CN104283945B - Storage system, storage region system equipment and data transmission method - Google Patents

Abstract

The invention discloses a storage system, storage area system equipment and a data transmission method, belonging to the technical field of data transmission. The system includes at least two storage area system devices, the at least two storage area system devices are interconnected in pairs, each storage area system device includes a plurality of logic units, and the at least two storage area system devices include a first storage area system device , configure a first-level virtual logical unit on the first storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each second-level virtual logical unit corresponds to a user-accessible logical unit, and the user can The logical unit to be accessed is composed of logical units on at least two storage area system devices; the first storage area system device is configured with a corresponding relationship between a first-level virtual logical unit and/or a second-level logical unit and user-accessible logical units .

Description

Storage system, storage area system equipment and data transmission method

technical field

The invention relates to the technical field of data transmission, in particular to a storage system, storage area system equipment and a data transmission method.

Background technique

In a traditional data center, storage area system (English: Storage Area Network, SAN for short) devices and SAN devices are isolated from each other, which is not conducive to the unified management of the data center, and brings a lot of inconvenience to upper-layer applications.

For example, the use of SAN devices in cloud computing scenarios: each user needs to record the information of all SAN devices used, which increases the difficulty of management. Each user establishes a network connection with all the SAN devices used, and the SAN devices are isolated from each other. Data sharing and data flow require user intervention, which consumes a lot of user network resources and central processing unit (English: Central Processing Unit) , referred to as: CPU) resources. In the virtualization scenario, it increases the difficulty of storage load balancing and data replication.

In order to solve the problem of connection number and automatic management between users and SAN devices, the concept of SAN device adapter (English: adapter) is introduced. All SAN devices are first mounted on a SAN device adapter, and then exposed upwards uniformly, and users can obtain a view of the SAN with access rights.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

When the user obtains multiple SAN views, the view is complex; all input/output (English: Input/Output, referred to as: I/O) all pass through the adapter, and the SAN device as the adapter becomes the performance bottleneck of the cluster; and, between the SAN devices The data flow among them needs to go through the SAN device adapter, occupying the resources of the SAN device and affecting the working performance of the SAN device.

Contents of the invention

Embodiments of the present invention provide a storage system, a storage area system device, and a data transmission method. Described technical scheme is as follows:

In one aspect, an embodiment of the present invention provides a storage system, the storage system includes at least two storage area system devices, the at least two storage area system devices are interconnected in pairs, and each storage area system device includes multiple logical units,

The at least two storage area system devices include a first storage area system device, a first-level virtual logical unit is configured on the first storage area system device, and the first-level virtual logical unit includes at least one second-level virtual logical unit, Each of the secondary virtual logical units corresponds to a user-accessible logical unit, and the user-accessible logical unit is composed of logical units on the at least two storage area system devices;

The first storage area system device is configured with the corresponding relationship between the first-level virtual logical unit and the user-accessible logical unit, or the first storage area system device is configured with the first-level virtual logical unit The corresponding relationship between the secondary virtual logical unit and the logical unit accessible to the user, or the first storage area system device is configured with the primary virtual logical unit, the secondary logical unit and the user Correspondence among the three accessible logical units.

In an implementation manner of the embodiment of the present invention, the first storage area system device is used for:

receiving a first small computer system interface SCSI command, the first SCSI command including at least one of a primary virtual logical unit number and a secondary virtual logical unit number;

According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the first SCSI command, look up the corresponding relationship of the system equipment configured in the first storage area, and determine what the first SCSI command requires The user-accessible logical unit of access.

In another implementation manner of the embodiment of the present invention, each storage area system device stores device information of all storage area system devices in the storage system, and the device information includes storage Internet protocol IP address, authentication Any one or any combination of mode, user name and password.

In another implementation manner of the embodiment of the present invention, the first storage area system device is used for:

receiving a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit, the second SCSI command also includes a query instruction, and the query instruction is used to request device information for storage area system devices;

According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the second SCSI command, look up the corresponding relationship of the system equipment configured in the first storage area, and determine that the second SCSI command corresponds to device information of storage area system devices.

On the other hand, an embodiment of the present invention also provides a data transmission method, which is suitable for a first storage area system device in a storage system, and the storage system includes at least two storage area system devices, and the at least two storage area system devices System devices are interconnected in pairs, and the method includes:

receiving a first small computer system interface SCSI command, the first SCSI command including at least one of a primary virtual logical unit number and a secondary virtual logical unit number;

According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the first SCSI command, look up the corresponding relationship between the first-level virtual logical unit and the logical unit accessible to the user, or the one The corresponding relationship between the second-level virtual logical unit and the user-accessible logical unit in the first-level virtual logical unit, or the first-level virtual logical unit, the second-level logical unit, and the user-accessible logical unit The corresponding relationship among the three determines the user-accessible logical unit to be accessed by the first SCSI command.

In an implementation manner of the embodiment of the present invention, the method further includes:

Configuring the first-level virtual logical unit, the first-level virtual logical unit includes at least one second-level virtual logical unit, each of the second-level virtual logical units corresponds to a user-accessible logical unit, and the user The accessible logical units are composed of logical units on the at least two storage area system devices.

On the other hand, the embodiment of the present invention also provides a storage area system device, the storage area system device is in a storage system, and the storage system includes at least two storage area system devices, and the at least two storage area system devices The devices are interconnected in pairs, and the storage area system devices include:

The receiving module is configured to receive a first small computer system interface SCSI command, the first SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit;

A search module, configured to search for a correspondence between the first-level virtual logical unit and user-accessible logical units according to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the first SCSI command , or the corresponding relationship between the second-level virtual logical unit in the first-level virtual logical unit and the logical unit accessible to the user, or the first-level virtual logical unit, the second-level logical unit and the user The correspondence among the three accessible logical units determines the user-accessible logical unit to be accessed by the first SCSI command.

In an implementation manner of the embodiment of the present invention, the storage area system device further includes:

A configuration module, configured to configure the first-level virtual logical unit, the first-level virtual logical unit includes at least one second-level virtual logical unit, each of the second-level virtual logical units is respectively associated with a user-accessible logical unit Correspondingly, the logic unit accessible to the user is composed of logic units on the at least two storage area system devices.

On the other hand, an embodiment of the present invention also provides a data transmission method, which is suitable for a first storage area system device in a storage system, and the storage system includes at least two storage area system devices, and the at least two storage area system devices System devices are interconnected in pairs, and the method includes:

receiving a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit, the second SCSI command also includes a query instruction, and the query instruction is used to request device information for storage area system devices;

According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the second SCSI command, look up the corresponding relationship between the first-level virtual logical unit and the logical unit accessible to the user, or the one The corresponding relationship between the second-level virtual logical unit and the user-accessible logical unit in the first-level virtual logical unit, or the first-level virtual logical unit, the second-level logical unit, and the user-accessible logical unit The correspondence between the three determines the device information of the storage area system device corresponding to the second SCSI command.

On the other hand, the embodiment of the present invention also provides a storage area system device, the storage area system device is in a storage system, and the storage system includes at least two storage area system devices, and the at least two storage area system devices The devices are interconnected in pairs, and the storage area system devices include:

The receiving module is configured to receive a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit, the second SCSI command also includes a query instruction, the The above query command is used to request the device information of the storage area system device;

A search module, configured to search for the correspondence between the first-level virtual logical unit and the user-accessible logical unit according to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the second SCSI command , or the corresponding relationship between the second-level virtual logical unit in the first-level virtual logical unit and the logical unit accessible to the user, or the first-level virtual logical unit, the second-level logical unit and the user The correspondence among the three accessible logical units determines the device information of the storage area system device corresponding to the second SCSI command.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

First, the present invention configures a first-level virtual logical unit on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is respectively connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; secondly, the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access the SAN devices in the storage system. All SAN devices, avoiding all users connecting to one SAN device, and avoiding the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a storage system provided in Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a storage system provided by Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of a storage system provided by Embodiment 3 of the present invention;

FIG. 4 is a flowchart of a data transmission method provided by Embodiment 4 of the present invention;

FIG. 5 is a flowchart of a data transmission method provided by Embodiment 5 of the present invention;

FIG. 6 is a flowchart of a data transmission method provided by Embodiment 6 of the present invention;

FIG. 7 is a block diagram of a SAN device provided by Embodiment 7 of the present invention;

FIG. 8 is a block diagram of a SAN device provided in Embodiment 8 of the present invention;

FIG. 9 is a block diagram of a SAN device provided by Embodiment 9 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

An embodiment of the present invention provides a storage system. Referring to FIG. 1, the storage system 10 includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, and each SAN device includes a plurality of logical units (English: Logical Unit Number, LUN for short), the at least two SAN devices include the first SAN device.

In the embodiment of the present invention, since all SAN devices in the storage system are fully interconnected through the network (that is, the aforementioned two-by-two interconnection), each user only needs to connect to any SAN device in the storage system to access all SAN devices in the storage system. SAN equipment, to avoid all users connected to a SAN equipment. Specifically, in order to implement read and write access through any SAN device, the embodiment of the present invention provides the following ways to configure the LUN of the storage system to implement addressing:

Configure a first-level virtual LUN on the first SAN device, the first-level virtual LUN includes at least one second-level virtual LUN, each of the second-level virtual LUNs corresponds to a user-accessible LUN, and the user can The LUNs accessed are composed of LUNs on the at least two SAN devices;

The first SAN device is configured with the corresponding relationship between the first-level virtual LUN and the user-accessible LUN, or the first SAN device is configured with the first-level virtual LUN and the second-level virtual LUN in the first-level virtual LUN. The correspondence between the user-accessible LUNs, or the correspondence between the first-level virtual LUN, the second-level LUN, and the user-accessible LUNs is configured on the first SAN device.

Further, the first SAN device is mounted with a user and a first-level virtual LUN corresponding to a LUN accessible to the user. The number of the first-level virtual LUN and the number of the second-level virtual LUN are saved on the first SAN device, and the address of each SAN device in the storage system and the address of each SAN device in the storage system are also saved on the first SAN device. The LUN included in the device, the address of the SAN device can be the storage Internet Protocol (English: Internet Protocol, referred to as: IP) address or IQN number, the address of each SAN device in the storage system and the LUN included in each SAN device can be passed It can be realized by manual configuration or obtained through the discovery protocol.

That is to say, in this embodiment, LUNs accessible by the same user are combined into a first-level virtual LUN, and a number is assigned to the first-level virtual LUN; further, a second-level virtual LUN can also be configured for the same user's first-level virtual LUN. LUN, and configure the number for each secondary virtual LUN; when the user arbitrarily mounts to any SAN device in the storage system (subsequently referred to as the user-mounted SAN device), the primary virtual LUN The information is also mounted on the SAN device mounted by the user, and the SAN device mounted by the user saves the number of the first-level virtual LUN and the number of the second-level virtual LUN, and saves the number of the first-level virtual LUN at the same time. The corresponding relationship between the LUN and the LUN accessible to the user, or the corresponding relationship between the secondary virtual LUN and the LUN accessible to the user, or the corresponding relationship between the primary virtual LUN, the secondary LUN and the LUN accessible to the user.

In this embodiment, each user is connected to at least one SAN device.

For example, as shown in FIG. 1, storage system 10 includes SAN device 1, SAN device 2, SAN device 3, SAN device 4, and SAN device 5, and these five SAN devices are interconnected, that is, each SAN device is connected to The other 4 SAN devices are connected. User 1 connects to SAN device 4, user 2 connects to SAN device 1, user 3 connects to SAN device 3, user 4 connects to SAN device 2, and user 5 connects to SAN device 4 and SAN device 3. Wherein, each user may serve as the aforementioned user, and correspondingly, the first SAN device is connected to the user.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. .

Embodiment two

An embodiment of the present invention provides a storage system. Referring to FIG. 2 , the storage system 20 includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs. Each SAN device includes multiple LUNs. The at least two SAN devices The two SAN devices include the first SAN device.

In the embodiment of the present invention, since all the SAN devices in the storage system are fully interconnected through the network, each user only needs to connect to any SAN device in the storage system to access all the SAN devices in the storage system, avoiding all user connections On a SAN device. Specifically, in order to implement read and write access through any SAN device, the embodiment of the present invention provides the following ways to configure the LUN of the storage system to implement addressing:

Configure a first-level virtual LUN on the first SAN device, the first-level virtual LUN includes at least one second-level virtual LUN, each of the second-level virtual LUNs corresponds to a user-accessible LUN, and the user can The LUNs accessed are composed of LUNs on the at least two SAN devices;

The first SAN device is configured with the corresponding relationship between the first-level virtual LUN and the user-accessible LUN, or the first SAN device is configured with the first-level virtual LUN and the second-level virtual LUN in the first-level virtual LUN. The correspondence between the user-accessible LUNs, or the correspondence between the first-level virtual LUN, the second-level LUN, and the user-accessible LUNs is configured on the first SAN device.

Further, the first SAN device is mounted with a user and a first-level virtual LUN corresponding to a LUN accessible to the user. The number of the first-level virtual LUN and the number of the second-level virtual LUN are saved on the first SAN device, and the address of each SAN device in the storage system and the address of each SAN device in the storage system are also saved on the first SAN device. The address of the LUN included in the device and the SAN device can be the storage IP address or IQN number. The address of each SAN device in the storage system and the LUN included in each SAN device can be realized through manual configuration or obtained through a discovery protocol.

In general, to establish a correspondence between a virtual LUN and a user-accessible LUN, it is necessary to map a first-level virtual LUN plus a second-level virtual LUN to a user-accessible LUN at the same time. However, if a first-level virtual LUN There is only one level-2 virtual LUN. At this time, only the level-1 virtual LUN needs to be used to correspond to a user-accessible LUN. If only one level-1 virtual LUN is configured in a SAN device, only the level-2 virtual LUN needs to be used at this time. A virtual LUN corresponds to a user-accessible LUN.

In this embodiment, the first SAN device is used for:

Receiving a first Small Computer System Interface (English: Small Computer System Interface, referred to as: SCSI) command, the first SCSI command includes at least one of the number of the first-level virtual LUN and the number of the second-level virtual LUN;

According to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried by the first SCSI command, search for the corresponding relationship configured on the first SAN device, and determine the location of the user-accessible LUN to be accessed by the first SCSI command SAN device.

Wherein, the first SCSI command is sent by a user connected to the first SAN device.

Further, the first SCSI command may include a read and write command.

When the SAN device where the found LUN is located is the first SAN device, execute the read and write command on the found LUN, and return a data block.

When the SAN device where the found LUN is located is another SAN device in the storage system, forward the read and write commands to the SAN device where the found LUN is located, and receive the data block returned by the SAN device where the found LUN is located , to send the returned chunk of data to the user.

Specifically, when searching, first determine the corresponding first-level virtual LUN and second-level virtual LUN according to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN in the SCSI command, and then search for the first-level virtual LUN according to the corresponding relationship The user-accessible LUN corresponding to the secondary virtual LUN, and finally determine the SAN device where the user-accessible LUN is located.

In this embodiment, the user only needs to connect to one SAN device, and the network connection is convenient.

For example, as shown in FIG. 2 , the storage system 20 includes a SAN device 1, a SAN device 2, a SAN device 3, a SAN device 4, and a SAN device 5, and these five SAN devices are connected to each other, that is, each SAN device is connected to The other 4 SAN devices are connected. User 1 connects to SAN device 4, user 2 connects to SAN device 1, user 3 connects to SAN device 3, user 4 connects to SAN device 2, and user 5 connects to SAN device 4 and SAN device 3. Wherein, each user may serve as the aforementioned user, and correspondingly, the first SAN device is connected to the user.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. .

Embodiment three

The embodiment of the present invention provides a storage system. Referring to FIG. 3, the storage system 30 includes 5 SAN devices, and the 5 SAN devices are interconnected in pairs. Each SAN device includes multiple LUNs, and the 5 SAN devices include the first A SAN device. The number of SAN devices here is just an example, which is not limited in this application.

In this embodiment, the configuration manner of the LUN may be the same as that in Embodiment 1 or 2, which will not be repeated here.

In this embodiment, each SAN device stores device information of all SAN devices in the storage system, and the device information includes any one or any combination of storage IP address, authentication mode, user name and password.

In this embodiment, the first SAN device is used for:

Receive a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual LUN and the number of the second-level virtual LUN, and the second SCSI command also includes a query instruction;

According to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried by the second SCSI command, search for the corresponding relationship configured on the first SAN device, and determine the number of the SAN device corresponding to the second SCSI command Device Information.

Wherein, the second SCSI command is sent by a user connected to the first SAN device.

Further, the first SAN device may also return the found device information to the user.

Wherein, the query instruction is used to request device information of the SAN device.

As shown in FIG. 3 , taking user 1 as an example, SAN device 4 is the first SAN device, and user 1 is also connected to two other SAN devices in addition to the first SAN device. In this embodiment, in addition to data transmission through the first SAN device, user 1 can also directly perform data transmission with the directly connected SAN device. Before data transmission, user 1 needs to connect to the SAN device. This includes processes such as authentication and login. Before authentication and login, user 1 only needs to send the second SCSI command with a query command to the first SAN device to obtain the device information of the SAN device to be connected. The device information includes authentication and login information, thereby completing the automatic connection. No manual input is required, which saves labor and facilitates the management of authentication and login information.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. ; At the same time, when the user is connected to the first SAN device, he is also connected to other SAN devices. At this time, the user can not only transmit data through the first SAN device, but also directly perform data transmission with the SAN device directly connected to himself. Before the transmission, the user needs to connect with the SAN device, including the process of authentication and login. In this process, the user only needs to send the second SCSI command with the query command to the first SAN device to obtain the SAN device to be connected. The device information of the device includes the authentication and login information, so as to complete the automatic connection without manual input, which saves labor and facilitates the management of authentication and login information.

Embodiment Four

An embodiment of the present invention provides a data transmission method, which is suitable for the first SAN device in the storage system. The storage system includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, wherein the configuration of the LUN can be the same as Embodiment one or two are the same, referring to Fig. 4, the method comprises:

Step 401: Receive a first SCSI command, where the first SCSI command includes at least one of a number of a primary virtual LUN and a number of a secondary virtual LUN.

Step 402: According to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried by the first SCSI command, look up the corresponding relationship between the first-level virtual LUN and the LUN accessible to the user, or the first-level virtual LUN The corresponding relationship between the secondary virtual LUN and the user-accessible LUN in the virtual LUN, or the correspondence between the primary virtual LUN, the secondary LUN, and the user-accessible LUN , determining the user-accessible LUN to be accessed by the first SCSI command.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. .

Embodiment five

An embodiment of the present invention provides a data transmission method, which is suitable for the first SAN device in the storage system. The storage system includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, wherein the configuration of the LUN can be the same as Embodiment one or two are the same, referring to Fig. 5, the method includes:

Step 501: Configure the primary virtual LUN, the primary virtual LUN includes at least one secondary virtual LUN, each of the secondary virtual LUNs corresponds to a user-accessible LUN, and the user can access A LUN consists of logical units on the at least two storage area system devices.

Wherein, the user is connected to one of the SAN devices in the storage system.

Step 502: Receive a first SCSI command, the first SCSI command includes at least one of the number of the primary virtual LUN and the number of the secondary virtual LUN, and the first SCSI command also includes a read and write instruction.

Step 503: According to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried in the first SCSI command, look up the corresponding relationship between the first-level virtual LUN and the LUN accessible to the user, or the first-level virtual LUN The corresponding relationship between the secondary virtual LUN and the user-accessible LUN in the virtual LUN, or the correspondence between the primary virtual LUN, the secondary LUN, and the user-accessible LUN , determining the user-accessible LUN to be accessed by the first SCSI command.

Specifically, when searching, first determine the corresponding first-level virtual LUN and second-level virtual LUN according to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN in the SCSI command, and then search for the first-level virtual LUN according to the corresponding relationship The user-accessible LUN corresponding to the secondary virtual LUN, and finally determine the SAN device where the user-accessible LUN is located.

Step 504: When the SAN device where the found LUN is located is the first SAN device, execute the read and write command on the found LUN, and return the data block; when the found SAN device where the LUN is located is For other SAN devices in the storage system, the read and write instructions are forwarded to the SAN device where the found LUN is located, and the data block returned by the SAN device where the found LUN is located is received, and the returned data block is sent to the user.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. .

Embodiment six

An embodiment of the present invention provides a data transmission method, which is suitable for the first SAN device in the storage system. The storage system includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, wherein the configuration of the LUN can be the same as Embodiment one or two are the same, referring to Fig. 6, the method comprises:

Step 601: Receive a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual LUN and the number of the second-level virtual LUN, the second SCSI command also includes a query instruction, and the query instruction is used to request Device information of SAN devices.

In this embodiment, the user is connected to at least two SAN devices.

In this embodiment, each of the SAN devices stores the device information of all the SAN devices in the storage system, and the device information includes storing Internet Protocol IP addresses, authentication methods, user names and passwords.

Step 602: According to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried in the second SCSI command, look up the corresponding relationship between the first-level virtual LUN and the LUN accessible to the user, or the first-level virtual LUN The corresponding relationship between the secondary virtual LUN and the user-accessible LUN in the virtual LUN, or the correspondence between the primary virtual LUN, the secondary LUN, and the user-accessible LUN , determining the device information of the SAN device corresponding to the second SCSI command.

Further, the method may further include: returning the found device information to the user.

In this embodiment, in addition to data transmission through the first SAN device, the user can also directly perform data transmission with the directly connected SAN device. Before data transmission, the user needs to connect to the SAN device, including During the process of authentication and login, the user only needs to send the second SCSI command with a query command to the first SAN device to obtain the device information of the SAN device to be connected. The device information includes the authentication and login information. The automatic connection is completed without human input, which saves labor and facilitates the management of authentication and login information.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. ; At the same time, when the user is connected to the first SAN device, he is also connected to other SAN devices. At this time, the user can not only transmit data through the first SAN device, but also directly perform data transmission with the SAN device directly connected to himself. Before the transmission, the user needs to connect with the SAN device, including the process of authentication and login. In this process, the user only needs to send the second SCSI command with the query command to the first SAN device to obtain the SAN device to be connected. The device information of the device includes the authentication and login information, so as to complete the automatic connection without manual input, which saves labor and facilitates the management of authentication and login information.

Embodiment seven

An embodiment of the present invention provides a storage area system device. Referring to FIG. 7, the SAN device is in a storage system, the storage system includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, wherein the LUN configuration method Can be the same as Embodiment 1 or 2, the SAN equipment includes:

A receiving module 701, configured to receive a first SCSI command, where the first SCSI command includes at least one of the number of a primary virtual LUN and the number of a secondary virtual LUN;

The search module 702 is configured to search for the correspondence between the first-level virtual LUN and the user-accessible LUN according to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried in the first SCSI command, or the corresponding relationship between the first-level virtual LUN and the user-accessible LUN. The corresponding relationship between the secondary virtual LUN in the primary virtual LUN and the user-accessible LUN, or the relationship among the primary virtual LUN, the secondary LUN, and the user-accessible LUN and determine the user-accessible LUN to be accessed by the first SCSI command.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. .

Embodiment Eight

An embodiment of the present invention provides a storage area system device. Referring to FIG. 8 , the SAN device is in a storage system, the storage system includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, wherein the LUN configuration method Can be the same as Embodiment 1 or 2, the SAN equipment includes:

The receiving module 801 is configured to receive a first SCSI command, the first SCSI command includes at least one of the number of the first-level virtual LUN and the number of the second-level virtual LUN, and the first SCSI command also includes a read and write instruction;

The search module 802 is configured to search for the corresponding relationship between the first-level virtual LUN and the user-accessible LUN according to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried in the first SCSI command, or the The corresponding relationship between the secondary virtual LUN in the primary virtual LUN and the user-accessible LUN, or the relationship among the primary virtual LUN, the secondary LUN, and the user-accessible LUN Corresponding relationship, determine the user-accessible LUN to be accessed by the first SCSI command;

The processing module 803 is configured to execute the read and write instructions on the found LUN when the SAN device where the found LUN is located is the first SAN device, and return the data block; when the found LUN is located When the SAN device is other SAN devices in the storage system, forward the read and write instructions to the SAN device where the found LUN is located, and receive the data block returned by the SAN device where the found LUN is located, and send the returned data block to the user.

Specifically, when searching, first determine the corresponding first-level virtual LUN and second-level virtual LUN according to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN in the SCSI command, and then search for the first-level virtual LUN according to the corresponding relationship The user-accessible LUN corresponding to the secondary virtual LUN, and finally determine the SAN device where the user-accessible LUN is located.

In the embodiment of the present invention, the user is connected to the SAN device.

Further, the SAN equipment also includes:

The configuration module 804 is configured to configure the first-level virtual LUN, the first-level virtual LUN includes at least one second-level virtual LUN, each of the second-level virtual LUNs corresponds to a user-accessible LUN, the The user-accessible LUN is composed of logical units on the at least two storage area system devices.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. .

Embodiment nine

An embodiment of the present invention provides a storage area system device. Referring to FIG. 9 , the SAN device is in a storage system, the storage system includes at least two SAN devices, and the at least two SAN devices are interconnected in pairs, wherein the LUN configuration method Can be the same as Embodiment 1 or 2, the SAN equipment includes:

The receiving module 901 is configured to receive a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual LUN and the number of the second-level virtual LUN, the second SCSI command also includes a query instruction, and the query instruction Used to request device information of SAN devices.

The search module 902 is configured to search for the corresponding relationship between the first-level virtual LUN and the user-accessible LUN according to the number of the first-level virtual LUN and/or the number of the second-level virtual LUN carried in the second SCSI command, or the The corresponding relationship between the secondary virtual LUN in the primary virtual LUN and the user-accessible LUN, or the relationship among the primary virtual LUN, the secondary LUN, and the user-accessible LUN and determine the device information of the SAN device corresponding to the second SCSI command.

In this embodiment, the user is connected to at least two SAN devices.

In this embodiment, each of the SAN devices stores the device information of all the SAN devices in the storage system, and the device information includes storing Internet Protocol IP addresses, authentication methods, user names and passwords.

Further, the SAN device may further include: a processing module, configured to return the found device information to the user.

In this embodiment, in addition to data transmission through the first SAN device, the user can also directly perform data transmission with the directly connected SAN device. Before data transmission, the user needs to connect to the SAN device, including During the process of authentication and login, the user only needs to send the second SCSI command with a query command to the first SAN device to obtain the device information of the SAN device to be connected. The device information includes the authentication and login information. The automatic connection is completed without human input, which saves labor and facilitates the management of authentication and login information.

In the embodiment of the present invention, a first-level virtual logical unit is configured on a storage area system device, the first-level virtual logical unit includes at least one second-level virtual logical unit, and each of the second-level virtual logical units is connected to a user-accessible logical unit. Corresponding to the unit, the user-accessible logical unit is composed of the logical units on the at least two storage area system devices, and the correspondence between the first-level virtual logical unit and the second-level virtual logical unit and the user-accessible logical unit is configured relationship, when the user needs to access the logical unit accessible to the user, he only needs to carry the numbers of the first-level virtual logical unit and the second-level virtual logical unit. At the same time, the view obtained by the user is the view of the first-level virtual logical unit. Compared with In the prior art, the user view is single and concise; in addition, the embodiment of the present invention interconnects all SAN devices in the storage system in pairs, and each user only needs to connect to any SAN device in the storage system to access All SAN devices in the storage system prevent all users from being connected to one SAN device, and avoid the problem that when all users are connected to one SAN device, the resources of the SAN device will be occupied and the working performance of the SAN device will be affected. ; At the same time, when the user is connected to the first SAN device, he is also connected to other SAN devices. At this time, the user can not only transmit data through the first SAN device, but also directly perform data transmission with the SAN device directly connected to himself. Before the transmission, the user needs to connect with the SAN device, including the process of authentication and login. In this process, the user only needs to send the second SCSI command with the query command to the first SAN device to obtain the SAN device to be connected. The device information of the device includes the authentication and login information, so as to complete the automatic connection without manual input, which saves labor and facilitates the management of authentication and login information.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above embodiments can be completed by hardware, and can also be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium. The above-mentioned The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, and the like.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A storage system, characterized in that the storage system includes at least two storage area system devices, the at least two storage area system devices are interconnected in pairs, and each of the storage area system devices includes a plurality of logical unit, The at least two storage area system devices include a first storage area system device, a first-level virtual logical unit is configured on the first storage area system device, and the first-level virtual logical unit includes at least one second-level virtual logical unit, Each of the secondary virtual logical units corresponds to a user-accessible logical unit, and the user-accessible logical unit is composed of logical units on the at least two storage area system devices; The first storage area system device is configured with the corresponding relationship between the first-level virtual logical unit and the user-accessible logical unit, or the first storage area system device is configured with the first-level virtual logical unit The corresponding relationship between the secondary virtual logical unit and the logical unit accessible to the user, or the first storage area system device is configured with the primary virtual logical unit, the secondary logical unit and the user Correspondence among the three accessible logical units. 2. The system according to claim 1, wherein the first storage area system device is used for: receiving a first small computer system interface SCSI command, the first SCSI command including at least one of a primary virtual logical unit number and a secondary virtual logical unit number; According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the first SCSI command, look up the corresponding relationship of the system equipment configured in the first storage area, and determine what the first SCSI command requires The user-accessible logical unit of access. 3. The system according to claim 1, wherein each storage area system device stores device information of all storage area system devices in the storage system, and the device information includes storage Internet protocol IP addresses , authentication method, user name and password, or any combination thereof. 4. The system according to claim 3, wherein the first storage area system device is used for: receiving a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit, the second SCSI command also includes a query instruction, and the query instruction is used to request device information for storage area system devices; According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the second SCSI command, look up the corresponding relationship of the system equipment configured in the first storage area, and determine that the second SCSI command corresponds to device information of storage area system devices. 5. A data transmission method, characterized in that it is applicable to a first storage area system device in a storage system, the storage system includes at least two storage area system devices, and the at least two storage area system devices communicate with each other Even, the method includes: receiving a first small computer system interface SCSI command, the first SCSI command including at least one of a primary virtual logical unit number and a secondary virtual logical unit number; According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the first SCSI command, look up the corresponding relationship between the first-level virtual logical unit and the logical unit accessible to the user, or the one The corresponding relationship between the second-level virtual logical unit and the user-accessible logical unit in the first-level virtual logical unit, or the first-level virtual logical unit, the second-level logical unit, and the user-accessible logical unit The corresponding relationship among the three determines the user-accessible logical unit to be accessed by the first SCSI command. 6. The method according to claim 5, further comprising: Configuring the first-level virtual logical unit, the first-level virtual logical unit includes at least one second-level virtual logical unit, each of the second-level virtual logical units corresponds to a user-accessible logical unit, and the user The accessible logical units are composed of logical units on the at least two storage area system devices. 7. A storage area system device, characterized in that the storage area system device is in a storage system, the storage system includes at least two storage area system devices, and the at least two storage area system devices are interconnected in pairs , the storage area system equipment includes: The receiving module is configured to receive a first small computer system interface SCSI command, the first SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit; A search module, configured to search for a correspondence between the first-level virtual logical unit and user-accessible logical units according to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the first SCSI command , or the corresponding relationship between the second-level virtual logical unit in the first-level virtual logical unit and the logical unit accessible to the user, or the first-level virtual logical unit, the second-level logical unit and the user The correspondence among the three accessible logical units determines the user-accessible logical unit to be accessed by the first SCSI command. 8. The storage area system device according to claim 7, wherein the storage area system device further comprises: A configuration module, configured to configure the first-level virtual logical unit, the first-level virtual logical unit includes at least one second-level virtual logical unit, each of the second-level virtual logical units is respectively associated with a user-accessible logical unit Correspondingly, the logic unit accessible to the user is composed of logic units on the at least two storage area system devices. 9. A data transmission method, characterized in that it is applicable to the first storage area system device in the storage system, the storage system includes at least two storage area system devices, and the at least two storage area system devices communicate with each other Even, the method includes: receiving a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit, the second SCSI command also includes a query instruction, and the query instruction is used to request device information for storage area system devices; According to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the second SCSI command, look up the corresponding relationship between the first-level virtual logical unit and the logical unit accessible to the user, or the one The corresponding relationship between the second-level virtual logical unit and the user-accessible logical unit in the first-level virtual logical unit, or the first-level virtual logical unit, the second-level logical unit, and the user-accessible logical unit The correspondence between the three determines the device information of the storage area system device corresponding to the second SCSI command. 10. A storage area system device, characterized in that the storage area system device is in a storage system, and the storage system includes at least two storage area system devices, and the at least two storage area system devices are interconnected in pairs , the storage area system equipment includes: The receiving module is configured to receive a second SCSI command, the second SCSI command includes at least one of the number of the first-level virtual logical unit and the number of the second-level virtual logical unit, the second SCSI command also includes a query instruction, the The above query command is used to request the device information of the storage area system device; A search module, configured to search for the correspondence between the first-level virtual logical unit and the user-accessible logical unit according to the number of the first-level virtual logical unit and/or the number of the second-level virtual logical unit carried by the second SCSI command , or the corresponding relationship between the second-level virtual logical unit in the first-level virtual logical unit and the logical unit accessible to the user, or the first-level virtual logical unit, the second-level logical unit and the user The correspondence among the three accessible logical units determines the device information of the storage area system device corresponding to the second SCSI command.