storage device, the backup system 800 includes the user PCs 100 other than the own user PC 100a. This is a system that performs backup by storing the storage target data 141 in a storage device. At this time, there is no need for a backup management server or the like for managing the disk capacity, operation status, etc. of a plurality of user PCs 100 connected to the network.

  In the backup system 800 according to the present embodiment, it is assumed that the user PC 100a is a master terminal device that performs backup of the storage target data 141 among the plurality of user PCs 100a, 100b, 100c, 100d,. Further, user PCs 100b, 100c, 100d,..., 100n other than the user PC 100a are used as backup terminal devices.

  In backup system 800 according to the present embodiment, each of a plurality of user PCs 100 is a terminal having both a function as a master terminal device and a function as a backup terminal device. In the present embodiment, the user PC 100a is a master terminal device, and other user PCs 100 other than the user PC 100a are backup terminal devices. However, the master terminal device may be the user PC 100b, the user PC 100c, or another user PC 100. The user PC 100a also has a function as a backup terminal device.

  In the following, for simplicity of explanation, it is assumed that the master terminal device is the user PC 100a and the backup terminal device is the user PC 100b. The functions of the master terminal device included in the user PC other than the user PC 100a are the same as the functions of the master terminal device of the user PC 100a, and the functions of the backup terminal device included in the user PC other than the user PC 100b are also the functions of the backup terminal device of the user PC 100b. It is the same.

  The user PC 100 includes an operation information generation unit 101, a data storage processing unit 110, a data storage request reception processing unit 120, a data storage instruction reception processing unit 130, a storage target data storage unit 140, an operation information storage unit 150, and a data storage device 160. Prepare.

  The operation information generation unit 101 generates operation information indicating the operation status of the user PC 100. The operating status of the user PC 100 is, for example, the daily power on / off status of the user PC 100, the daily load status of the user PC 100, the free disk status of the user PC 100, and the like. For example, the operation information generation unit 101 includes, as the operation information, an operation status table 151 (terminal operation information, master terminal operation information, backup terminal) in which the daily power on / off state of the user PC 100 is recorded in time series. An example of operation information) is generated. Here, the operation information generation unit 101 and the operation status table 151 included in the user PC 100a may be described as the operation information generation unit 101a and the operation status table 151a. Similarly, for other constituent elements, if subscripts (a, b, c, d,..., N, etc.) are added to the constituent element codes, they are added to the constituent element numerals. It is assumed that the user PC 100 corresponding to the constituent requirement is indicated by a suffix (a, b, c, d,..., N, etc.).

  The user PC 100 includes a storage device as will be described later. The operation information storage unit 150 stores the operation status table 151 generated by the operation information generation unit 101 using a storage device. The operation information storage unit 150 is an example of a master terminal operation information storage unit and a backup terminal operation information storage unit.

  The storage target data storage unit 140 stores storage target data 141 (backup target data), which is electronic data for backup, using a storage device.

  The data storage processing unit 110 includes a data storage request transmission unit 112, a similarity reception unit 113, a data storage terminal selection unit 114, and a data storage instruction transmission unit 115.

  The data storage request transmission unit 112 broadcasts the operation status table 151 stored in the operation information storage unit 150 to user PCs 100 (100b, 100c, 100d,..., 100n) other than the user PC 100 (100a). Send. That is, when the user PC 100a (master terminal apparatus) performs backup of the storage target data 141, the data storage request transmission unit 112 stores the data including the operation status table 151 of the own user PC 100 (100a) (master terminal apparatus). A request 1121 (data storage request information) (see FIG. 2) is generated and transmitted to another user PC 100 (100b, 100c, 100d,..., 100n) (backup terminal device). The data storage request transmission unit 112 is an example of an operation information transmission unit.

  The similarity receiving unit 113 receives the data storage request 1121 transmitted by the data storage request transmitting unit 112 of the own user PC 100 (100a) (master terminal device), and the other user PCs 100 (100b, 100c, 100d,... 100n) (similarity 1221 indicating the degree of similarity between the operating status of the user PC 100 and the operating status of the user PC 100 (100a) indicated by the operating status table 151 included in the data storage request 1121. (1221b, 1221c, 1221d,..., 1221n) (an example of selection similarity) is received (see FIG. 2).

  Based on the similarity 1221 received by the similarity receiver 113, the data storage terminal selector 114 selects a plurality of data storage terminals 300 that store the backup target data 141 held by the own user PC 100 (100 a). The backup terminal device (user PCs 100b, 100c, 100d,..., 100n) is selected using the processing device.

  The data storage instruction transmission unit 115 transmits a data storage instruction 1122 including the storage target data 141 and instructing storage of the storage target data 141 to the data storage terminal device 300 selected by the data storage terminal selection unit 114. . The data storage instruction 1122 transmitted by the data storage instruction transmission unit 115 includes terminal identification information 1123 (master terminal identification information) for identifying the user PC 100 (100a), storage target data 141 (141a), and storage target data 141. (141a) is included.

  The terminal identification information 1123 includes, for example, identification information (IP address, machine name, etc.) of the user PC 100, account information, password information, and the like. The terminal identification information 1123 includes information (data storage method information) related to the storage method of the storage target data 141 (141a).

  For example, as illustrated in FIG. 2, it is assumed that the data storage terminal selection unit 114 of the user PC 100a selects the user PC 100b and the user PC 100d as the data storage terminal device 300. In this case, the data storage instruction transmission unit 115 of the user PC 100a transmits a data storage instruction 1122 to the user PC 100b and the user PC 100d.

  In the above case, the user PC 100a, which is the master terminal device, may instruct the same storage target data 141a to be stored in two locations, the user PC 100b and the user PC 100d. Alternatively, the user PC 100a, which is the master terminal device, divides the storage target data 141a into two, generates a data storage instruction 1122, and divides the storage target data 141a (141a) into two locations, the user PC 100b and the user PC 100d. ) May be stored.

  The data storage request reception processing unit 120 includes a data storage request reception unit 121, a similarity calculation unit 122, and a similarity transmission unit 123.

  The data storage request receiving unit 121 is a data storage request 1121 transmitted by any one of a plurality of user PCs 100 other than the own user PC 100, and an operation status table 151 (operation status) indicating the operation status of the user PC 100 that is the transmission source Data storage request 1121 including (information) is received.

  For example, the data storage request reception unit 121 of the user PC 100a receives the data storage request 1121 including the operation status table 151 of the user PC 100b from the user PC 100b other than the own user PC. Alternatively, the data storage request reception unit 121 of the user PC 100b receives the data storage request 1121 including the operation status table 151 of the user PC 100a from the user PC 100a other than the own user PC. The data storage request receiving unit 121 is an example of an operation information receiving unit. The data storage request 1121 also includes terminal identification information 1123 for identifying the user PC 100 that is the transmission source.

  As shown in FIG. 2, in the present embodiment, the data storage request receiving unit 121 of the user PCs 100b, 100c, 100d,..., 100n (an example of a backup terminal device) receives an operation status table from the user PC 100a to the user PC 100a. Assume that a data storage request 1121 including 151 is received. Hereinafter, the function of the user PC 100b will be described as an example of the backup terminal device. The backup function of other user PCs is the same function.

  The similarity calculation unit 122 is stored in the operation status table 151 (referred to as the operation status table 151a of the user PC 100a) included in the data storage request 1121 received by the data storage request reception unit 121 and the operation information storage unit 150. The operating status of the user PC 100a (master terminal device) indicated by the operating status table 141a (an example of master terminal operating information) based on the operating status table 151 (which is the operating status table 151b of the user PC 100b) that is its own operating information. And the processing device calculates the similarity 1221 (an example of the similarity for reply) indicating the degree of similarity to the operation status of the user PC 100b (the backup terminal device) indicated by the operation status table 151b (an example of the backup terminal operation information). . A method of calculating the similarity 1221 by the similarity calculation unit 122 will be described later.

  The similarity transmitter 123 transmits the similarity 1221 calculated by the similarity calculator 122 to the user PC 100a that is the master terminal device. Based on the terminal identification information 1123 included in the data storage request 1121, the similarity transmission unit 123 returns the similarity 1221 to the user PC 100a that is the master terminal device.

  The data storage request transmission unit 112a sets a threshold 1124 that requires a reply in the data storage request 1121a and transmits it to another user PC 100 (100b, 100c, 100d,..., 100n) (backup terminal device). May be. The threshold 1124 is a predetermined threshold set in advance as the backup system 800.

  For example, the similarity transmission unit 123b of the user PC 100b (backup terminal device) is set by the calculated similarity 1221b and the threshold 1124 (the user PC 100a that is the master terminal device) set in the received data storage request 1121a. The threshold value 1124) is compared by the processing device, and the processing device determines whether or not to return the similarity 1221 to the user PC 100a that is the master terminal device based on the comparison result.

  The data storage instruction reception processing unit 130 includes a data storage instruction reception unit 131 and a storage target data storage unit 132.

  For example, the data storage instruction receiving unit 131b of the user PC 100b instructs the storage of the terminal identification information 1123a, the storage target data 141a, and the storage target data 141a for identifying the master terminal device from the user PC 100a that is the master terminal device. The data storage instruction 1122a including these is received.

  The storage target data storage unit 132b of the user PC 100b associates the terminal identification information 1123 included in the data storage instruction 1122a received by the data storage instruction reception unit 131b with the storage target data 141a, and is a data storage device 160b that is a storage device. To store.

  FIG. 3 is a diagram illustrating an example of an appearance of the user PC 100 included in the backup system 800 according to the first embodiment. In FIG. 3, a user PC 100 includes a system unit 910, a CRT (Cathode / Ray / Tube) or LCD (Liquid Crystal) display device 901, a keyboard 902 (Key / Board: K / B), a mouse 903, and an FDD 904 (Flexible Disk). (Drive), hardware devices such as a compact disk device 905 (CDD), a printer device 906, and a scanner device 907, which are connected by cables and signal lines. The system unit 910 is a computer and is connected to the facsimile machine 932 and the telephone 931 with a cable, and is connected to the Internet 940 via a local area network 942 (LAN 200) and a gateway 941.

  FIG. 4 is a diagram illustrating an example of hardware resources of the user PC 100 included in the backup system 800 according to the first embodiment. 4, the user PC 100 included in the backup system 800 includes a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a processor) that executes a program.

  The CPU 911 is connected to the ROM 913, the RAM 914, the communication board 915, the display device 901, the keyboard 902, the mouse 903, the FDD 904, the CDD 905, the printer device 906, the scanner device 907, and the magnetic disk device 920 via the bus 912, and the hardware. Control the device. Instead of the magnetic disk device 920, a storage device such as an optical disk device or a memory card read / write device may be used.

  The RAM 914 is an example of a volatile memory. The storage media of the ROM 913, the FDD 904, the CDD 905, and the magnetic disk device 920 are an example of a nonvolatile memory. These are examples of a storage device or a storage unit.

  The communication board 915, the keyboard 902, the scanner device 907, the FDD 904, the display device 901, and the like are examples of an input unit and an input device. Further, a touch panel or the like may be provided as an input device. Further, the communication board 915, the display device 901, the printer device 906, and the like are examples of an output unit and an output device.

  The communication board 915 is connected to a facsimile machine 932 and a telephone 931 (including a mobile phone) via a telephone line network. The communication board 915 is connected to the LAN 942 or the like. The communication board 915 is not limited to the LAN 942 and may be connected to the Internet 940, a WAN (wide area network) such as ISDN, or the like. When connected to a WAN such as the Internet 940 or ISDN, the gateway 941 is unnecessary.

  The magnetic disk device 920 stores an operating system 921 (OS), a window system 922, a program group 923, and a file group 924. The programs in the program group 923 are executed by the CPU 911, the operating system 921, and the window system 922.

  The program group 923 stores programs for executing functions described as “˜unit” and “˜means” in the description of the embodiments described below. The program is read and executed by the CPU 911. The file group 924 includes information, data, signal values, variable values, and parameters that are described as “determination results of”, “calculation results of”, and “processing results of” in the description of the embodiments described below. Are stored as items “˜file”, “˜database”, and “˜data”. “˜file”, “˜database”, and “˜data” are stored in a recording medium such as a disk or a memory. Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit, and extracted, searched, referenced, compared, and calculated. Used for CPU operations such as calculation, processing, output, printing, and display. Information, data, signal values, variable values, and parameters are temporarily stored in the main memory, cache memory, and buffer memory during the CPU operations of extraction, search, reference, comparison, operation, calculation, processing, output, printing, and display. Is remembered.

  In addition, the arrows in the flowcharts described in the following description of the embodiments mainly indicate input / output of data and signals. The data and signal values are the RAM 914 memory, the FDD 904 flexible disk, the CDD 905 compact disk, and the magnetic field. The data is recorded on a recording medium such as a magnetic disk of the disk device 920, another optical disk, a mini disk, and a DVD (Digital Versatile Disk). Data and signals are transmitted online via a bus 912, signal lines, cables, or other transmission media.

  In addition, what is described as “to part” in the description of the embodiment described below may be “to circuit”, “to device”, “to device”, “means”, and “to step”. ”,“ ˜procedure ”, or“ ˜processing ”. That is, what is described as “˜unit” may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware. Firmware and software are stored as programs in a recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD. The program is read by the CPU 911 and executed by the CPU 911. That is, the program causes the computer to function as “to part” described below. Alternatively, the procedure or method of “to part” described below is executed by a computer.

  FIG. 5 is a diagram showing an operation flow of operation information generation / storage processing of the backup system 800 according to the present embodiment. FIG. 6 is a diagram illustrating an example of the operation status table 151 generated by the operation information generation / storage process of the backup system 800 according to the first embodiment. The operation information generation / storage process (operation information generation / storage method) of the user PC 100 included in the backup system 800 will be described with reference to FIGS.

<Operation information generation step>
In S110, the operation information generating unit 101 processes the operation status table 151 (an example of master terminal power on / off information and backup terminal power on / off information) in which the power on / off state of the user PC 100 is recorded in time series. Generate by.

  The operation information generation unit 101 stores in the storage device a state correspondence value (an example of a master terminal state correspondence value and an example of a backup terminal state correspondence value) set in advance according to the power on / off state of the user PC 100. And The state-corresponding value is, for example, “−1” if the power supply is continuously off for a certain time zone, “+1” if the power supply is continuously on, or when the power supply is switched from on to off or from off to on. Is “0”.

  The operation information generation unit 101 sets a state-corresponding value preset according to the power-on / off state of the own user PC 100 in each of a plurality of time zones obtained by dividing one day by a predetermined time unit. Is generated as the operation status table 151 in accordance with the power on / off state of the time period.

<Operation information storage step>
In S120, the operation information storage unit 150 stores the operation status table 151 generated by the operation information generation unit 101 in the storage device.

  FIG. 6 shows an operation status table 151a generated by the operation information generation unit 101 of the user PC 100a (master terminal device) and an operation status table 151b generated by the operation information generation unit 101 of the user PC 100b (backup terminal device). Yes.

  The unit time zone T1 of the operation status table 151a indicates that the power is off (-1) from 1 o'clock to 2 o'clock. The unit time zone T2 of the operating status table 151a indicates that the power supply is switched from OFF to ON between 8 o'clock and 9 o'clock. The unit time zone T3 of the operation status table 151b indicates that the power is on (+1) from 21:00 to 22:00.

  As shown in FIG. 6, the operation status table 151 divides a day into one unit of one hour to form 24 unit time zones, and the power on / off state of the own user PC 100 in each unit time zone is shown in each unit time zone. It is the table which matched the state corresponding | compatible value shown. The unit time may not be 1 hour but may be 2 hours or 30 minutes.

  As shown in FIG. 6, the unit time zone T1 of the operation status table 151a indicates that the power is off (-1) from 1 o'clock to 2 o'clock. The unit time zone T2 of the operating status table 151a indicates that the power supply is switched from OFF to ON between 8 o'clock and 9 o'clock. The unit time zone T3 of the operation status table 151b indicates that the power is on (+1) from 21:00 to 22:00.

  In the data storage process of the backup system 800, for example, when the data storage process is executed, the operation status table 151 generated by the operation information generation unit 101 on the previous day may be used.

  In addition, in the user PC 100 of the backup system 800, for example, it is assumed that the operation status table 151 for weekdays for the past month is accumulated in the storage device. Then, the operation information generation unit 101 calculates the average of the operation status table 151 for the past month at a predetermined timing by the processing device, and uses the calculated average value of the operation status table 151 in the data storage process. 151 may be stored in the storage device.

  Alternatively, for example, when the data storage process is activated, the backup system 800 first calculates the average of the operation status table 151 for the past month by the operation information generation unit 101 by the processing device and performs the data storage process. The operating status table 151 to be used may be used.

  The operation status table 151 may be retained for a predetermined period of time, not for weekdays, but may be every day or from Monday to Saturday. In addition, the past amount may be stored in two months or three weeks instead of one month, and can be set flexibly depending on the mode of using the backup system 800.

  FIG. 7 is a diagram showing an operation flow of data storage request transmission processing of the user PC 100a (master terminal device) of the backup system 800 according to the first embodiment.

<Data storage request generation step>
In S <b> 210, the data storage request transmission unit 112 reads the operation status table 151 a stored in the operation information storage unit 150. The data storage request transmission unit 112 generates a data storage request 1121 including the read operation status table 151a and the terminal identification information 1123a of the user PC 100a. The data storage request transmission unit 112 broadcasts the generated data storage request 1121 to the other user PCs 100b, 100c, 100d,..., 100n connected to the backup system 800.

  The user PC 100a stores in advance a threshold 1124 for determining the similarity 1221 returned from another user PC 100 other than the user PC 100a that has received the data storage request 1121 transmitted by the user PC 100a. (See FIG. 1). The threshold 1124 is preset as the backup system 800 and stored in each storage device of the user PC 100. Alternatively, a different threshold 1124 may be stored for each user PC 100.

  That is, the data storage request transmission unit 112a generates a data storage request 1121 including the read operation status table 151a, terminal identification information 1123a, and threshold 1124, and LAN 200 (network) (other user PCs 100b, 100c, 100d,. ..., broadcast to 100n).

  FIG. 8 is a diagram showing an operation flow of data storage request reception processing of the user PCs 100b, 100c,..., 100n (backup terminal device) of the backup system 800 according to the first embodiment.

<Data storage request reception step>
In S310, the data storage request receiving unit 121 receives the data storage request 1121 broadcast from the user PC 100a that is the master terminal device.

<Similarity calculation step>
In S320, the similarity calculation unit 122 reads the operation status table 151b of the own user PC 100b from the storage device. The similarity calculation unit 122 reads the operation status table 151a of the user PC 100a that is the master terminal device included in the data storage request 1121 received by the data storage request reception unit 121. The similarity calculation unit 122 multiplies the state setting values set in the unit time zones of the operating status table 151a (master terminal operating information) and the operating status table 151b (backup terminal operating information) by the processing device. . The similarity calculation unit 122 adds the multiplied values for each unit time zone and stores them in the storage device as the similarity 1221b (similarity for reply) (S330).

  FIG. 9 is a diagram showing a similarity calculation method of the similarity calculation unit according to the present embodiment. For example, the state setting value of the operation status table 151a for the unit time zone T4 (7:00 to 8:00) is “−1”, and the operation status table 151b for the unit time zone T4 (7:00 to 8:00). The state setting value is “−1”. Therefore, the multiplication value of T4 obtained by multiplying the state setting values is “1” (−1 × (−1) = 1). Thus, the multiplication value of each unit time zone is obtained, and the result “18” obtained by adding the obtained multiplication values of each unit time zone is set as the similarity (similarity for reply).

  That is, when the operation status table 151a sent from the user PC 100a is evaluated by the user PC 100b, the user PC 100b first multiplies the values of the same time zone (unit time zone). As a result, “1” is obtained if the user PC 100a and the user PC 100b are in the same state (operating state, power state), “−1” if they are different, and “0” if there is a state transition (point, multiplication value). ) Is obtained. “18”, which is the sum of the points (multiplied values) of one day (0: 0 to 24:00), is the similarity 1221b in the case of FIG. 9 and is the reply similarity for returning “18” to the user PC 100a. .

<Similarity transmission step>
In S340, the similarity transmitter 123 compares the similarity 1221b calculated by the similarity calculator 122 with the threshold 1124 included in the data storage request 1121 by the processing device.

  When the similarity 1221b is equal to or higher than the threshold 1124, the similarity transmission unit 123 determines the similarity based on the terminal identification information 1123a included in the data storage request 1121 (terminal identification information of the user PC 100a that is the master terminal device). 1221b is transmitted to the user PC 100a which is the master terminal device. The similarity transmission unit 123 assigns the terminal identification information 1123b of the user PC 100b to the similarity 1221b to be transmitted, and transmits it to the user PC 100a that is the master terminal device.

  If the similarity 1221b is less than the threshold 1124, the similarity transmission unit 123 ends the process without doing anything.

  That is, when the user PC 100b (backup terminal device) receives a backup request (data storage request 1121) distributed by broadcast, the user PC 100b (backup terminal device) uses the operation status table 151a of the user PC 100a (master terminal device) and its own operation status table 151b. Both user PCs calculate the ratio (similarity) that the power supply is in the same state at the same time, and return the calculated ratio (similarity) to the user PC 100a (master terminal device). When the threshold 1124 is set in the backup request (data storage request 1121), the user PC 100b (backup terminal device) avoids unnecessary traffic when the calculated ratio (similarity) is less than the threshold 1124. Do not reply.

  FIG. 10 is a diagram illustrating an operation flow of data storage instruction transmission processing of the user PC 100a (master terminal device) of the backup system 800 according to the first embodiment. The following processing is processing executed by the user PC 100a that is the master terminal device (the side that issued the request).

<Similarity reception step>
In S410, the similarity receiving unit 113 receives the similarity 1221b, 1221c, 1221d,..., 1221n transmitted from the user PCs 100b, 100c, 100d,. As described above, in each of the user PCs 100b, 100c, 100d,..., 100n, when the calculated similarity 1221 is less than the threshold 1124, the similarity 1221 is not transmitted to the user PC 100a. That is, the user PC 100a (master terminal device) that has issued the request selects the data storage terminal device 300 from the range (medium) of the user PC 100 that has made an answer (reception of similarity), and the data storage terminal An actual backup request (data storage instruction) is sent to the apparatus 300 to perform backup.

<Data storage terminal selection step>
In S420, the data storage terminal selection unit 114 sets the data storage terminal device 300, which is a terminal device for storing the backup storage target data 141, based on the similarity 1221 received by the similarity reception unit 113 to the own user PC 100a. The user PCs 100b, 100c, 100d,..., 100n are selected using the processing device.

  As described above, the similarity 1221 means that the larger the value, the more similar the operating status with the own user PC 100a. Therefore, the data storage terminal selection unit 114 selects a predetermined number (selection number) of the similarity 1221 in descending order from the received similarity 1221, and selects the user PC 100 corresponding to the selected similarity 1221 as the data storage terminal device. Select as 300.

  In the backup system 800, the selected number of data storage terminal devices to be selected for storing backup data (storage target data 141) may be stored in advance in a storage device as a system. Alternatively, the selected number of data storage terminal devices to be selected for each user PC 100 may be stored in the storage device.

  The data storage terminal selection unit 114 reads the selected number of data storage terminal devices to be selected from the storage device. The data storage terminal selection unit 114 uses the processing device to extract the same number of similarities 1221 as the selected number of data storage terminal devices to be selected in descending order of the received similarity 1221 value. The data storage terminal selection unit 114 selects the user PC 100 indicated by the terminal identification information 1123 assigned to the extracted similarity 1221 as a data storage terminal device by the processing device. If the selected number of data storage terminal devices to be selected is larger than the number of received similarities 1221, the data storage terminal selection unit 114 selects all the user PCs 100 corresponding to the received similarities 1221 as data storage terminal devices. To do.

  For example, it is assumed that “2” is stored in advance in the storage device as the number of data storage terminal devices to be selected. Also, two similarities 1221 extracted in descending order from the similarity 1221 received by the user PC 100a (master terminal device) are the similarity 1221b (similarity transmitted by the user PC 100b) and the similarity 1221d (transmitted by the user PC 100d). Similarity). In this case, the data storage terminal selection unit 114 stores the user PC 100b indicated by the terminal identification information 1123b assigned to the similarity 1221b and the user PC 100d indicated by the terminal identification information 1123d assigned to the similarity 1221d. Select as a terminal device.

  Alternatively, the backup terminal device (user PCs 100b, 100c, 100d,..., 100n) uses the free space of the data storage device 160 that can store data together with the similarity 1221 and the terminal identification information 1123 as the master terminal device (user PC 100a). ) Then, the data storage terminal selection unit 114 of the master terminal device (user PC 100a) performs the backup terminal device until the total free capacity of the backup terminal device selected as the data storage terminal device 300 reaches a capacity capable of storing the storage target data 141. From this, the data storage terminal device 300 may be selected. The data storage terminal selection unit 114 of the master terminal device (user PC 100a), when the total free capacity of the backup terminal device selected as the data storage terminal device 300 is smaller than the capacity capable of storing the storage target data 141, It is also possible to display a message such as “possible” on the display device of the user PC 100a. As a result, the user can take measures such as backing up to a different medium.

<Data storage instruction transmission step>
In S430, the data storage instruction transmission unit 115 instructs the data storage terminal device (user PC 100b, user PC 100d) selected by the data storage terminal selection unit 114 to store the storage target data 141 (backup request). Send.

  First, the data storage instruction transmission unit 115 generates a data storage instruction 1122 including the storage target data 141 and the terminal identification information 1123a of the own user PC 100a by the processing device. The data storage instruction transmission unit 115 generates a data storage instruction 1122 using, for example, information (IP address, machine name, etc.), account information, password, data storage method information, etc. of the own user PC 100a as terminal identification information 1123a of the own user PC 100a. To do. The data storage instruction transmission unit 115 transmits the generated data storage instruction 1122 to the data storage terminal device (user PC 100b, user PC 100d).

  At the time of backup of the master terminal device, it is sufficient that at least one counterpart PC (data storage terminal device 300) exists. In order to reduce the risk of data leakage or the like, the storage target data 141 can be divided and backed up to two or more user PCs 100.

  For example, the data storage instruction transmission unit 115 of the user PC 100a divides the storage target data 141 into two storage target data 1411 and storage target data 1412, and a data storage instruction 1122-1 for instructing the storage, and a data storage instruction, respectively. 1122-2 is generated. For example, the data storage instruction transmission unit 115 of the user PC 100a transmits a data storage instruction 1122-1 to the user PC 100b and transmits a data storage instruction 1122-2 to the user PC 100d. The user PC 100b stores the storage target data 1411 in the data storage device 160b as described later, and the user PC 100d stores the storage target data 1412 in the data storage device 160d as described later.

  Further, in order to increase the availability, the user PC 100a can back up one storage target data 141 to two or more user PCs 100.

  The terminal identification information 1123a includes data storage method information on whether the same data as the storage target data 141a is backed up in two places, or whether the storage target data 141a is backed up in two. It shall be assumed.

  Further, in the user PC 100a (master terminal device), it is assumed that the storage device 141a stores the storage target data 141a in which backup terminal and in what storage method.

  FIG. 11 is a diagram showing an operation flow of data storage instruction transmission processing of the user PC 100b (backup terminal device) of the backup system 800 according to the present embodiment. The following processing is, for example, processing executed by the user PCs 100b and 100d that are backup terminal devices.

<Data storage instruction receiving step>
In S510, the data storage instruction receiving unit 131 receives the data storage instruction 1122 transmitted from the user PC 100a that is the master terminal device.

<Storage target data storage step>
In S520, the storage target data storage unit 132 stores the storage target data 141 and the terminal identification information 1123a (terminal identification information of the user PC 100a that is the master terminal device) included in the data storage instruction 1122 received by the data storage instruction reception unit 131. Read by the processor. The terminal identification information 1123a includes, for example, user PC 100a information (IP address, machine name, etc.), account information, password, data storage method information, and the like. The password is used when, for example, the storage target data 141 is protected with a password in order to protect the stored data.

  The storage target data storage unit 132 stores the storage target data 141 and the terminal identification information 1123a in association with each other in the data storage device 160 (storage device). To increase security, data is encrypted when stored. Further, application of RAID (Redundant, Arrays, Of, Inexpensive, Disks) technology and other applications such as storing parity data separately can be easily realized.

  As described above, according to the backup system 800 of the present embodiment, the backup can be performed only by the client PC (user PC 100) in a state where there is no expensive server that controls the whole, so that the low-cost and small-scale can be achieved. Electronic data can be backed up even in an environment.

  Further, according to the backup system 800 of the present embodiment, the user PC (master terminal device) and the backup destination PC (backup terminal device) are compared with each other to select a user PC suitable for the backup destination. Therefore, it is possible to avoid that the backup is biased to a specific user PC, and as a result, the availability is lowered.

  Further, according to the backup system 800 of the present embodiment, a user PC that is likely to be turned on is assigned to the data storage terminal device 300 based on the usage status (operation status table 151) of the user PC and the counterpart user PC. Therefore, it is possible to avoid that backups are concentrated on a specific user PC, and as a result, availability can be increased.

  The backup terminal selection process of the backup system 800 described in the present embodiment uses the operation status table 151, so that the user PC 100 having an operation status similar to that of the own user PC 100a is optimally backed up (backup terminal device 300). It was a technique to choose as. The backup terminal selection processing method can be applied to, for example, a system that moves a processing unit between a plurality of servers using a virtualization technique. In a system in which a processing unit is moved between a plurality of servers using a virtualization technology, the processing efficiency can be improved by moving to a destination server that does not have a similar operation status. Therefore, in the backup terminal selection process, by selecting from the one with the lower similarity 1221, the process can be used for a system that moves a processing unit between a plurality of servers using a virtualization technique.

  In the present embodiment, the method using the operation status table 151 as “operation information indicating the operation status of the user PC 100” used for selecting the data storage terminal device has been described. Here, another example of “operation information indicating the operation status of the user PC 100” will be described. Hereinafter, the master terminal device will be described as a user PC 100a, and the backup terminal device will be described as a user PC 100b.

  A case where the physical distance between user PCs is “operation information indicating the operation status of the user PC 100” will be described. As the operation information, a physical distance between the user PCs 100 can be used. In this case, the user PC 100a broadcasts the physical location of the user PC 100a as a data storage request 1121 to other user PCs 100 in the LAN 200 (network).

  When the user PC 100b receives the data storage request 1121 including the physical location of the user PC 100a, the user PC 100b determines the physical distance between the user PC 100a and the user PC 100b based on the physical location of the user PC 100b stored in the storage device. The similarity 1221b is transmitted to the user PC 100a.

  Alternatively, as “operation information indicating the operation status of the user PC 100”, the logical distance between the user PCs 100, the load on the user PC 100, the performance information of the user PC 100, and the data storage device free capacity (absolute value, ratio) of the user PC 100 Further, it is also possible to use data increase rate statistical information (for example, MB / day) of the user PC 100, the number of already backed up PCs, the amount of already backed up data (size, number), the number of years after introduction, and the like.

  The operation status table 151 described in the first embodiment and the physical distance between the user PCs 100, the logical distance between the user PCs 100, the load of the user PC 100, the performance information of the user PC 100, and the data storage device of the user PC 100 At least one of free space (absolute value, rate), user PC 100 data growth rate statistical information (eg, MB / day), number of already backed up PCs, amount of already backed up data (size, number), year after installation It is also possible to select a user PC 100 that is optimal for backup or a combination of user PCs 100 that is optimal for backup.

  In particular, in the backup system 800, when data increase rate statistical information (for example, MB / day) is used as “operation information indicating the operation status of the user PC 100”, the user PC 100 with a low frequency of data use is identified as the data storage terminal device 300. Can be selected. Further, in the backup system 800, when the number of already backed up PCs and the amount of backed up data are used as “operation information indicating the operating status of the user PC 100”, it is possible to prevent the backup from being concentrated on a specific PC.

Embodiment 2. FIG.
In the present embodiment, data restoration processing (restoration) for restoring backed up data in the backup system 800 will be described. FIG. 12 is a sequence diagram showing data restoration processing in the backup system 800 according to the present embodiment.

  The backup method (data storage method) of the backup system 800 in the present embodiment is the same as that described in the first embodiment.

  As described above, the storage target data storage unit 132 stores the storage target data 141a and the terminal identification information 1123a in association with each other in the data storage device 160b (storage device). The terminal identification information 1123a includes, for example, user PC 100a information (IP address, machine name, etc.), account information, password, data storage method information, and the like.

  As shown in FIG. 12, it is assumed that the user PC 100a is a user PC that executes data restoration processing (restoration), and backup data corresponding to the storage target data 141a of the user PC 100a is stored in the data storage devices 160b and 160d of the user PCs 100b and 100d. It is assumed that 161b and 161d are backed up.

  As described above, the backup data 161b and the backup data 161d may be the same data as the storage target data 141a, respectively. Alternatively, the backup data 161b and the backup data 161d may be combined to form one storage target data 141a.

  The terminal identification information 1123a includes data storage method information on whether the same data as the storage target data 141a is backed up in two places, or whether the storage target data 141a is backed up in two. It shall be assumed.

  First, a case where the user PC 100a knows the storage location of the backup data 161 will be described. For example, a case where the personal computer (user PC 100a) itself operates normally but only specific data is deleted due to an operation mistake or the like corresponds to a case where the storage destination is known. As described above, in the user PC 100a (master terminal device), the storage device stores the storage target data 141a in which backup terminal and in what storage method.

  In the case where the storage destination is known, the user PC 100a transmits a data restoration request 1125 (restore request) to the user PCs 100b and 100d (destination PC). If the other party's PC is powered off, the restoration fails.

  When restoring backup data, if the backup destination PC is not turned on, the WakeOnLan function can forcibly turn on the power, but this is not common. Since the user PC 100a knows which user PC 100 failed due to power-off when the restoration failure occurs, the user can take measures such as having the target user PC turned on. As described above, in the backup system 800, availability can be improved by taking a backup method for securing a plurality of storage destinations of the same data.

  Next, a case where the backup data storage location is not known in the user PC 100a will be described. The case where the storage location is not known corresponds to, for example, that all data has been lost due to a failure of the personal computer (user PC 100a) itself.

  A case where the storage destination is not known will be described with reference to FIG. The user PC 100a obtains the data restoration request 1125a (restore request including the terminal identification information 1123a of the own user PC 100a (information of the user PC 100a (IP address, PC name, etc.)), account information, password, and data storage method information. ) To the LAN 200.

  Upon receiving the data restoration request 1125 from the user PC 100a, the user PCs 100b, 100c, 100d,..., 100n other than the user PC 100a receive the terminal identification information 1123 corresponding to the backup data stored in the data storage device 160. Search by.

  For example, the user PC 100b receives backup data 161b corresponding to the terminal identification information 1123a (information (IP address, PC name, etc.) of the user PC 100a, account information, password, data storage method information, etc.) included in the data restoration request 1125, The restored data 1222b is extracted from the data storage device 160 by the processing device. The user PC 100b transmits the restoration data 1222b to the user PC 100a. Similarly, the user PC 100d transmits the restoration data 1222d to the user PC 100a. The user PC 100c or the like that cannot extract the corresponding backup data 161 does nothing.

  The user PC 100a receives the restoration data 1222b transmitted from the user PC 100b and the restoration data 1222d transmitted from the user PC 100d, and restores the data based on the restoration data 1222b and the restoration data 1222d.

  As described above, according to the backup system 800 according to the present embodiment, the terminal identification information 1123 (information related to backup) is also backed up simultaneously with the backup data 161 (storage target data 141). Restoration can be performed even if all data is lost due to a device failure.

  100 user PC, 101 operation information generation unit, 110 data storage processing unit, 112 data storage request transmission unit, 113 similarity reception unit, 114 data storage terminal selection unit, 115 data storage instruction transmission unit, 120 data storage request reception processing unit 121 Data storage request receiving unit, 122 Similarity calculating unit, 123 Similarity transmitting unit, 130 Data storage instruction receiving processing unit, 131 Data storage instruction receiving unit, 132 Storage target data storage unit, 140 Storage target data storage unit, 141 Storage target data, 150 operation information storage unit, 151 operation status table, 160 data storage device, 161 backup data, 200 LAN, 300 data storage terminal device, 800 backup system, 901 display device, 902 keyboard, 903 mouse, 904 FDD, 05 CDD, 906 printer device, 907 scanner device, 910 system unit, 911 CPU, 912 bus, 913 ROM, 914 RAM, 915 communication board, 920 magnetic disk device, 921 OS, 922 window system, 923 program group, 924 file group 931 telephone, 932 facsimile machine, 940 Internet, 941 gateway, 942 LAN, 1121 data storage request, 1122 data storage instruction, 1123 terminal identification information, 1124 threshold, 1125 data restoration request, 1221 similarity, 1222 restoration data.

Claims (9)

In a master terminal device connected to a plurality of backup terminal devices via a network,
A master terminal operation information storage unit for storing master terminal operation information indicating an operation status of the master terminal device;
A terminal operation information transmission unit that transmits the master terminal operation information stored in the master terminal operation information storage unit to each backup terminal device of the plurality of backup terminal devices;
The master terminal device indicated by the operating status of the backup terminal device and the master terminal operating information from each backup terminal device of the plurality of backup terminal devices that has received the master terminal operating information transmitted by the terminal operating information transmitting unit A similarity receiver that receives a similarity for selection indicating a degree of similarity to the operating status of
Based on the similarity for selection received by the similarity receiver, a data storage terminal device for storing backup target data held by the master terminal device is used from the plurality of backup terminal devices using a processing device. A data storage terminal selection unit to select;
A data storage instruction transmission unit that transmits data storage instruction information that includes the storage target data and instructs storage of the storage target data to the data storage terminal device selected by the data storage terminal selection unit; A master terminal device. The master terminal operation information storage unit is
The master terminal apparatus according to claim 1, wherein power on / off information in which a power on / off state of the master terminal apparatus is recorded in time series is stored as the master terminal operation information. The backup terminal operation information transmitted by any one of the plurality of backup terminal devices, and an operation information receiving unit that receives backup terminal operation information indicating the operation status of the source backup terminal device;
Based on the backup terminal operating information received by the operating information receiving unit and the master terminal operating information stored in the master terminal operating information storage unit, the backup terminal device of the transmission source indicated by the backup terminal operating information A similarity calculation unit that calculates a similarity for reply indicating a degree of similarity between the operating status and the operating status of the master terminal device indicated by the master terminal operating information;
3. The master terminal device according to claim 1, further comprising: a similarity transmitter that transmits the reply similarity calculated by the similarity calculator to the backup terminal device of the transmission source. In a backup terminal device connected via a network to a master terminal device having storage target data to be stored,
A backup terminal operation information storage unit for storing backup terminal operation information indicating the operation status of the backup terminal device;
A terminal operation information receiving unit for receiving master terminal operation information indicating an operation status of the master terminal device transmitted from the master terminal device;
Based on the master terminal operating information received by the terminal operating information receiving unit and the backup terminal operating information stored in the backup terminal operating information storage unit, the master terminal device indicated by the master terminal operating information A similarity calculating unit that calculates a similarity for reply indicating a degree of similarity between the operating status and the operating status of the backup terminal device indicated by the backup terminal operating information;
A backup terminal device comprising: a similarity transmitter for transmitting the reply similarity calculated by the similarity calculator to the master terminal device. The terminal operation information receiving unit is
Master terminal power on / off information in which the power on / off state of the master terminal device is recorded in time series is received as the master terminal operation information,
The backup terminal operation information storage unit is
Backup terminal power on / off information in which the power on / off state of the backup terminal device is recorded in time series is stored as the backup terminal operation information,
The similarity calculation unit includes:
5. The backup terminal device according to claim 4, wherein the reply similarity is calculated based on the master terminal power on / off information and the backup terminal power on / off information. The terminal operation information receiving unit is
In each time zone of a plurality of time zones obtained by dividing one day by a predetermined time unit, a master terminal state corresponding value preset in accordance with the power on / off state of the master terminal device is set to the time of the master terminal device. The master terminal power on / off information recorded in association with the power on / off state of the band is received,
The backup terminal operation information storage unit is
In each of the plurality of time zones, a backup terminal status corresponding value set in advance according to the power on / off status of the backup terminal device is set according to the power on / off status of the backup terminal device in the time zone. Receiving the backup terminal power on / off information recorded in association with
The similarity calculation unit includes:
For each time zone of the plurality of time zones, the master terminal state corresponding value recorded in the master terminal power on / off information and the backup terminal state corresponding value recorded in the backup terminal power on / off information. 6. The backup terminal device according to claim 5, wherein a value obtained by multiplying and adding each multiplication result value obtained by multiplication is set as the reply similarity. The backup terminal device further includes:
A data storage instruction receiving unit that includes master terminal identification information for identifying the master terminal apparatus from the master terminal apparatus and the storage target data and that receives data storage instruction information that instructs storage of the storage target data;
A storage target data storage unit that stores the master terminal identification information and the storage target data in a storage device in association with each other based on the data storage instruction information received by the data storage instruction reception unit. The backup terminal device according to any one of claims 4 to 6. In a data storage system in which a plurality of backup terminal devices including a storage device and a master terminal device are connected via a network,
The master terminal device
A master terminal operation information storage unit for storing master terminal operation information indicating an operation status of the master terminal device;
A terminal operation information transmission unit that transmits the master terminal operation information stored in the master terminal operation information storage unit to each backup terminal device of the plurality of backup terminal devices;
Each backup terminal device of the plurality of backup terminal devices,
A backup terminal operation information storage unit for storing backup terminal operation information indicating the operation status of the backup terminal device;
A terminal operating information receiving unit for receiving the master terminal operating information transmitted by the terminal operating information transmitting unit;
Based on the master terminal operating information received by the terminal operating information receiving unit and the backup terminal operating information stored in the backup terminal operating information storage unit, the operating status of the master terminal device and the backup terminal A similarity calculation unit for calculating a similarity indicating the degree of similarity with the operating status of the apparatus by the processing apparatus;
A similarity transmitter that transmits the similarity calculated by the similarity calculator to the master terminal device;
The master terminal further includes
A similarity receiver for receiving the similarity transmitted from each backup terminal device of the plurality of backup terminal devices;
Data storage for selecting a data storage terminal device for storing backup target data held by the master terminal device from the plurality of backup terminal devices based on the similarity received by the similarity receiver using the processing device A terminal selector,
A data storage instruction transmission unit that includes the storage target data and transmits data storage instruction information that instructs storage of the storage target data to the data storage terminal device selected by the data storage terminal selection unit;
Each backup terminal of the plurality of backup terminals further includes:
A data storage instruction receiving unit for receiving the data storage instruction information transmitted by the data storage instruction transmitting unit;
A data storage system comprising: a storage target data storage unit that stores the storage target data included in the data storage instruction information received by the data storage instruction reception unit in a storage device. In a data storage method of a data storage system in which a plurality of backup terminal devices including a storage device and a master terminal device are connected via a network,
The master terminal device transmits master terminal operation information indicating the operation status of the master terminal device to each backup terminal device of the plurality of backup terminal devices, and a terminal operation information transmission step,
Each of the backup terminal devices of the plurality of backup terminal devices receives a terminal operation information reception step of receiving the master terminal operation information transmitted by the terminal operation information transmission step;
Based on the master terminal operation information received by the terminal operation information receiving step and the backup terminal operation information indicating the operation status of the backup terminal device, each backup terminal device of the plurality of backup terminal devices A similarity calculation step of calculating a similarity indicating the degree of similarity between the operating status of the terminal device and the operating status of the backup terminal device;
Each backup terminal apparatus of the plurality of backup terminal apparatuses transmits a similarity calculated by the similarity calculation step to the master terminal apparatus,
The master terminal receives the similarity transmitted from each backup terminal device of the plurality of backup terminal devices;
A data storage terminal device that stores storage target data for backup possessed by the master terminal device based on the similarity received by the similarity reception step from the plurality of backup terminal devices. A data storage terminal selection step to select using,
Data storage instruction in which the master terminal device includes the storage target data and transmits data storage instruction information for instructing storage of the storage target data to the data storage terminal device selected in the data storage terminal selection step Sending step;
A data storage instruction receiving step in which each backup terminal apparatus of the plurality of backup terminal apparatuses receives the data storage instruction information transmitted in the data storage instruction transmission step;
Each backup terminal device of the plurality of backup terminal devices includes a storage target data storage step for storing the storage target data included in the data storage instruction information received by the data storage instruction reception step in a storage device. A data storage method for a data storage system.

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