WO2017054733A1

WO2017054733A1 - Processing method and device for storage hosting and switching

Info

Publication number: WO2017054733A1
Application number: PCT/CN2016/100593
Authority: WO
Inventors: 蒋林超
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-30
Filing date: 2016-09-28
Publication date: 2017-04-06
Also published as: CN106557276B; CN106557276A

Abstract

A processing method and device for storage hosting and switching. The method comprises: a storage gateway provides a storage resource logical unit number (LUN) to a client end (S102); the storage gateway forwards to a storage device a request instruction for obtaining a storage resource LUN attribute received from the client end (S104); and the storage gateway forwards to the client end the storage resource LUN attribute returned according to the request instruction from the storage device, wherein the storage resource LUN attribute is used by the client end to combine the storage resource LUN obtained from the storage gateway and a storage resource LUN obtained from the storage device into one multi-path storage resource LUN, such that two paths are formed, and a service is online switched to a path accessing the storage resource LUN of the storage device via the storage gateway (S106). The present invention addresses the problem in which a defect occurs in an online storage gateway if online switching is supported at a client end, thereby realizing online switching for the client end.

Description

Storage takeover, switching processing method and device

Technical field

The present invention relates to the field of communications, and in particular to a storage takeover, handover processing method and apparatus.

Background technique

Storage gateways can protect and manage storage devices and are widely used. To enhance the security of data on the storage device, the storage gateway needs to take over the storage resources of the storage device, which helps to increase management and security.

The existing storage gateway generally adopts such a takeover method, and the storage gateway first discovers the storage resources of the storage device by establishing a connection with the storage device. Some of the discovered storage resources already have data, and some are empty. For a storage resource that has data, the storage gateway establishes a virtual storage resource mapped to the storage resource. The virtual storage resource is created in the same way as a local storage resource logical unit number (LUN) process. The LUN is set to be the same as the original storage resource that is taken over by the storage gateway. The storage gateway provides the LUN to the client. The storage gateway converts the client's access to the virtual storage resource LUN into access to the remote storage resource LUN that is taken over. This storage takeover method does not destroy the original data of the storage resource. However, the problem is that the attributes of the virtual storage resource LUN are generated by the storage gateway, such as the serial number. These LUN attributes are used by the client to determine whether the two LUNs can be merged into a multipath disk. The client learns from the storage gateway. The attributes of the LUN and the LUN learned directly from the storage device are inconsistent, which affects the generation of the multipath disk. The client cannot generate the multipath disk. The client cannot perform the multipath switch and cannot connect the service from the storage device online. Incoming to switch to access from the storage gateway.

The LUN attribute of the virtual storage LUN created by the storage gateway is inconsistent with that of the original storage device. This affects the problem that the two LUNs learned by the client cannot be merged into a multipath disk. The storage gateway sends a protocol for obtaining LUN attributes. The command is applied to the storage device. The attributes of the virtual storage LUN are filled with the obtained real LUN attribute values. However, such a scheme has difficulty in compatibility, because the storage device taken over by the storage gateway will be different from different vendors and different models. If the protocol command for requesting the LUN attribute has multiple formats and the request LUN attribute protocol command of the format initiated by the storage gateway, some storage devices do not necessarily support the response. Accordingly, the content of some storage devices may be special. Format, the storage gateway does not necessarily support correct parsing. The storage gateway first takes the attributes of the takeover LUN to achieve the notification that the attributes of the LUN are true. The takeover mode can only be supported for specific and limited storage devices.

In view of the problem that the storage gateway is online and the client is online switched, there is no effective solution for the problem.

Summary of the invention

The embodiment of the invention provides a storage takeover, a switching processing method and a device, so as to at least solve the problem that the storage gateway online line supports the online switching of the client in the related art.

According to an aspect of the embodiments of the present invention, a storage takeover processing method is provided, including: a storage gateway provides a storage resource logical unit number LUN to a client; and the storage gateway obtains a storage resource LUN attribute of the received client. The requesting instruction is forwarded to the storage device; the storage gateway forwards the storage resource LUN attribute returned by the storage device according to the request instruction to the client, where the storage resource LUN attribute is used by the client Consolidating the storage resource LUN obtained from the storage gateway and the storage resource LUN obtained from the storage device into one multi-path storage resource LUN, forming a storage resource LUN directly to the storage device and from the storage gateway to the storage The two paths of the storage resource LUN of the device are switched online to the path of the storage resource LUN that is accessed from the storage gateway to the storage device.

Further, before the storage gateway provides the storage resource LUN to the client, the method further includes: the storage gateway establishing a connection with the storage device; and the storage gateway acquiring the storage of the storage device by using the established connection. A resource LUN; the storage gateway creates a virtual storage resource LUN that has a mapping relationship with a storage resource LUN that stores data.

Further, the storage gateway provides the storage resource LUN to the client, the storage gateway establishes a connection with the client, and the storage gateway receives the request message for requesting the storage resource LUN sent by the client; The storage gateway obtains the storage resource LUN through the virtual storage resource LUN according to the request message, and provides the obtained storage resource LUN to the client.

Further, the method further includes: the storage gateway performing encryption processing on the storage resource LUN.

Further, the storage gateway forwards the received request for obtaining the storage resource LUN attribute to the storage device by the storage gateway, including: the universal drive interface of the storage gateway through a small computer system interface (SCSI) Forwarding the request request of the received client to obtain the storage resource LUN attribute to the storage device.

According to another aspect of the present invention, a handover processing method is provided, including: forwarding, by a storage gateway, a received request for a client to obtain a storage resource logical unit number LUN attribute to a storage device, and After the storage device forwards the storage resource LUN attribute returned by the storage command to the client, the client merges the storage resource LUN obtained by the storage gateway and the storage resource LUN obtained from the storage device into one multipath. Storing a resource LUN, forming a storage resource LUN directly to the storage device and two paths from the storage gateway to a storage resource LUN of the storage device; the client switches the service online to the storage gateway Path to the storage resource LUN of the storage device.

According to another aspect of the present invention, a storage takeover processing device is further provided, which is applied to a storage gateway, and includes: a providing module, configured to provide a storage resource logical unit number LUN to the client; and the first forwarding module is set to And the second forwarding module is configured to forward the storage resource LUN attribute returned from the storage device according to the request instruction to the client, and the requesting instruction of the storage resource LUN attribute is forwarded to the storage device. End, wherein the storage resource LUN attribute is used by the client to merge the storage resource LUN obtained from the storage gateway and the storage resource LUN obtained from the storage device into one multi-path storage resource LUN, forming a direct a storage resource LUN of the storage device and from the storage gateway to the storage device The two paths of the storage resource LUN of the storage device switch the service online to the path of the storage resource LUN that is accessed from the storage gateway to the storage device.

Further, the device further includes: establishing a connection module, configured to establish a connection with the storage device; and acquiring, configured to acquire a storage resource LUN of the storage device by using the established connection; creating a module, setting to create and save A storage resource LUN with data has a mapping relationship of virtual storage resource LUNs.

Further, the providing module includes: establishing a connection unit, configured to establish a connection with the client; and receiving, configured to receive a request message for requesting a storage resource LUN sent by the client; and acquiring, configured to The request message obtains the storage resource LUN through the virtual storage resource LUN, and provides the obtained storage resource LUN to the client.

According to still another aspect of the embodiments of the present invention, a handover processing apparatus is further provided, which is applied to a client, and includes: a merge module, configured to acquire, at a storage gateway, a request for a storage resource logical unit number LUN attribute from a received client After the instruction is forwarded to the storage device, and the storage resource LUN attribute returned from the storage device according to the request instruction is forwarded to the client, the storage resource LUN obtained from the storage gateway and the storage obtained from the storage device are stored. The resource LUNs are merged into one multi-path storage resource LUN, and two paths are formed directly to the storage resource LUN of the storage device and the storage resource LUN from the storage gateway to the storage device; Switching to the path of the storage resource LUN accessed from the storage gateway to the storage device.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:

The storage gateway provides a storage resource logical unit number LUN to the client; the storage gateway forwards the received request for the client to obtain the storage resource LUN attribute to the storage device; the storage gateway will use the storage device according to the storage device The storage resource LUN attribute returned by the requesting instruction is forwarded to the client, where the storage resource LUN attribute is used by the storage resource LUN obtained by the client from the storage gateway and the storage resource LUN obtained from the storage device. Merging into a multi-path storage resource LUN to form a storage directly to the storage device The two paths of the storage resource LUN and the storage resource LUN from the storage gateway to the storage device are switched online to the path of the storage resource LUN accessed from the storage gateway to the storage device.

According to the embodiment of the present invention, the storage gateway provides the storage resource logical unit number LUN to the client; the storage gateway forwards the received request for the client to obtain the storage resource LUN attribute to the storage device; the storage gateway The storage resource LUN attribute returned from the storage device according to the request instruction is forwarded to the client, where the storage resource LUN attribute is used by the client to obtain a storage resource LUN and a slave from the storage gateway. The storage resource LUNs obtained by the storage device are merged into one multi-path storage resource LUN, and the two paths of the storage resource LUN directly from the storage device and the storage resource LUN from the storage gateway to the storage device are formed, and the service is online. Switching to the path of the storage resource LUN that is accessed from the storage gateway to the storage device solves the problem that the storage gateway online supports the online switching of the client and has defects, so that the online switching of the client can be implemented.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method of processing a storage takeover according to an embodiment of the present invention;

2 is a flowchart of a handover processing method according to an embodiment of the present invention;

3 is a block diagram of a storage takeover processing apparatus in accordance with an embodiment of the present invention;

4 is a block diagram 1 of a storage takeover processing apparatus in accordance with a preferred embodiment of the present invention;

Figure 5 is a block diagram 2 of a storage takeover processing apparatus in accordance with a preferred embodiment of the present invention;

6 is a block diagram of a handover processing apparatus according to an embodiment of the present invention;

7 is a structural block diagram of a storage gateway taking over a storage device according to an embodiment of the present invention;

8 is a flow chart of a method for a storage gateway to take over a storage device in accordance with an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

The embodiment of the present invention provides a storage takeover processing method. FIG. 1 is a flowchart of a storage takeover processing method according to an embodiment of the present invention.

Step S102, the storage gateway provides a storage resource logical unit number LUN to the client;

Step S104: The storage gateway forwards the received request for the client to obtain the storage resource LUN attribute to the storage device.

Step S106: The storage gateway forwards the storage resource LUN attribute returned by the storage device according to the request instruction to the client, where the storage resource LUN attribute is used by the client to obtain the storage resource LUN and the slave device from the storage gateway. The storage resource LUNs obtained by the storage device are merged into one multi-path storage resource LUN, and two paths are directly formed to the storage resource LUN of the storage device and the storage resource LUN from the storage gateway to the storage device, and the service is switched online to the slave. The storage gateway accesses the path of the storage resource LUN of the storage device.

The storage gateway forwards the storage resource LUN attribute returned by the storage device according to the request instruction to the client directly, that is, the storage gateway LUN attribute that is obtained by the storage device to obtain the storage resource LUN attribute is forwarded to the client. The implementation of the transmission method does not require modification of the format of the request instruction. This method ensures that the attributes of the two LUNs seen by the client are consistent, and the multi-path software can combine the two LUNs into one multi-path disk. Can support multi-path switching. The request command for requesting LUN attributes in a format initiated by the storage gateway is avoided. Some storage devices do not support the response. Accordingly, the content of some storage devices may be in a special format, and the storage gateway may not support correct resolution. The problem.

Further, before the storage gateway provides the storage resource LUN to the client, the storage gateway establishes a connection with the storage device; the storage gateway acquires the storage resource LUN of the storage device through the established connection, and creates a mapping with the storage resource LUN storing the data. The virtual storage resource LUN of the relationship.

Further, the storage gateway providing the storage resource LUN to the client may include: storing the The storage gateway establishes a connection with the client; the storage gateway receives the request message for requesting the storage resource LUN sent by the client; the storage gateway obtains the storage resource LUN through the virtual storage resource LUN according to the request message, and acquires the obtained storage The resource LUN is provided to the client.

To improve the security of the storage resource, the storage gateway can also encrypt the storage resource LUN. When the encrypted storage resource LUN is obtained by the client, decrypt the storage resource LUN and provide the decrypted storage resource LUN to the client. You can do it.

Further, the storage gateway may forward the received request for obtaining the storage resource LUN attribute to the storage device by using the universal drive interface of the small computer system interface SCSI.

The embodiment of the present invention further provides a handover processing method, and FIG. 2 is a flowchart of a handover processing method according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

Step S202: The storage gateway forwards the received request for the storage resource logical unit number LUN attribute to the storage device, and forwards the storage resource LUN attribute returned by the storage device according to the request instruction to the client. The client merges the storage resource LUN obtained from the storage gateway with the storage resource LUN obtained from the storage device into a multi-path storage resource LUN, forming a storage resource LUN directly to the storage device and from the storage gateway to the storage device. Two paths of the storage resource LUN;

Step S204: The client switches the service online to the path of the storage resource LUN that is accessed from the storage gateway to the storage device.

The embodiment of the present invention provides a storage takeover processing device, which is applied to a storage gateway. FIG. 3 is a block diagram of a storage takeover processing device according to an embodiment of the present invention.

Providing a module 32, configured to provide a storage resource logical unit number LUN to the client;

The first forwarding module 34 is configured to forward the received request for acquiring the storage resource LUN attribute to the storage device by the client;

The second forwarding module 36 is configured to forward the storage resource LUN attribute returned from the storage device according to the request instruction to the client, where the storage resource LUN attribute is used by the client to obtain the storage resource from the storage gateway. LUNs and storage resources obtained from storage devices The LUNs are merged into a multi-path storage resource LUN, and two paths are formed directly to the storage resource LUN of the storage device and the storage resource LUN from the storage gateway to the storage device, and the service is switched online to access from the storage gateway. The path of the storage resource LUN of the storage device.

4 is a block diagram of a storage takeover processing apparatus according to a preferred embodiment of the present invention. As shown in FIG. 4, the apparatus further includes:

Establishing a connection module 42 configured to establish a connection with the storage device;

The obtaining module 44 is configured to obtain a storage resource LUN of the storage device by using the established connection;

The creating module 46 is configured to create a virtual storage resource LUN that has a mapping relationship with the storage resource LUN that stores the data.

5 is a block diagram 2 of a storage takeover processing apparatus in accordance with a preferred embodiment of the present invention. As shown in FIG. 5, the providing module 32 includes:

Establishing a connection unit 52, configured to establish a connection with the client;

The receiving unit 54 is configured to receive a request message for requesting the storage resource LUN sent by the client;

The obtaining unit 56 is configured to obtain the storage resource LUN through the virtual storage resource LUN according to the request message, and provide the obtained storage resource LUN to the client.

The embodiment of the present invention further provides a switching processing apparatus, which is applied to a client. FIG. 6 is a block diagram of a switching processing apparatus according to an embodiment of the present invention. As shown in FIG. 6, the method includes:

The merging module 62 is configured to: forward, by the storage gateway, the received request for obtaining the storage resource logical unit number LUN attribute to the storage device, and forward the storage resource LUN attribute returned by the storage device according to the request instruction to the storage device After the client, the storage resource LUN obtained from the storage gateway and the storage resource LUN obtained from the storage device are merged into one multi-path storage resource LUN to form a storage resource LUN directly to the storage device and from the storage gateway to the storage. Two paths of the storage resource LUN of the device;

The switching module 64 is configured to switch the service online to access the storage device from the storage gateway Path to the storage resource LUN.

The embodiments of the present invention are further described below in conjunction with specific embodiments.

The embodiment of the present invention can support the storage connection of the online switching of the client, and can solve the purpose of adding a storage gateway to secure the storage data in the storage application, but the storage gateway does not support the online switching of the client, and the client needs to interrupt the in-transit service first. In order to switch the service to the storage gateway, it can support the client to switch online, and can continue to secure storage data. FIG. 7 is a structural block diagram of a storage gateway taking over a storage device according to an embodiment of the present invention. As shown in FIG. 7, the technical solution of the embodiment of the present invention is applied to a storage gateway to provide a transparent transmission and security reinforcement function. The storage gateway first establishes a connection with the storage device and discovers the storage resources of the storage device. The storage gateway creates virtual storage resources and their mappings for storage resources that store data. After the client and the storage gateway are connected, the first step of the client is to initiate a request LUN reporting command to the storage gateway. The storage gateway resolves the request command sent by the client to request the LUN reporting command, and the storage gateway advertises all the qualified LUNs. To the client. The client then queries the LUN attribute information of each LUN obtained. The storage gateway resolves the request command sent by the client to obtain the LUN attribute. The storage gateway does not directly respond, forwards the content of the request command to the storage device, and waits for the response from the storage device. When receiving the response from the storage device, , forward the response to the client. In this process, the storage gateway is located between the client and the storage device in a forwarder role. In other processes, the storage gateway does not act as a forwarder. When the storage gateway recognizes that the client command is about requesting read and write LUN data or the storage device responds to the read and write LUN data, the storage gateway performs security data processing.

Transparent transmission of commands for obtaining LUN attributes is the focus of this technical solution. The implementation of command transparent transmission is based on technology, and the interface provided by the SCSI universal driver can achieve transparent transmission. After the storage gateway transparently transmits the command to obtain the LUN attribute of the client, the client multi-path software can combine the LUN learned from the storage gateway and the LUN learned from the storage storage device into one multi-path LUN to form two paths. The LUN to the storage device. With this condition, the client can switch the service being performed with the storage device to the storage gateway and then to the storage device. Therefore, the storage gateway does not need to interrupt the client service.

FIG. 8 is a flowchart of a method for a storage gateway to take over a storage device according to an embodiment of the present invention. As shown in FIG. 8, the method includes the following steps:

S802. The storage gateway establishes a connection with the storage device, and initiates a takeover LUN request to the storage device.

S804, the storage device notifies the storage gateway of the taken over LUN;

S806. The storage gateway creates a virtual LUN and takes over the LUN mapping.

S808, the client establishes a connection with the storage gateway, and initiates a report LUN request;

S810. The storage gateway advertises a LUN to the client.

S812: The client and the storage gateway initiate a request for acquiring a LUN attribute.

S814, the storage gateway determines that the LUN requested by the client is a virtual LUN created in the foregoing, and finds a LUN on the storage device mapped thereto;

S816, the storage gateway adjusts the SCSI universal drive interface, and forwards the LUN attribute request to the storage device.

S818. The storage device responds to the storage gateway with a LUN attribute.

S820: The storage gateway forwards the LUN attribute of the storage device to the client in response.

S822: The client multi-path software finds that the attributes of the LUN are consistent with the attributes of the LUN learned from the storage device, and generates a multi-path disk.

S824, the client performs multipath handover, and the service is switched to the access mode from the storage gateway.

S826, the client initiates an I/O (Input/Output) request for reading and writing the stored data to the storage gateway;

S828: The storage gateway performs security processing on the stored data of the read/write I/O request initiated by the client.

S830. The storage gateway initiates an execution I/O request to the storage device.

S832. The storage device performs an I/O request.

Through the embodiment of the present invention, the function of securing LUN data security can be achieved without fail. The purpose of transparently taking over LUNs is to support online switching of clients.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

Step S1, the storage gateway provides a storage resource logical unit number LUN to the client;

Step S2: The storage gateway forwards the received request for obtaining the storage resource LUN attribute of the client to the storage device.

In step S3, the storage gateway forwards the storage resource LUN attribute returned by the storage device according to the request instruction to the client, where the storage resource LUN attribute is used by the client to obtain the storage resource LUN and the slave device from the storage gateway. The storage resource LUNs obtained by the storage device are merged into one multi-path storage resource LUN, and two paths are directly formed to the storage resource LUN of the storage device and the storage resource LUN from the storage gateway to the storage device, and the service is switched online to the slave. The storage gateway accesses the path of the storage resource LUN of the storage device.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included in the present invention. Within the scope of protection.

Industrial applicability

The embodiment of the present invention is applied to the field of communications, and solves the problem that the storage gateway online supports the online switching of the client in the related art, so that the online switching of the client can be implemented.

Claims

A storage takeover processing method includes:

The storage gateway provides a storage resource logical unit number LUN to the client;

The storage gateway forwards the received request for obtaining the storage resource LUN attribute to the storage device by the client;

The storage gateway forwards the storage resource LUN attribute returned by the storage device according to the request instruction to the client, where the storage resource LUN attribute is used by the client to be obtained from the storage gateway. The storage resource LUN and the storage resource LUN obtained from the storage device are merged into one multi-path storage resource LUN, and two storage resource LUNs directly from the storage device and storage resource LUNs from the storage gateway to the storage device are formed. The path switches the service online to the path of the storage resource LUN that is accessed from the storage gateway to the storage device.
The method of claim 1, wherein before the storing gateway provides the storage resource LUN to the client, the method further includes:

The storage gateway establishes a connection with the storage device;

Obtaining, by the storage gateway, the storage resource LUN of the storage device by using the established connection;

The storage gateway creates a virtual storage resource LUN that has a mapping relationship with a storage resource LUN that stores data.
The method of claim 2, wherein the providing a storage resource LUN to the client by the storage gateway comprises:

The storage gateway establishes a connection with the client;

Receiving, by the storage gateway, the requested storage resource LUN sent by the client Ask for news;

The storage gateway obtains the storage resource LUN through the virtual storage resource LUN according to the request message, and provides the obtained storage resource LUN to the client.
The method of claim 2 or 3, wherein the method further comprises:

The storage gateway performs encryption processing on the storage resource LUN.
The method of claim 1, wherein the forwarding, by the storage gateway, the received request for the client to obtain the storage resource LUN attribute to the storage device includes:

The storage gateway forwards the received request for obtaining the storage resource LUN attribute to the storage device by using the universal drive interface of the small computer system interface SCSI.
A switching processing method includes:

Forwarding, by the storage gateway, the received request for obtaining the storage resource logical unit number LUN attribute to the storage device, and forwarding the storage resource LUN attribute returned by the storage device according to the request instruction to the client The client merges the storage resource LUN obtained from the storage gateway with the storage resource LUN obtained from the storage device into a multi-path storage resource LUN, forming a storage resource LUN directly to the storage device and from the storage Two paths from the gateway to the storage resource LUN of the storage device;

The client switches the service online to a path of the storage resource LUN that is accessed from the storage gateway to the storage device.
A storage takeover processing device is applied to a storage gateway, including:

Providing a module, configured to provide a storage resource logical unit number LUN to the client;

The first forwarding module is configured to forward the received request for obtaining the storage resource LUN attribute by the client to the storage device;

a second forwarding module, configured to forward, to the client, a storage resource LUN attribute returned from the storage device according to the request instruction, where the storage resource LUN attribute is used by the client from the storage The storage resource LUN obtained by the gateway and the storage resource LUN obtained from the storage device are merged into one multi-path storage resource LUN, and the storage resource LUN directly to the storage device and the storage resource LUN from the storage gateway to the storage device are formed. The two paths switch the service online to the path of the storage resource LUN that is accessed from the storage gateway to the storage device.
The apparatus of claim 7 wherein said apparatus further comprises:

Establishing a connection module, configured to establish a connection with the storage device;

Obtaining a module, configured to acquire a storage resource LUN of the storage device by using the established connection;

Create a module, set to create a virtual storage resource LUN that has a mapping relationship with the storage resource LUN that holds the data.
The apparatus of claim 8 wherein said providing module comprises:

Establishing a connection unit, configured to establish a connection with the client;

a receiving unit, configured to receive a request message for requesting a storage resource LUN sent by the client;

The obtaining unit is configured to obtain the storage resource LUN through the virtual storage resource LUN according to the request message, and provide the obtained storage resource LUN to the client.
A switching processing device is applied to a client, including:

The merging module is configured to forward, to the storage device, a request for the storage device to obtain the storage resource logical unit number LUN attribute, and forward the storage resource LUN attribute returned by the storage device according to the request instruction to the storage device After the client, the storage resource LUN obtained from the storage gateway and the storage resource LUN obtained from the storage device are merged into one multi-path storage resource LUN, forming a storage resource LUN directly to the storage device and from the storage LUN Storing two paths of the gateway to the storage resource LUN of the storage device;

The switching module is configured to switch the service online to a path of the storage resource LUN accessed from the storage gateway to the storage device.