WO2015180538A1

WO2015180538A1 - Method and device for reading and writing data, and storage system

Info

Publication number: WO2015180538A1
Application number: PCT/CN2015/076661
Authority: WO
Inventors: 雷舒莹; 常胜; 郭海涛; 张羽
Original assignee: 华为技术有限公司
Priority date: 2014-05-29
Filing date: 2015-04-15
Publication date: 2015-12-03
Also published as: CN103984662A; CN103984662B

Abstract

Disclosed are a method and device for reading and writing data, and a storage system. In the present invention, read or write commands are separated from data, so that forwarding of the read or write commands is controlled by a controller, and data to be read or written is not transmitted through the controller but is directly transmitted by a front-end device and a back-end storage device, and therefore the transmission efficiency is improved, and burdens on the controller are reduced.

Description

Method and device for reading and writing data, storage system

Technical field

The present invention relates to the field of information processing, and in particular, to a method and device for reading and writing data, and a storage system.

Background technique

As shown in FIG. 1, the storage system includes a front end device, a control device, and a back end storage device. The front-end device is connected to the control device through the front-end network, and the different control devices are connected to the back-end storage device through the back-end network by controlling the network connection; the front-end device may include a host, and the control device may include a controller, The cache interfaces with the Host Bus Adapter (HBA).

At present, the front-end network generally uses a fiber channel (English: Fiber Channel, abbreviation: FC), Ethernet (English: Ethernet, abbreviation: Eth) and other networks, mainly through the switch (English: Switch) will belong to the front-end device host and control equipment The front end card is interconnected. The control network generally uses a Peripheral Component Interconnect Express (PCIe) network. The back-end network generally uses a Serial Attached SCSI (SAS) cable to connect the control device to the disk enclosure and cascade the disk enclosures to control access to the back-end storage devices.

In an existing storage system, data transmission between the front-end device and the back-end storage device must pass through the front-end network, the control network, and the back-end network, and must also be transmitted through the controller, between the current end device and the back-end storage device. When the amount of data transmitted is large, the controller may be unable to process in time, resulting in a decrease in data transmission efficiency. In addition, since the front-end network, the control network, and the back-end network respectively use different types of networks, network maintenance is inconvenient and maintenance costs are high.

Summary of the invention

It is an object of the present invention to provide a method and apparatus for reading or writing data, and a storage system. The invention separates the read or write command from the data, so that the read or write command is controlled and forwarded by the controller, and the data to be read or the data to be written is not transmitted by the controller, but by the front-end device and The back-end storage device directly performs data transmission, which improves transmission efficiency and reduces the burden on the controller.

A first aspect of the present invention provides a method of reading data, comprising:

Receiving, by the network, the first read information sent by the front end device, where the first read information includes a read command and logical interface address information of a disk of the backend storage device, where the data to be read by the read command is stored in the On the disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected through the network;

The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information of the disk;

The control device sends the second read information to the backend storage device according to the address information of the backend storage device, where the second read information includes the read command, the address information of the front end device, and the The physical interface address information of the disk is such that the backend storage device receives the second read information sent by the control device by using the network, and searches for the disk according to the physical interface address information of the disk. The data to be read, and the data to be read, which is found by the network, are sent to the front-end device according to the address information of the front-end device.

With reference to the first aspect of the present invention, in a first possible implementation manner of the first aspect, the control device acquires, according to the logical interface address information of the disk, address information of the backend storage device to which the disk belongs and the Physical interface address information of the disk, including:

The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information and the mapping relationship information of the disk, where the mapping relationship information is used to indicate Corresponding relationship between the logical interface address information of the disk and the physical interface address information of the disk and the address information of the backend storage device.

With the first aspect of the present invention or the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect, before the control device receives the first read information sent by the front end device by using the network, The method also includes:

The control device sends a broadcast packet to the backend storage device, where the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes Address information of the backend storage device and physical interface address information of a disk of the backend storage device;

Receiving, by the control device, the backend storage device information reported by the backend storage device, and establishing logical interface address information of the disk, physical interface address information of the disk, and address information of the backend storage device Correspondence.

With reference to the first aspect of the present invention, the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the control device receives, by using a network, the first read information sent by the front end device, include:

The control device receives, by using the network, the first read information sent by the front end device in the form of a multimedia access control MAC frame;

The control device sends the second read information to the backend storage device according to the address information of the backend storage device, including:

The control device sends the second read information to the backend storage device in the form of the MAC frame according to the address information of the backend storage device.

With reference to the first aspect of the present invention or any one of the first to the third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the network includes any one of the following networks: a fiber channel network, Ethernet, fast peripherals interconnect standard PCIe network.

A second aspect of the present invention provides a method of reading data, including:

The backend storage device receives, by using a network, second read information sent by the control device, where the second read information includes a read command, address information of the front end device, and physical interface address information of the disk; the data to be read by the read command is stored in the The control device, the front-end device, and the back-end storage device are interconnected by the network;

The backend storage device searches for data to be read in the disk according to physical interface address information of the disk, and searches for data to be read through the network according to address information of the front-end device. Sent to the front end device.

With reference to the second aspect of the present invention, in a first possible implementation manner of the second aspect, before the receiving, by the back end storage device, the second read information sent by the control device by using the network, the method further includes:

When the backend storage device is booted, the backend storage device acquires a physical interface of the disk Address information;

When the backend storage device receives the broadcast packet sent by the control device, the backend storage device information is reported to the control device, where the backend storage device information includes the address information and the location of the backend storage device. The physical interface address information of the disk of the backend storage device.

With reference to the second aspect of the present invention or the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the backend storage device receives, by using the network, the second sent by the control device Read information, including:

Receiving, by the backend storage device, the second read information sent by the control device in the form of a multimedia access control MAC frame by using the network;

The back-end storage device sends, to the front-end device, the data to be read by the network, according to the address of the front-end device, including:

The backend storage device sends the data to be read by the network to the front end device in the form of the MAC frame according to the address of the front end device.

With reference to the second aspect of the present invention, the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the network includes any one of the following networks: a fiber channel network, an Ethernet network Fast peripheral interconnect standard PCIe network.

A third aspect of the present invention provides a method of reading data, including:

The front-end device sends the first read information to the control device through the network; wherein the first read information includes a read command and logical interface address information of a disk of the back-end storage device, and the data to be read by the read command is stored in the The control device, the front-end device, and the back-end storage device are interconnected by the network;

Receiving, by the network, the first read information sent by the front-end device, and acquiring the address information of the back-end storage device to which the disk belongs and the physicality of the disk according to the logical interface address information of the disk The interface address information, and the second read information is sent to the backend storage device according to the address information of the backend storage device, where the second read information includes the read command, address information of the front end device, and Physical interface address information of the disk;

Receiving, by the backend storage device, the second read message sent by the control device by using the network And searching for the data to be read in the disk according to the physical interface address information of the disk, and sending, according to the address information of the front-end device, the found data to be read through the network to The front end device.

With reference to the third aspect of the present invention, in a first possible implementation manner of the third aspect, the control device acquires, according to the logical interface address information of the disk, address information of the backend storage device to which the disk belongs and the Physical interface address information of the disk, including:

With reference to the third aspect of the present invention or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the control device receives, by using the network, the first read sent by the front end device Before the information, the method further includes:

Receiving, by the backend storage device, the broadcast packet sent by the control device, and reporting the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device and the Physical interface address information of the disk of the end storage device;

With reference to the third aspect of the present invention, the first or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the control device receives, by using a network, the first read information sent by the front end device, include:

With reference to the third aspect of the present invention or any one of the first to the third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the network includes any one of the following networks: a fiber channel network, Ethernet, fast peripherals interconnect standard PCIe network.

A fourth aspect of the present invention provides a method of writing data, including:

The control device receives, by using a network, first write information sent by the front-end device; the first write information includes a write command and logical interface address information of a disk of the back-end storage device; the control device, the front-end device, and the back end The storage devices are interconnected by the network;

The control device sends the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, address information of the front end device, and the disk The physical interface address information is such that the backend storage device receives the second write information sent by the control device through the network, and finds the disk according to the physical interface address information of the disk, and generates First response information, and transmitting, by the network, the first response information to the control device according to address information of the front end device; the first response information indicating a disk pair reception of the backend storage device a response to a write command initiated by the front end device;

Receiving, by the control device, first response information that is sent by the backend storage device through a network;

After receiving the first response information, the control device generates second response information according to the first response information and the address information of the backend storage device, where the second response information includes the first response information. And address information of the backend storage device;

The control device sends the second response information to the front-end device, so that the front-end device receives the second response information, and passes the data to be written through the network according to the address information of the back-end storage device. Sending to the backend storage device, so that the backend storage device receives the desired write Data and write the data to be written to the disk.

With reference to the fourth aspect of the present invention, in a first possible implementation manner of the fourth aspect, before the control device receives the first response information that is sent by the backend storage device by using the network, the method further includes:

Receiving, by the network, the first write information sent by the front-end device, where the first write information includes the write command and logical interface address information of a disk of the back-end storage device;

The control device sends the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, the address information of the front end device, and the disk The physical interface address information is such that the backend storage device receives the second write information sent by the control device through the network, and finds the disk according to the physical interface address information of the disk, and generates The first response information, and the first response information is sent to the control device through the network according to the address information of the front end device.

With reference to the first possible implementation manner of the fourth aspect of the present invention, in a second possible implementation manner of the fourth aspect, the control device receives the first response information that is sent by the backend storage device by using the network, including :

Receiving, by the control device, first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network;

Receiving, by the control device, the first write information sent by the front end device by using the network, including:

The control device receives, by using the network, first write information that is sent by the front end device in the form of a multimedia access control MAC frame.

With reference to the fourth aspect of the present invention, the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the network includes any one of the following networks: a fiber channel network, an Ethernet network Fast peripheral interconnect standard PCIe network.

A fifth aspect of the present invention provides a method of writing data, including:

The front-end device sends first write information to the control device through the network, where the first write information includes a write And the logical interface address information of the disk of the backend storage device, so that the control device receives the first write information, and obtains the address of the backend storage device to which the disk belongs according to the logical interface address information of the disk. And the physical interface address information of the disk; and sending, according to the address information of the backend storage device, the second write information to the backend storage device, where the second write information includes the write command and the The address information of the front-end device and the physical interface address information of the disk, so that the back-end storage device receives the second write information sent by the control device through the network, and according to the physical interface address of the disk Information, the disk is found, and the first response information is generated, and the first response information is sent to the control device by using the network according to the address information of the front-end device; the first response information is represented by a response of the disk of the backend storage device to the received write command initiated by the front end device; the control device according to the first Generating second response information according to the information and the address information of the backend storage device, and sending the second response information to the front end device; the second response information includes first response information and the backend storage device Address information; the control device, the front-end device, and the back-end storage device are interconnected by the network;

The front-end device receives the second response information sent by the control device by using the network, and sends the data to be written to the back-end storage device according to the address information of the back-end storage device, so that the The end storage device receives the data to be written and writes the data to be written to the disk.

With reference to the fifth aspect of the present invention, in a first possible implementation manner of the fifth aspect, the front end device, by using the network, the second response information that is sent by the control device, includes:

Receiving, by the front end device, the second response information that is sent by the control device in the form of a multimedia access control MAC frame by using the network;

Sending, by the front-end device, the first write information to the control device by using the network, including:

The front-end device sends the first write information to the control device in the form of a multimedia access control MAC frame through the network.

With reference to the fifth aspect of the present invention or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the network includes any one of the following networks: a fiber channel network, an Ethernet, and a shortcut Set up an interconnected standard PCIe network.

A sixth aspect of the present invention provides a method of writing data, including:

Receiving, by the network device, the second write information sent by the control device, where the second write information includes the write command, address information of the front end device, and physical interface address information of the disk of the backend storage device; The control device, the front end device, and the backend storage device are interconnected by the network;

The backend storage device searches for the disk according to the physical interface address information of the disk, and generates first response information; the first response information indicates that the disk of the backend storage device receives the received The response of the write command initiated by the front-end device;

Transmitting, by the backend storage device, the first response information to the control device by using the network, where the first response information indicates that the disk of the backend storage device initiates writing to the received front end device In response to the command, the disk of the backend storage device is used to write data to be written by the write command;

After the backend storage device sends the first response information to the control device through the network, the backend storage device receives, by the network, data to be written by the front end device sent by the front end device, and The data to be written is written to the disk.

With reference to the sixth aspect of the present invention, in a first possible implementation manner of the sixth aspect, the back-end storage device sends the first response information to the control device by using the network, including:

The backend storage device sends the first response information to the control device in the form of a multimedia access control MAC frame through the network;

Receiving, by the backend storage device, the second write information sent by the control device by using the network, including:

The backend storage device receives, by the network, the second write information that is sent by the control device in the form of a multimedia access control MAC frame.

With reference to the sixth aspect of the present invention or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the network includes any one of the following networks: a Fibre Channel network, an Ethernet, and a shortcut Set up an interconnected standard PCIe network.

A seventh aspect of the present invention provides a method of writing data, including:

The front-end device sends first write information to the control device through the network, where the first write information includes a write And logical interface address information of the disk of the backend storage device; the control device, the front end device, and the backend storage device are interconnected by the network;

Receiving, by the control device, the first write information, and acquiring, according to the logical interface address information of the disk, address information of the backend storage device to which the disk belongs and physical interface address information of the disk; The address information of the backend storage device sends the second write information to the backend storage device, where the second write information includes the write command, address information of the front end device, and physical interface address information of the disk ;

The backend storage device receives the second write information sent by the control device by using the network, and finds the disk according to physical interface address information of the disk, and generates first response information, and according to the Address information of the front-end device, the first response information is sent to the control device by using the network; the first response information indicates that the disk of the back-end storage device initiates the received front-end device The response of the write command;

The control device generates second response information according to the first response information and the address information of the backend storage device, and sends the second response information to the front end device; the second response information includes the first Response information and address information of the backend storage device;

The front-end device receives the second response information sent by the control device by using the network; after obtaining the second response information, the data to be written is passed according to the address information of the back-end storage device. Sending the network to the backend storage device;

The backend storage device receives the data to be written and writes the data to be written to the disk.

With reference to the seventh aspect of the present invention, in a first possible implementation manner of the seventh aspect, before the receiving, by the control device, the first write information sent by the front end device, the method further includes:

Receiving, by the backend storage device, the broadcast packet sent by the control device, and reporting the backend storage device information to the control device;

With reference to the seventh aspect of the present invention or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the control device receives, by the back end storage device, the first sent by the network Response information, including:

Receiving, by the control device, the first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network;

Receiving, by the control device, the first write information that is sent by the front end device in the form of a multimedia access control MAC frame by using the network;

Receiving, by the network device, the second response information sent by the control device by using the network, including:

Receiving, by the front end device, the second response information that is sent by the control device in a form of a multimedia access control MAC frame by using the network;

Sending, by the front-end device, the first write information to the control device in the form of a multimedia access control MAC frame through the network;

The backend storage device sends the first response information to the control device by using the network, including:

In combination with the seventh aspect of the present invention, the first or second possible implementation of the seventh aspect, in the seventh party In a third possible implementation manner, the network includes any one of the following networks: a Fibre Channel network, an Ethernet, and a fast peripheral interconnect standard PCIe network.

An eighth aspect of the present invention provides a control device, including:

a receiving unit, configured to receive, by using a network, first read information sent by the front end device, where the first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data to be read by the read command Stored on a disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

a processing unit, configured to acquire, according to logical interface address information of the disk in the first read information received by the receiving unit, address information of a backend storage device to which the disk belongs and a physical interface of the disk Address information;

a sending unit, configured to send the second read information to the backend storage device according to the address information of the backend storage device acquired by the processing unit, where the second read information includes the read command and the The address information of the front-end device and the physical interface address information of the disk, so that the back-end storage device receives the second read information sent by the control device through the network, and according to the physical interface address of the disk And searching for data to be read in the disk, and sending, by the network, the found data to be read to the front-end device according to the address information of the front-end device.

With reference to the eighth aspect of the present invention, in a first possible implementation manner of the eighth aspect, the processing unit is configured to: according to the logical interface address information of the disk in the first read information received by the receiving unit, Obtaining the address information of the backend storage device to which the disk belongs and the physical interface address information of the disk, including:

And the information about the address of the backend storage device to which the disk belongs and the physical interface address information of the disk are obtained according to the logical interface address information and the mapping relationship information of the disk, where the mapping relationship information is used to indicate the Correspondence between the logical interface address information of the disk and the physical interface address information of the disk and the address information of the backend storage device.

With reference to the eighth aspect of the present invention or the first possible implementation manner of the eighth aspect, in a second possible implementation manner of the eighth aspect, the sending unit is further configured to receive, by the receiving unit, the front end device, Before the first read information, sending a broadcast packet to the backend storage device, where the broadcast packet is used The backend storage device is configured to report the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device and a physicality of a disk of the backend storage device Interface address information;

The receiving unit is further configured to receive the backend storage device information reported by the backend storage device;

The processing unit is further configured to: after the receiving unit receives the backend storage device information reported by the backend storage device, establish logical interface address information of the disk and physical interface address information of the disk and the The correspondence between the address information of the backend storage device.

A ninth aspect of the present invention provides a backend storage device, including:

a receiving unit, configured to receive, by using a network, second read information sent by the control device, where the second read information includes a read command, address information of the front end device, and physical interface address information of the disk; and data storage to be read by the read command On the disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

a searching unit, configured to: after the receiving unit receives the second read information, search for data to be read in the disk according to physical interface address information of the disk;

a sending unit, configured to send the searched data to be read by the network to the front end according to the address information of the front end device after the searching unit searches for the data to be read in the disk device.

With reference to the ninth aspect of the present invention, in a first possible implementation manner of the ninth aspect, the back-end storage device further includes: an acquiring unit, where the acquiring unit is configured to receive, by the receiving unit, the network Before the second read information sent by the device is controlled, when the backend storage device is started, acquiring physical interface address information of the disk;

The sending unit is further configured to: when the receiving unit receives the broadcast packet sent by the control device, report the backend storage device information to the control device, where the backend storage device information includes the backend storage device Address information and physical interface address information of the disk of the backend storage device.

With reference to the ninth aspect of the present invention or the first possible implementation manner of the ninth aspect, in the second possible implementation manner of the ninth aspect, the sending unit is configured to receive the control device by using the network Media access control second read information sent in the form of a MAC frame;

The sending unit is configured to send, by using the network, the searched data to be read by the network to the front end device in the form of the MAC frame according to an address of the front end device.

A tenth aspect of the present invention provides a front end device, including:

a sending unit, configured to send first read information to the control device over the network; wherein the first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data storage to be read by the read command On the disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

a receiving unit, configured to receive, by the network, the data to be read sent by the backend storage device after the sending unit sends the first read information to the control device by using the network.

With the tenth aspect of the present invention, in a first possible implementation manner of the tenth aspect, the sending unit, configured to send the first read information to the control device by using the network, includes:

And transmitting, by using a network, the first read information in a form of a multimedia access control MAC frame to the control device.

An eleventh aspect of the present invention provides a storage system including the control device as described above, the backend storage device as described above, and the front end device as described above, the control device, the front end device, and the backend storage Devices are interconnected through the same network.

In conjunction with the eleventh aspect of the present invention, in a first possible implementation manner of the eleventh aspect, the network includes any one of the following: a Fibre Channel network, an Ethernet, and a fast peripheral interconnect standard PCIe network.

A twelfth aspect of the present invention provides a control device, including:

Receiving unit, processing unit and transmitting unit,

The receiving unit is configured to receive, by using a network, first write information sent by the front end device; the first write information includes a write command and logical interface address information of a disk of the backend storage device; the control device, the front end device, and The backend storage devices are interconnected by the network;

The processing unit is configured to acquire, according to the logical interface address information of the disk that is included in the first response information received by the receiving unit, address information of a backend storage device to which the disk belongs and a physical interface address of the disk Information

The sending unit is configured to send the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, address information of the front end device, and the The physical interface address information of the disk is such that the backend storage device receives the second write information sent by the control device through the network, and searches for the disk according to the physical interface address information of the disk. And generating first response information, and sending, by the network, the first response information to the control device according to the address information of the front end device; the first response information indicating a disk of the backend storage device a response to a received write command initiated by the front end device;

The receiving unit is further configured to receive first response information that is sent by the backend storage device by using the network;

The processing unit generates second response information according to the first response information and address information of the backend storage device, where the second response information includes first response information and address information of the backend storage device;

The sending unit is further configured to send the second response information to the front end device, so that the front end device receives the second response information, and sends the data to be written according to the address information of the backend storage device. Giving the backend storage device such that the backend storage device receives the data to be written and writes the data to be written to the disk.

In a first possible implementation manner of the twelfth aspect, the transmitting unit is further configured to: before the receiving unit receives the first write information sent by the front end device by using the network, Sending a broadcast packet to the backend storage device, where the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes the Address information of the end storage device and physical interface address information of the disk of the backend storage device;

The receiving unit is further configured to receive the backend storage device information reported by the backend storage device, and establish logical interface address information of the disk and physical interface address information of the disk and the backend storage device. Correspondence of address information.

With reference to the twelfth aspect or the first possible implementation manner of the twelfth aspect, in the second possible implementation manner of the twelfth aspect, the receiving unit is further configured to receive the back end storage device Determining, by the network, the first response information sent in the form of a multimedia access control MAC frame;

The sending unit is further configured to receive, by using the network, first write information that is sent by the front end device in a multimedia access control MAC frame format.

A thirteenth aspect of the present invention provides a front end device, including:

a sending unit and a receiving unit, wherein the sending unit is configured to send, by using a network, first write information to the control device, where the first write information includes a write command and logical interface address information of a disk of the backend storage device, so that the The control device receives the first write information, and obtains address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information of the disk; And storing the second write information to the backend storage device, where the second write information includes the write command, address information of the front end device, and physical interface address information of the disk, so that The backend storage device receives the second write information sent by the control device by using the network, and finds the disk according to physical interface address information of the disk, and generates first response information, and according to the Address information of the front-end device, sending the first response information to the control device by using the network; The information indicates a response of the disk of the backend storage device to the received write command initiated by the front end device; the control device generates a second according to the first response information and the address information of the backend storage device Responding to the information, and transmitting the second response information to the front end device; the second response information includes first response information and address information of the backend storage device; the control device, the front end device, and the back end The storage devices are interconnected by the network;

The receiving unit is configured to receive, by using the network, second response information sent by the control device;

The sending unit is further configured to: after the receiving unit receives the second response information, send the data to be written to the backend storage device according to the address information of the backend storage device, so that the back end The storage device receives the data to be written and writes the data to be written to the disk.

In a first possible implementation manner of the thirteenth aspect, the receiving unit is further configured to receive, by using the network, the second that is sent by the control device in a multimedia access control MAC frame format. Response information

The sending unit is further configured to send, by using the network, the first write information to the control device in the form of a multimedia access control MAC frame.

A fourteenth aspect of the present invention provides a backend storage device, including: a sending unit, a processing unit, and a receiving unit,

The receiving unit is configured to receive, by using a network, the second write information sent by the control device, where the second write information includes the write command, address information of the front end device, and a physical interface address of the disk of the backend storage device. Information; the control device, the front end device, and the backend storage device are interconnected by the network;

The processing unit is configured to find the disk according to the physical interface address information of the disk that is received by the receiving unit, and generate first response information; the first response information indicates that the backend storage device is a response of the disk to the received write command initiated by the front end device;

The sending unit is configured to send the first response information to the control device by using the network, where the first response information indicates that the disk of the backend storage device initiates writing to the received front-end device. The response of the command;

The receiving unit is further configured to: after the sending unit sends the first response information to the control device by using a network, receive, by the network, data to be written by the front end device sent by the front end device, and The data to be written is written to the disk.

With the fourteenth aspect of the present invention, in a first possible implementation of the fourteenth aspect, the sending unit is further configured to send, by using the network, the first response information to a multimedia access control MAC frame The control device;

The receiving unit is further configured to receive, by using the network, the second write information that is sent by the control device in a multimedia access control MAC frame format.

A fifteenth aspect of the present invention provides a storage system, comprising: the control device according to the twelfth aspect, the first or second aspect of the twelfth aspect, the thirteenth aspect or the thirteenth aspect The front-end device provided on the one hand and the first aspect of the fourteenth aspect or the fourteenth aspect, wherein the control device, the front-end device and the back-end storage device are interconnected through the same network.

In conjunction with the fifteenth aspect of the present invention, in a first possible implementation manner of the fifteenth aspect, the network includes any one of the following: a Fibre Channel network, an Ethernet, and a fast peripheral interconnect standard PCIe network.

In the present invention, the storage system uses the same network, and the control device, the front-end device, and the back-end storage The storage device transmits information through the same network, supports massive expansion, and is easy to maintain. Moreover, the present invention separates the read or write command from the data, so that the read or write command is controlled and forwarded by the controller, and the data to be read or written is The data is directly transmitted by the front-end device and the back-end storage device, which improves the transmission efficiency and reduces the burden on the controller.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention.

1 is a schematic structural view of a conventional storage system;

2 is a schematic diagram of information interaction of devices in a storage system when data is read;

3 is a schematic flowchart of a method for reading data according to an embodiment of the present invention;

4 is a schematic flowchart of a partial step of a method for reading data according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a frame according to an embodiment of the present disclosure;

6 is a schematic flowchart of a method for reading data according to an embodiment of the present invention;

7 is a schematic flowchart of a partial process of a method for reading data according to an embodiment of the present invention;

8 is a schematic diagram of information interaction of devices in a storage system when data is written;

FIG. 9 is a schematic flowchart diagram of a method for writing data according to an embodiment of the present invention;

FIG. 10 is a schematic flowchart diagram of a method for writing data according to an embodiment of the present invention;

FIG. 11 is a schematic flowchart diagram of a method for writing data according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a front end device according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a control device according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a backend storage device according to an embodiment of the present disclosure;

15 is a schematic structural diagram of a control device according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of a backend storage device according to an embodiment of the present disclosure;

17 is a schematic structural diagram of a front end device according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a control device according to an embodiment of the present invention;

19 is a schematic structural diagram of a front end device according to an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of a backend storage device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.

As shown in FIG. 2, FIG. 2 illustrates a storage system to which the method of the embodiment of the present invention is applied. The storage system includes: a front-end device, a control device, and a back-end storage device, where the control device, the front-end device, and the back-end storage device are interconnected through the same network; the network may be supported by a Fibre Channel network, an Ethernet, or a PCIe network. A network that stores data exchanges. The front-end device includes a host, and the control device includes a controller, a cache, and a network interface. The back-end storage device may be a cluster of disks (English: Just a Bunch Of Disks, abbreviated as JBOD), and may specifically include a network interface and a plurality of cascaded disks. .

The invention is described below by way of example methods.

As shown in FIG. 3, an embodiment of the present invention provides a method for reading data, including:

201. The control device receives, by using a network, first read information sent by the front end device.

The first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data to be read by the read command is stored on a disk of the backend storage device; the control device, The front end device and the back end storage device are interconnected through the same network.

In step 201, the backend storage device may be a disk cluster device. The read command can be a small computer system interface command. The logical interface address information is used to represent a logical interface address; the logical interface address information may be a logical serial connection small computer system interface address information, and the logical serial connection small computer system interface address information indicates a logical serial connection small computer system interface address . The physical interface address information is used to indicate a physical interface address; the physical interface address information may be a physical serial connection small computer system interface address information, and the physical serial connection small computer system interface address information indicates a physical serial connection small computer system interface address .

202. The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information of the disk.

Mapping information may be pre-configured in the control device, where the mapping relationship information is used to represent logical interface address information of the disk and physical interface address information of the disk and the backend storage device Correspondence of address information. After receiving the first read information, the control device may obtain the address information of the backend storage device to which the disk belongs and the physical interface address information of the disk according to the logical interface address information and the mapping relationship information of the disk. .

203. The control device sends the second read information to the backend storage device according to the address information of the backend storage device.

The second read information includes the read command, address information of the front end device, and physical interface address information of the disk. The step 203 is configured to enable the backend storage device to receive the second read information sent by the control device by using the network, and search for the to-be read in the disk according to the physical interface address information of the disk. Data, and according to address information of the front-end device, the discovered data to be read is sent to the front-end device through the network.

In this embodiment, the read command is controlled and forwarded by the control device, and after receiving the read command, the backend storage device directly sends the data to be read to the front-end device without forwarding by the controller, thereby improving the data. Transmission efficiency reduces the burden on the controller.

As shown in FIG. 4, before the control device receives the first read information sent by the front-end device, the method further includes:

301, the control device sends a broadcast packet to the backend storage device, where the broadcast packet is used to enable the backend storage device to report the backend storage device information to the control device, where the backend storage device The information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device.

302. The control device receives the backend storage device information reported by the backend storage device, and establishes logical interface address information of the disk and physical interface address information of the disk and the backend storage device. Correspondence of address information.

Steps

301 and 302 describe the process of the controller discovering the disks of the backend storage device and the backend storage device after the backend storage device is booted, and the process of generating the mapping relationship information.

In the embodiment of the present invention, the transmission protocol between the front-end device, the control device, and the back-end storage device may be a customized private protocol, and the private protocol is loaded in the multimedia access control (English: Media Access Control, abbreviation: On the MAC) protocol, data is transmitted directly through the MAC layer.

As shown in FIG. 5, the MAC frame includes three parts: a frame header, a data packet, and a frame tail.

The frame header includes: a destination MAC address, a source MAC address, and a frame type; wherein the upper layer of the frame type flag uses a proprietary protocol. The destination MAC address can be allocated 6 bytes, the source MAC address can be allocated 6 bytes, and the frame type can be allocated 2 bytes.

The data packet is a private protocol frame. The private protocol frame contains: the destination SAS address, the SCSI command, and the Next-target MAC address. The Next-target MAC address indicates the target device address that the target device should send next, such as: the front-end device to the control device. Send a read command; the control device forwards the read command to the backend storage device, and fills in the front-end device MAC address in the Next-target MAC address; the back-end storage device receives the data frame, and parses out the Next-target MAC address is the front-end device MAC address. The address is then filled into the destination MAC address in the MAC frame and the data frame is sent to the headend device.

The end of the frame contains: the frame check sequence. The frame check sequence can be allocated 4 bytes.

In this embodiment, the SCSI command included in the private protocol frame may be a read command, and the destination SAS address may be a logical interface address of the disk or a physical interface address of the disk.

Therefore, in the embodiment of the present invention, the control device may receive the first read information sent by the front end device in the form of a multimedia access control MAC frame through the network; the control device may perform the second read according to the address information of the backend storage device. Information is sent to the backend storage device in the form of the MAC frame.

As shown in FIG. 6, the embodiment of the present invention further provides another method for reading data, including:

401. The backend storage device receives, by using the network, second read information sent by the control device. The second read information includes a read command, an address of the front end device, and a physical interface address of the disk; the data to be read by the read command is stored on a disk of the backend storage device; the control device and the The front-end device and the back-end storage device are interconnected through the same network.

In step 401, the physical interface address information includes physical serial connection small computer system interface address information. The physical serial connection small computer system interface address information can be used to represent the physical serial connection small computer system interface address. The backend storage device may receive, by the network, second read information that is sent by the control device in the form of a multimedia access control MAC frame. The backend storage device may be a disk cluster device.

402. The backend storage device searches for the disk according to a physical interface address of the disk. The data to be read.

Specifically, after the backend storage device receives the second read information, if the read command is a small computer system interface command, the small computer system interface command is translated into a serial connection small computer system interface. a command; the backend storage device searches for data to be read in the disk according to the serial connection small computer system interface command and a physical interface address of the disk.

403. The backend storage device sends, by using the network, the searched data to be read by the network according to an address of the front end device.

Specifically, the backend storage device may send, by using the network, the data to be read by the network to the front end device in the form of the MAC frame according to the address of the front end device.

As shown in FIG. 7, before the backend storage device receives the second read information sent by the control device by using the network, the method further includes:

501. When the backend storage device is started, the backend storage device acquires physical interface address information of the disk.

502. When the backend storage device receives the broadcast packet sent by the control device, report the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device. And physical interface address information of the disk of the backend storage device.

Steps

501 and 502 describe the process of discovering the disk and reporting the backend storage device information to the control device when the backend storage device is booted.

As shown in FIG. 8, the embodiment of the present invention further provides a method for reading data, including:

Receiving, by the network, the first read information sent by the front-end device, and acquiring the address information of the back-end storage device to which the disk belongs and the physicality of the disk according to the logical interface address information of the disk The interface address information, and the second read information is sent to the backend storage device according to the address information of the backend storage device, where the second read information includes the read command and the Address information of the front end device and physical interface address information of the disk;

The backend storage device receives the second read information sent by the control device by using the network, and searches for data to be read in the disk according to physical interface address information of the disk, and according to the The address information of the front-end device is sent to the front-end device by the network to find the data to be read.

Optionally, the control device acquires, according to the logical interface address information of the disk, the address information of the backend storage device to which the disk belongs and the physical interface address information of the disk, including:

Optionally, before the receiving, by the control device, the first read information sent by the front-end device, the method further includes:

Optionally, the control device receives, by using a network, the first read information sent by the front-end device, including:

The control device sends the second read information to the back according to the address information of the backend storage device End storage devices, including:

Optionally, the network includes any one of the following networks: a Fibre Channel network, an Ethernet, and a fast peripheral interconnect standard PCIe network.

As shown in FIG. 9, an embodiment of the present invention further provides a method for writing data, including:

601. The control device receives, by using a network, first write information sent by the front end device.

Specifically, the control device receives, by using a network, first write information that is sent by the front-end device in the form of a multimedia access control MAC frame. The first write information includes the write command and logical interface address information of a disk of the backend storage device.

602. The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information of the disk.

The logical interface address information includes logical serial connection small computer system interface address information, and the physical interface address information includes physical serial connection small computer system interface address information.

603. The control device sends the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, the address information of the front end device, and the The physical interface address information of the disk.

Step 603 is executed to enable the backend storage device to receive the second write information sent by the control device by using the network, and find the disk according to the physical interface address information of the disk, and generate a first response. And transmitting, by the network, the first response information to the control device according to the address information of the front end device.

Steps 601 to 603 describe a process in which the front-end device initiates a write data operation, and the control device receives the first write information sent by the front-end device and causes the back-end storage device to issue the first response information.

604. The control device receives first response information that is sent by the backend storage device by using the network.

Specifically, the control device receives the first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network. The first response information indicates that the disk of the backend storage device responds to the received write command initiated by the front end device, and the backend saves The disk of the storage device is used to write data to be written by the write command; the control device, the front-end device and the back-end storage device are interconnected through the same network. The write command is a small computer system interface command. The backend storage device includes a disk cluster device.

605. After receiving the first response information, the control device sends the second response information to the front end device, where the second response information includes the first response information and the backend storage device. Address information.

Step 605 is executed to enable the front-end device to receive the second response information, obtain the first response information and address information of the back-end storage device, and obtain the first response information and the back-end storage. After the address information of the device is sent, the data to be written is sent to the backend storage device according to the address information of the backend storage device, so that the backend storage device receives the data to be written, and The data to be written is written to the disk.

Optionally, before the receiving, by the control device, the first write information sent by the front-end device, the method further includes:

As shown in FIG. 10, an embodiment of the present invention further provides a method for writing data, including:

701. The front-end device sends the first write information to the control device by using a network.

Specifically, the front-end device may send the first write information to the control device in the form of a multimedia access control MAC frame through the network. The first write information includes a write command and logical interface address information of a disk of the backend storage device, so that the control device receives the first write information, and according to And obtaining, by the logical interface address information of the disk, the address information of the backend storage device to which the disk belongs and the physical interface address information of the disk; and sending the second write information according to the address information of the backend storage device For the backend storage device, the second write information includes the write command, address information of the front end device, and physical interface address information of the disk, so that the backend storage device receives the network through the network The second write information sent by the control device, and searching for the disk according to the physical interface address information of the disk, and generating first response information, and passing the network according to the address information of the front-end device Transmitting the first response information to the control device; the first response information indicating a response of the disk of the backend storage device to the received write command initiated by the front end device; Decoding the first response information and the address information of the backend storage device, generating second response information, and sending the second response information to the front Apparatus; the second response in response to address information comprises a first information storage device and said rear end; the control device, the front end and the rear storage device via the internetworking device. The network includes any of the following networks: a Fibre Channel network, an Ethernet, and a fast peripheral interconnect standard PCIe network.

702. The front-end device receives, by using a network, second response information sent by the control device.

Specifically, the front-end device receives, by using the network, second response information that is sent by the control device in the form of a MAC frame. The second response information includes first response information and address information of the backend storage device; the first response information indicates that the disk of the backend storage device sends a write command initiated by the front end device. In response, the disk of the backend storage device is used to write data to be written by the write command. The backend storage device includes a disk cluster device.

703. Obtain, according to the second response information, the first response information and address information of the backend storage device.

704. After obtaining the first response information and the address information of the backend storage device, send the data to be written to the backend storage device according to the address information of the backend storage device.

Step 704 is executed to cause the backend storage device to receive the data to be written and write the data to be written to the disk.

Optionally, the logical interface address information includes logical serial connection small computer system interface address information, and the physical interface address information includes physical serial connection small computer system interface address information.

Optionally, the write command is a small computer system interface command.

As shown in FIG. 11, an embodiment of the present invention further provides a method for writing data, including:

801. The backend storage device receives, by using a network, the second write information sent by the control device.

Specifically, the backend storage device may receive, by using the network, the second write information that is sent by the control device in a multimedia access control MAC frame format. The second write information includes the write command, address information of the front-end device, and physical interface address information of the disk of the back-end storage device; the control device, the front-end device, and the back-end storage device pass through Network interconnection.

802. The backend storage device searches for the disk according to the physical interface address information of the disk, and generates first response information.

The first response information indicates a response of the disk of the backend storage device to the received write command initiated by the front end device.

803. The backend storage device sends the first response information to the control device over the network.

Specifically, the backend storage device sends the first response information to the control device in the form of a MAC frame through the network. The first response information indicates that the disk of the backend storage device responds to the received write command initiated by the front end device, and the disk of the backend storage device is used to write data to be written by the write command; The control device, the front end device and the back end storage device are interconnected through the same network.

804. After the backend storage device sends the first response information to the control device by using the network, the backend storage device receives, by the network, the data to be written by the front-end device sent by the front-end device, and writes the desired The data is written to the disk.

Optionally, the write command is a small computer system interface command.

Optionally, the backend storage device comprises a disk cluster device.

An embodiment of the present invention further provides a method for writing data, including:

The front-end device sends first write information to the control device through the network, where the first write information includes a write command and logical interface address information of a disk of the back-end storage device; the control device, the front-end device Interconnected with the backend storage device through the network;

Receiving, by the control device, the backend storage device information reported by the backend storage device, and constructing Corresponding relationship between the logical interface address information of the disk and the physical interface address information of the disk and the address information of the backend storage device.

Optionally, the receiving, by the control device, the first response information sent by the backend storage device by using the network, includes:

The invention will now be described in more detail by way of examples.

In the following embodiments of the invention, the same network accessed by the front-end device, the control device, and the back-end storage device is an Ethernet network. As shown in FIG. 12, the front-end device includes a host, and the host includes an application layer, an operating system layer, and a network adapter that are sequentially connected, and the network adapter includes an Ethernet interface, an adaptation layer, and a bus interface that are sequentially connected, and the bus interface is accessed. System layer. As shown in FIG. 13, the control device includes a processor, a memory, an adaptation layer, and an Ethernet interface connected to the adaptation layer, and the processor is respectively connected to the memory and the adaptation layer. As shown in FIG. 14, the backend storage device is a disk cluster device, and the disk cluster device includes an Ethernet interface, an adaptation layer, and a disk that are sequentially connected.

Before performing data reading, the embodiment of the present invention includes three parts, the first part is a disk cluster discovery disk, the second part is a control device discovering a disk cluster and a disk in a disk cluster, and the third part is a host discovery controller and a controller. Controlled disk.

The first part can specifically include:

When the disk of the disk cluster device is started, the SAS address is automatically reported to the adaptation layer of the disk cluster, and the adaptation layer establishes the disk SAS address table. See Table 1:

	Physical SAS addressPhysical SAS address
	Physical SAS addressPhysical SAS address	11	SAS addr0 SAS addr0
22	SAS addr1SAS addr1	11	SAS addr0 SAS addr0

Table 1 Disk SAS Address Table

The second part can specifically include:

The control device discovers the disks in the disk cluster and the disk cluster;

After the disk cluster is booted, the disk mounted below is scanned;

The control device sends a broadcast packet to each disk cluster, and reports that the disk in each disk cluster is reported;

Each disk clusters response information, and the response information includes a MAC address of the disk cluster and a disk SAS address table in the disk cluster;

The control device adaptation layer records the SAS address reported to the disk and virtualizes the disk. The virtual disk is also numbered according to the SAS address mode, and the real disk and virtual disk are created. The mapping relationship and the MAC address of the disk cluster to which they belong, as shown in Table 2.

	Logic SAS addressLogic SAS address	Physical SAS addressPhysical SAS address	JBOD MAC addressJBOD MAC address
	Logic SAS addressLogic SAS address	Physical SAS addressPhysical SAS address	JBOD MAC addressJBOD MAC address	11	Logic SAS addr10Logic SAS addr10	Phy SAS addr0Phy SAS addr0	JBOD MAC addr0 JBOD MAC addr0
22	Logic SAS addr11Logic SAS addr11	Phy SAS addr1Phy SAS addr1	JBOD MAC addr0JBOD MAC addr0	11	Logic SAS addr10Logic SAS addr10	Phy SAS addr0Phy SAS addr0	JBOD MAC addr0 JBOD MAC addr0

Table 2 Control device disk address and JBOD address mapping table

The third part can specifically include:

The host side configures a controllable MAC address of the control device and establishes a connection;

The host sends a command to the control device to report the controllable disk;

The disk returns a response message, and the response message includes a virtual disk SAS address;

The host adds the disk to the operating system according to the number of the quaternary <host:channel:id:lun>.

At the same time, a mapping table of the quaternion, the virtual disk SAS address, and the control device MAC address is established. The mapping relationship table is shown in Table 3:

	host:channel:id:lunHost:channel:id:lun	Logic SAS addressLogic SAS address	Controller MAC addressController MAC address
	host:channel:id:lunHost:channel:id:lun	Logic SAS addressLogic SAS address	Controller MAC addressController MAC address	11	0:02:00:000:02:00:00	SAS addr0SAS addr0	Contr MAC addr0Contr MAC addr0
22	0:02:01:000:02:01:00	SAS addr1SAS addr1	Contr MAC addr0Contr MAC addr0	11	0:02:00:000:02:00:00	SAS addr0SAS addr0	Contr MAC addr0Contr MAC addr0

Table 3 Mapping table of quaternion, control device address and disk address

The flow of reading data in this embodiment is as follows:

As shown in FIG. 2, the broken lines 1-4 in FIG. 2 illustrate the flow of reading data. The front end device in FIG. 2 includes a host, the control device includes a controller, and the back end storage device includes a JBOD.

1 The host sends a read command to the controller: the host's network adapter receives the read data SCSICommod, and the query table 3 finds the destination's logic SAS address and controller MAC address. The host's network adapter fills the Command frame with the logic SAS address and SCSI Commond, and then encapsulates the Command frame in the MAC frame and sends it to the corresponding controller.

2 The controller sends a read command to the JBOD: the adaptation layer of the controller receives the MAC frame sent by the host, and the adaptation layer of the controller parses out the SCSI Commond and the logic SAS address, and the query table 2 finds Corresponding JBOD MAC address and physical SAS address; The adaptation layer of the controller packs the physical SAS address, the host MAC address, and the SCSI Commond into a Command frame, and then encapsulates the Command frame in the MAC frame and sends it to the corresponding JBOD.

3JBOD sends data to the host through the network: the adaptation layer of JBOD receives the MAC frame sent by the controller, the adaptation layer of JBOD parses out the SCSI Commond, physical SAS address and the host MAC address; the adaptation layer of JBOD translates the SCSI Commond into SAS Command, forwarded to the corresponding disk; the disk returns data to the adaptation layer of JBOD, and the adaptation layer of JBOD packs the data into a DATA frame and encapsulates it in a MAC frame, where the target MAC address is the host MAC address, which will be encapsulated The subsequent data is sent directly to the host through the network.

The 4JBOD sends an execution completion response to the controller and the host respectively: the JBOD adaptation layer first packs the disk response information into a Response frame, and then encapsulates the Response frame in the MAC frame and sends it to the controller and the host respectively.

As shown in FIG. 8, the dotted lines 1-6 in FIG. 8 illustrate the flow of writing data. The front end device in FIG. 8 includes a host, the control device includes a controller, and the back end storage device includes a JBOD.

1 The host sends a write command to the controller: the host's network adapter receives the SCSI Commod that writes the data, the query table 3 finds the destination's logic SAS address and the controller MAC address; the primary network adapter fills the logic SAS address and the SCSI Commond into the Command frame. The Command frame is then encapsulated in a MAC frame and sent to the corresponding controller.

2 The controller sends a write command to the JBOD: the controller adaptation layer receives the MAC frame, parses out the SCSI Commond and the logic SAS address, and the query table 2 finds the corresponding JBOD MAC address and the physical SAS address; the controller adaptation layer will be the physical SAS Address, SCSI Commond is packaged into a Command frame, and then the Command frame is encapsulated in a MAC frame and sent to the corresponding JBOD.

3JBOD responds to the controller by waiting for Ready: JBOD's adaptation layer receives the MAC frame sent by the controller, and the JBOD adaptation layer parses out the SCSI Commond and physical SAS address; and translates the SCSI Commond into SAS Commond and forwards it to disk. The disk is replied to the adaptation layer XFER_RDY of JBOD, and the adaptation layer of JBOD packs XFER_RDY into a Response frame and encapsulates it in a MAC frame and sends it to the corresponding controller.

4 The controller sends a response to the host: the adaptation layer of the controller receives the MAC sent by the JBOD. Frame, the adaptation layer of the controller parses out the XFER_RDY response, packs the XFER_RDY and JBOD MAC address into a Response frame, and encapsulates it in a MAC frame and sends it to the host.

5 The host sends the data to the JBOD: the adaptation layer of the host receives the MAC frame sent by the controller, and the adaptation layer of the host parses the XFER_RDY response, packs the data to be written into a DATA frame, and encapsulates it in the MAC frame and sends it to the JBOD. .

The 6JBOD sends a response to the completion of the execution to the controller and the host: the JBOD adaptation layer receives the MAC frame, and the JBOD adaptation layer parses the write data and forwards it to the target disk; after the write is completed, the disk responds to the adaptation layer by the write completion. The JBOD adaptation layer packs the disk response information into a Response frame, and encapsulates it in the MAC frame and sends it to the controller and the host respectively.

As shown in FIG. 15, an embodiment of the present invention provides a control device 1001, including:

The receiving unit 1002 is configured to receive, by using a network, first read information sent by the front end device, where the first read information includes a read command and logical interface address information of a disk of the backend storage device, where the read command is to be read. The data is stored on a disk of the backend storage device; the control device 1001, the front end device and the backend storage device are interconnected by the network;

The processing unit 1003 is configured to acquire address information of the backend storage device to which the disk belongs and the disk according to the logical interface address information of the disk in the first read information received by the receiving unit 1002. Physical interface address information;

The sending unit 1004 is configured to send the second read information to the backend storage device according to the address information of the backend storage device acquired by the processing unit 1003, where the second read information includes the read command The address information of the front-end device and the physical interface address information of the disk, so that the back-end storage device receives the second read information sent by the control device 1001 through the network, and according to the disk The physical interface address information is used to search for data to be read in the disk, and to send the found data to be read to the front-end device through the network according to the address information of the front-end device.

Optionally, the processing unit 1003 is configured to obtain address information of the backend storage device to which the disk belongs according to the logical interface address information of the disk in the first read information received by the receiving unit 1002. The physical interface address information of the disk includes:

And the method is: acquiring the disk according to logical interface address information and mapping relationship information of the disk Address information of the associated backend storage device and physical interface address information of the disk, the mapping relationship information is used to indicate logical interface address information of the disk and physical interface address information of the disk and the backend storage Correspondence between address information of devices.

Optionally, the sending unit 1004 is further configured to: before the receiving unit 1002 receives the first read information sent by the front end device by using the network, send a broadcast packet to the backend storage device, where the broadcast packet is used to The backend storage device reports the backend storage device information to the control device 1001, where the backend storage device information includes address information of the backend storage device and a physical interface address of a disk of the backend storage device. information;

The receiving unit 1002 is further configured to receive the backend storage device information reported by the backend storage device;

The processing unit 1003 is further configured to: after the receiving unit 1002 receives the backend storage device information reported by the backend storage device, establish logical interface address information of the disk and physical interface address information of the disk Corresponding relationship between the address information of the backend storage device.

As shown in FIG. 16, the embodiment of the present invention further provides a backend storage device 1101, including:

The receiving unit 1102 is configured to receive, by using the network, second read information sent by the control device, where the second read information includes a read command, address information of the front end device, and physical interface address information of the disk; The read data is stored on a disk of the backend storage device; the control device, the front end device and the backend storage device are interconnected by the network;

The searching unit 1103 is configured to: after the receiving unit 1102 receives the second read information, search for data to be read in the disk according to physical interface address information of the disk;

a sending unit 1104, after the searching unit 1103 finds the data to be read in the disk, according to the address information of the front-end device, sends the searched data to be searched through the network to the The front-end device.

Optionally, the backend storage device further includes: an obtaining unit, where the acquiring unit is configured to: before the receiving unit 1102 receives the second read information sent by the control device by using the network, Obtaining the physical interface address information of the disk when the storage device is started;

The sending unit 1104 is further configured to: when the receiving unit 1102 receives the sending by the control device The backend storage device information is reported to the control device, and the backend storage device information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device.

Optionally, the sending unit 1104 is further configured to receive, by using the network, second read information that is sent by the control device in a multimedia access control MAC frame format;

The sending unit 1104 is further configured to send, by using the network, the searched data to be read by the network to the front-end device in the form of the MAC frame according to an address of the front-end device.

Optionally, the searching unit 1103 is further configured to: after the receiving unit 1102 receives the read command, convert the small computer system interface command into a string if the read command is a small computer system interface command Connect the small computer system interface commands;

The searching unit 1103 is configured to search for data to be read in the disk according to the physical interface address of the disk, including:

And searching for data to be read in the disk according to the serial connection small computer system interface command and a physical interface address of the disk.

Optionally, the backend storage device comprises a disk cluster device.

As shown in FIG. 17, the embodiment of the present invention further provides a front end device 1201, including:

The sending unit 1203 is configured to send, by using a network, first read information to the control device, where the first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data to be read by the read command Stored on a disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

The receiving unit 1202 is configured to receive, by the network, the data to be read sent by the backend storage device after the sending unit 1203 sends the first read information to the control device by using the network.

Optionally, the sending unit 1203 is configured to send the first read information to the control device by using the network, including:

As shown in FIG. 2, an embodiment of the present invention further provides a storage system, including the foregoing embodiment. The control device, the backend storage device described in the above embodiment, and the front-end device described in the foregoing embodiment, the control device, the front-end device, and the back-end storage device are interconnected through the same network. Specifically, a storage system includes:

The front end device is configured to send first read information to the control device over the network; wherein the first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data to be read by the read command Stored on a disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

The control device is configured to receive, by using the network, the first read information sent by the front-end device, and obtain, according to the logical interface address information of the disk, address information of the back-end storage device to which the disk belongs and the disk The physical interface address information, and the second read information is sent to the backend storage device according to the address information of the backend storage device, where the second read information includes the read command, an address of the front end device Information and physical interface address information of the disk;

The backend storage device is configured to receive, by the network, the second read information sent by the control device, and search for data to be read in the disk according to physical interface address information of the disk, and And according to the address information of the front-end device, the found data to be read is sent to the front-end device through the network.

The control device acquires, according to the logical interface address information of the disk, the address information of the backend storage device to which the disk belongs and the physical interface address information of the disk, including:

Optionally, the control device is further configured to: before receiving the first read information sent by the front end device by using the network, send a broadcast packet to the backend storage device, where the broadcast packet is used to make the The end storage device reports the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device;

The backend storage device is further configured to receive a broadcast packet sent by the control device, and send the control The device reports the backend storage device information, where the backend storage device information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device;

The control device is further configured to receive the backend storage device information reported by the backend storage device, and establish logical interface address information of the disk and physical interface address information of the disk and the backend storage device. Correspondence of address information.

Optionally, the network includes any one of the following networks: a Fibre Channel network, an Ethernet, and a PCIe network.

As shown in FIG. 18, a control device 1801 includes a receiving unit 1802, a processing unit 1804, and a transmitting unit 1803.

The receiving unit 1802 is configured to receive first write information sent by the front end device by using a network; the first write information includes a write command and logical interface address information of a disk of the backend storage device; the control device, the front end device Interconnecting with the backend storage device through the network;

The processing unit 1804 is configured to acquire, according to the logical interface address information of the disk that is included in the first response information received by the receiving unit 1802, address information of the backend storage device to which the disk belongs and physical of the disk Interface address information;

The sending unit 1803 is configured to send the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, address information of the front end device, and The physical interface address information of the disk is such that the backend storage device receives the second write information sent by the control device through the network, and searches for the disk according to the physical interface address information of the disk. And generating first response information, and according to the address letter of the front end device Transmitting, by the network, the first response information to the control device; the first response information indicating a response of a disk of the backend storage device to a received write command initiated by the front end device;

The receiving unit 1802 is further configured to receive first response information that is sent by the backend storage device by using the network;

The processing unit 1804 generates second response information according to the first response information and address information of the backend storage device, where the second response information includes first response information and address information of the backend storage device. ;

The sending unit 1803 is further configured to send the second response information to the front end device, so that the front end device receives the second response information, and the data to be written according to the address information of the backend storage device Sending to the backend storage device such that the backend storage device receives the data to be written and writes the data to be written to the disk.

The sending unit 1803 is further configured to send a broadcast packet to the backend storage device before the receiving unit 1802 receives the first write information sent by the front end device by using the network, where the broadcast packet is used to make a The backend storage device reports the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device. ;

The receiving unit 1802 is further configured to receive the backend storage device information reported by the backend storage device, and establish logical interface address information of the disk and physical interface address information of the disk and the backend storage. Correspondence between address information of devices.

Optionally, the receiving unit 1802 is further configured to receive first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network.

Optionally, the receiving unit 1802 is further configured to receive, by using a network, first write information that is sent by the front end device in the form of a multimedia access control MAC frame.

As shown in FIG. 19, a front end device 1901 includes a transmitting unit 1902 and a receiving unit 1903.

The sending unit 1902 is configured to send first write information to the control device by using a network, where the first write information includes a write command and logical interface address information of a disk of the backend storage device, so that the control device receives the first Write information, and obtain the disk according to the logical interface address information of the disk The address information of the associated backend storage device and the physical interface address information of the disk; and sending the second write information to the backend storage device according to the address information of the backend storage device, the second write The information includes the write command, the address information of the front-end device, and the physical interface address information of the disk, so that the back-end storage device receives the second write information sent by the control device by using the network, and And searching for the disk according to the physical interface address information of the disk, and generating first response information, and sending, by using the network, the first response information to the control device according to the address information of the front-end device The first response information indicates a response of the disk of the backend storage device to the received write command initiated by the front end device; the control device is configured according to the first response information and the backend storage device Address information, generating second response information, and transmitting second response information to the front end device; the second response information includes first response information The rear end of the address information storage device; the control device, the front end and the rear storage device via the network interconnection device;

The receiving unit 1902 is configured to receive, by using a network, second response information that is sent by the control device.

The sending unit 1903 is configured to: after the receiving unit receives the second response information, send the data to be written to the backend storage device according to the address information of the backend storage device, so that the back end The storage device receives the data to be written and writes the data to be written to the disk.

Optionally, the receiving unit 1902 is further configured to receive, by using a network, second response information that is sent by the control device in the form of a multimedia access control MAC frame.

Optionally, the sending unit 1903 is further configured to send the first write information in the form of a multimedia access control MAC frame to the control device by using the network.

As shown in FIG. 20, a backend storage device 2001 includes a transmitting unit 2003, a processing unit 2004, and a receiving unit 2002.

The receiving unit 2002 is configured to receive, by using a network, the second write information sent by the control device, where the second write information includes the write command, address information of the front end device, and a physical interface of the disk of the backend storage device. Address information; the control device, the front end device, and the backend storage device are interconnected by the network;

The processing unit 2004 is configured to: according to the physicality of the disk received by the receiving unit 2002 The interface address information is used to find the disk and generate first response information; the first response information indicates a response of the disk of the backend storage device to the received write command initiated by the front end device;

The sending unit 2003 is configured to send the first response information to the control device by using the network, where the first response information indicates a response of the disk of the backend storage device 2001 to the received write command initiated by the front end device;

The receiving unit 2002 is further configured to: after the sending unit 2003 sends the first response information to the control device by using the network, the backend storage device 2001 receives, by using the network, the sending by the front-end device. Data to be written by the front-end device, and the data to be written is written to the disk.

Optionally, the sending unit 2003 is further configured to send, by using the network, the first response information to the control device in a multimedia access control MAC frame format;

The receiving unit 2002 is further configured to receive, by using the network, the second write information that is sent by the control device in a multimedia access control MAC frame format.

Optionally, the backend storage device 2001 includes a disk cluster device.

As shown in FIG. 8, a storage system includes: a control device as described in FIG. 18, a front end device as described in FIG. 19, and a backend storage device as described in FIG. 20, the control device, the The front-end device and the back-end storage device are interconnected through the same network.

Specifically, the storage system includes:

a front-end device, configured to send first write information to the control device by using a network, where the first write information includes a write command and logical interface address information of a disk of the back-end storage device; the control device, the front-end device, and the back end The storage devices are interconnected by the network;

a control device, configured to receive the first write information, and obtain, according to the logical interface address information of the disk, address information of the backend storage device to which the disk belongs and physical interface address information of the disk; The address information of the backend storage device is sent to the backend storage device, where the second write information includes the write command, address information of the front end device, and a physical interface address of the disk. information;

a backend storage device, configured to receive, by using the network, the second write sent by the control device And searching for the disk according to the physical interface address information of the disk, and generating first response information, and sending the first response information to the network through the network according to the address information of the front end device. a control device; the first response information indicating a response of the disk of the backend storage device to the received write command initiated by the front end device;

The control device is further configured to generate second response information according to the first response information and address information of the backend storage device, and send the second response information to the front end device; the second response information Include first response information and address information of the backend storage device;

The front-end device is further configured to receive, by using the network, the second response information that is sent by the control device; after obtaining the second response information, according to address information of the back-end storage device, Data is sent to the backend storage device through the network;

Optionally, the control device is further configured to: before receiving, by the network, the first write information sent by the front-end device, send a broadcast packet to the back-end storage device, where the broadcast packet is used to cause the back-end storage device to The control device reports the backend storage device information, where the backend storage device information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device;

The backend storage device is further configured to receive the broadcast packet sent by the control device, and report the backend storage device information to the control device;

Optionally, the control device is further configured to receive, by the backend storage device, the first response information that is sent by using the multimedia access control MAC frame in the network;

Optionally, the control device is further configured by the control device to receive, by using the network, the first write information that is sent by the front end device in a multimedia access control MAC frame format;

Optionally, the front end device is further configured to receive, by using the network, the second response information that is sent by the control device in a multimedia access control MAC frame format;

Optionally, the front end device is further configured to use the network to provide multimedia to the control device. Sending the first write information in the form of an access control MAC frame;

Optionally, the backend storage device is further configured to send, by using the network, the first response information to the control device in a multimedia access control MAC frame format;

Optionally, the backend storage device is further configured to receive, by using the network, the second write information that is sent by the control device in a multimedia access control MAC frame format.

A person of ordinary skill in the art may understand that all or part of the steps of the foregoing embodiments may be performed by a program to instruct related hardware. The program may be stored in a computer readable storage device, and the storage device may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.

The method, device and system for reading and writing data provided by the embodiments of the present invention are described in detail. The principles and implementation manners of the present invention are described in the specific examples. The description of the above embodiments is only used. To help understand the method of the present invention and its core ideas; at the same time, those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope, in summary, the contents of this specification It should not be construed as limiting the invention.

Claims

A method of reading data, comprising:

Receiving, by the network, the first read information sent by the front end device, where the first read information includes a read command and logical interface address information of a disk of the backend storage device, where the data to be read by the read command is stored in the On the disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected through the network;

The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information of the disk;

The control device sends the second read information to the backend storage device according to the address information of the backend storage device, where the second read information includes the read command, the address information of the front end device, and the The physical interface address information of the disk is such that the backend storage device receives the second read information sent by the control device by using the network, and searches for the disk according to the physical interface address information of the disk. The data to be read, and the data to be read, which is found by the network, are sent to the front-end device according to the address information of the front-end device.
The method for reading data according to claim 1, wherein the control device acquires address information of the backend storage device to which the disk belongs and a physical interface of the disk according to the logical interface address information of the disk. Address information, including:

The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information and the mapping relationship information of the disk, where the mapping relationship information is used to indicate Corresponding relationship between the logical interface address information of the disk and the physical interface address information of the disk and the address information of the backend storage device.
The method for reading data according to claim 1 or 2, wherein before the controlling device receives the first read information sent by the front-end device through the network, the method further includes:

The control device sends a broadcast packet to the backend storage device, where the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes Address information of the backend storage device and physical interface address information of a disk of the backend storage device;

Receiving, by the control device, the backend storage device information reported by the backend storage device, and establishing logical interface address information of the disk, physical interface address information of the disk, and address information of the backend storage device Correspondence.
The method for reading data according to any one of claims 1 to 3, wherein the control device receives the first read information sent by the front-end device through the network, including:

The control device receives, by using the network, the first read information sent by the front end device in the form of a multimedia access control MAC frame;

The control device sends the second read information to the backend storage device according to the address information of the backend storage device, including:

The control device sends the second read information to the backend storage device in the form of the MAC frame according to the address information of the backend storage device.
The method for reading data according to any one of claims 1 to 4, wherein the network comprises any one of the following networks: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A method of reading data, comprising:

The backend storage device receives, by using a network, second read information sent by the control device, where the second read information includes a read command, address information of the front end device, and physical interface address information of the disk; the data to be read by the read command is stored in the The control device, the front-end device, and the back-end storage device are interconnected by the network;

The backend storage device searches for data to be read in the disk according to physical interface address information of the disk, and searches for data to be read through the network according to address information of the front-end device. Sent to the front end device.
The method of reading data according to claim 6, wherein before the receiving, by the backend storage device, the second read information sent by the control device, the method further comprises:

When the backend storage device is started, the backend storage device acquires physical interface address information of the disk;

When the backend storage device receives the broadcast packet sent by the control device, to the control device The backend storage device information is reported, and the backend storage device information includes address information of the backend storage device and physical interface address information of a disk of the backend storage device.
The method for reading data according to claim 6 or 7, wherein the receiving, by the backend storage device, the second read information sent by the control device by using the network includes:

Receiving, by the backend storage device, the second read information sent by the control device in the form of a multimedia access control MAC frame by using the network;

The back-end storage device sends, to the front-end device, the data to be read by the network, according to the address of the front-end device, including:

The backend storage device sends the data to be read by the network to the front end device in the form of the MAC frame according to the address of the front end device.
The method for reading data according to any one of claims 6 to 8, wherein the network comprises any one of the following networks: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A method of reading data, comprising:

The front-end device sends the first read information to the control device through the network; wherein the first read information includes a read command and logical interface address information of a disk of the back-end storage device, and the data to be read by the read command is stored in the The control device, the front-end device, and the back-end storage device are interconnected by the network;

Receiving, by the network, the first read information sent by the front-end device, and acquiring the address information of the back-end storage device to which the disk belongs and the physicality of the disk according to the logical interface address information of the disk The interface address information, and the second read information is sent to the backend storage device according to the address information of the backend storage device, where the second read information includes the read command, address information of the front end device, and Physical interface address information of the disk;

The backend storage device receives the second read information sent by the control device by using the network, and searches for data to be read in the disk according to physical interface address information of the disk, and according to the The address information of the front-end device is sent to the front-end device by the network to find the data to be read.
The method for reading data according to claim 10, wherein the control device acquires address information of the backend storage device to which the disk belongs and a physical interface of the disk according to the logical interface address information of the disk Address information, including:

The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information and the mapping relationship information of the disk, where the mapping relationship information is used to indicate Corresponding relationship between the logical interface address information of the disk and the physical interface address information of the disk and the address information of the backend storage device.
The method for reading data according to claim 10 or 11, wherein before the controlling device receives the first read information sent by the front end device by using the network, the method further includes:

The control device sends a broadcast packet to the backend storage device, where the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes Address information of the backend storage device and physical interface address information of a disk of the backend storage device;

Receiving, by the backend storage device, the broadcast packet sent by the control device, and reporting the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device and the Physical interface address information of the disk of the end storage device;

Receiving, by the control device, the backend storage device information reported by the backend storage device, and establishing logical interface address information of the disk, physical interface address information of the disk, and address information of the backend storage device Correspondence.
The method for reading data according to any one of claims 10 to 12, wherein the control device receives the first read information sent by the front-end device through the network, including:

The control device receives, by using the network, the first read information sent by the front end device in the form of a multimedia access control MAC frame;

The control device sends the second read information to the backend storage device according to the address information of the backend storage device, including:

The control device uses the address information of the backend storage device to use the second read information as the MAC address. The frame form is sent to the backend storage device.
The method for reading data according to any one of claims 10 to 13, wherein the network comprises any one of the following: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A method of writing data, comprising:

The control device receives, by using a network, first write information sent by the front-end device; the first write information includes a write command and logical interface address information of a disk of the back-end storage device; the control device, the front-end device, and the back end The storage devices are interconnected by the network;

The control device acquires address information of the backend storage device to which the disk belongs and physical interface address information of the disk according to the logical interface address information of the disk;

The control device sends the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, address information of the front end device, and the disk The physical interface address information is such that the backend storage device receives the second write information sent by the control device through the network, and finds the disk according to the physical interface address information of the disk, and generates First response information, and transmitting, by the network, the first response information to the control device according to address information of the front end device; the first response information indicating a disk pair reception of the backend storage device a response to a write command initiated by the front end device;

Receiving, by the control device, first response information that is sent by the backend storage device through a network;

After receiving the first response information, the control device generates second response information according to the first response information and the address information of the backend storage device, where the second response information includes the first response information. And address information of the backend storage device;

The control device sends the second response information to the front-end device, so that the front-end device receives the second response information, and passes the data to be written through the network according to the address information of the back-end storage device. Sending to the backend storage device such that the backend storage device receives the data to be written and writes the data to be written to the disk.
The method for writing data according to claim 15, wherein before the controlling device receives the first write information sent by the front-end device through the network, the method further includes:

The control device sends a broadcast packet to the backend storage device, where the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes Address information of the backend storage device and physical interface address information of a disk of the backend storage device;

Receiving, by the control device, the backend storage device information reported by the backend storage device, and establishing logical interface address information of the disk, physical interface address information of the disk, and address information of the backend storage device Correspondence.
The method for writing data according to claim 15 or 16, wherein the control device receives the first response information that is sent by the backend storage device through the network, and includes:

Receiving, by the control device, first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network;

Receiving, by the control device, the first write information sent by the front end device by using the network, including:

The control device receives, by using the network, first write information that is sent by the front end device in the form of a multimedia access control MAC frame.
The method for writing data according to any one of claims 15 to 17, wherein the network comprises any one of the following: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A method of writing data, comprising:

The front-end device sends the first write information to the control device through the network, where the first write information includes a write command and logical interface address information of the disk of the back-end storage device, so that the control device receives the first write information, and according to the And obtaining, by the logical interface address information of the disk, the address information of the backend storage device to which the disk belongs and the physical interface address information of the disk; and sending the second write information according to the address information of the backend storage device For the backend storage device, the second write information includes the write command, address information of the front end device, and physical interface address information of the disk, so that the backend storage device receives the network through the network The second write information sent by the control device, and searching for the disk according to the physical interface address information of the disk, and generating first response information, and passing the network according to the address information of the front-end device Transmitting the first response information to the control device; the first response information indicating a disk pair of the backend storage device Received a response of the write command initiated by the front-end device; the control device generates second response information according to the first response information and the address information of the back-end storage device, and sends the second response information to the front-end device The second response information includes first response information and address information of the backend storage device; the control device, the front end device, and the backend storage device are interconnected by the network;

The front-end device receives the second response information sent by the control device by using the network, and sends the data to be written to the back-end storage device according to the address information of the back-end storage device, so that the The end storage device receives the data to be written and writes the data to be written to the disk.
The method of writing data according to claim 19, wherein the sending, by the front-end device, the first write information to the control device by using the network includes:

Sending, by the front-end device, the first write information to the control device in the form of a multimedia access control MAC frame through the network;

The front-end device receives the second response information sent by the control device by using a network, including:

The front end device receives, by using the network, second response information that is sent by the control device in the form of a multimedia access control MAC frame.
The method for writing data according to claim 19 or 20, wherein the network comprises any one of the following: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A method of writing data, comprising:

Receiving, by the network device, the second write information sent by the control device, where the second write information includes the write command, address information of the front end device, and physical interface address information of the disk of the backend storage device; The control device, the front end device, and the backend storage device are interconnected by the network;

The backend storage device searches for the disk according to the physical interface address information of the disk, and generates first response information; the first response information indicates that the disk of the backend storage device receives the received The response of the write command initiated by the front-end device;

Transmitting, by the backend storage device, the first response information to the control device by using the network, where the first response information indicates that the disk device of the backend storage device receives the front-end device In response to the initiated write command, the disk of the backend storage device is used to write data to be written by the write command;

After the backend storage device sends the first response information to the control device through the network, the backend storage device receives, by the network, data to be written by the front end device sent by the front end device, and The data to be written is written to the disk.
The method of writing data according to claim 22, wherein the backend storage device sends the first response information to the control device by using the network, including:

The backend storage device sends the first response information to the control device in the form of a multimedia access control MAC frame through the network;

Receiving, by the backend storage device, the second write information sent by the control device by using the network, including:

The backend storage device receives, by the network, the second write information that is sent by the control device in the form of a multimedia access control MAC frame.
The method for writing data according to claim 22 or 23, wherein the network comprises any one of the following: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A method of writing data, comprising:

The front-end device sends first write information to the control device through the network, where the first write information includes a write command and logical interface address information of a disk of the back-end storage device; the control device, the front-end device, and the back-end storage device pass The network interconnection;

Receiving, by the control device, the first write information, and acquiring, according to the logical interface address information of the disk, address information of the backend storage device to which the disk belongs and physical interface address information of the disk; The address information of the backend storage device sends the second write information to the backend storage device, where the second write information includes the write command, address information of the front end device, and physical interface address information of the disk ;

The backend storage device receives the second write information sent by the control device by using the network, and finds the disk according to physical interface address information of the disk, and generates first response information, and according to the Address information of the front end device, the first response information is sent through the network Sending to the control device; the first response information indicates a response of the disk of the backend storage device to the received write command initiated by the front end device;

The control device generates second response information according to the first response information and the address information of the backend storage device, and sends the second response information to the front end device; the second response information includes the first Response information and address information of the backend storage device;

The front-end device receives the second response information sent by the control device by using the network; after obtaining the second response information, the data to be written is passed according to the address information of the back-end storage device. Sending the network to the backend storage device;

The backend storage device receives the data to be written and writes the data to be written to the disk.
The method for writing data according to claim 25, wherein before the controlling device receives the first write information sent by the front end device through the network, the method further includes:

The control device sends a broadcast packet to the backend storage device, where the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes Address information of the backend storage device and physical interface address information of a disk of the backend storage device;

Receiving, by the backend storage device, the broadcast packet sent by the control device, and reporting the backend storage device information to the control device;

Receiving, by the control device, the backend storage device information reported by the backend storage device, and establishing logical interface address information of the disk, physical interface address information of the disk, and address information of the backend storage device Correspondence.
The method for writing data according to claim 25 or 26, wherein the receiving, by the control device, the first response information that is sent by the backend storage device through the network, includes:

Receiving, by the control device, the first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network;

Receiving, by the control device, the first write information sent by the front end device by using the network, including:

Receiving, by the control device, the first write information that is sent by the front end device in the form of a multimedia access control MAC frame by using the network;

Receiving, by the network device, the second response information sent by the control device by using the network, including:

Receiving, by the front end device, the second response information that is sent by the control device in a form of a multimedia access control MAC frame by using the network;

Sending, by the front-end device, the first write information to the control device by using the network, including:

Sending, by the front-end device, the first write information to the control device in the form of a multimedia access control MAC frame through the network;

The backend storage device sends the first response information to the control device by using the network, including:

The backend storage device sends the first response information to the control device in the form of a multimedia access control MAC frame through the network;

Receiving, by the backend storage device, the second write information sent by the control device by using the network, including:

The backend storage device receives, by the network, the second write information that is sent by the control device in the form of a multimedia access control MAC frame.
The method for writing data according to any one of claims 25 to 27, wherein the network comprises any one of the following networks: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.
A control device, comprising:

a receiving unit, configured to receive, by using a network, first read information sent by the front end device, where the first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data to be read by the read command Stored on a disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

a processing unit, configured to acquire, according to logical interface address information of the disk in the first read information received by the receiving unit, address information of a backend storage device to which the disk belongs and a physical interface of the disk Address information;

a sending unit, configured to receive, according to the processing unit, an address letter of the backend storage device Transmitting, to the backend storage device, the second read information includes the read command, address information of the front end device, and physical interface address information of the disk, so that the back end The storage device receives the second read information sent by the control device by using the network, and searches for data to be read in the disk according to physical interface address information of the disk, and according to the front end device The address information is sent to the front end device by the network to find the data to be read.
The control device according to claim 29, wherein the processing unit is configured to acquire, according to the logical interface address information of the disk in the first read information received by the receiving unit, the disk to which the disk belongs The address information of the backend storage device and the physical interface address information of the disk, including:

And the information about the address of the backend storage device to which the disk belongs and the physical interface address information of the disk are obtained according to the logical interface address information and the mapping relationship information of the disk, where the mapping relationship information is used to indicate the Correspondence between the logical interface address information of the disk and the physical interface address information of the disk and the address information of the backend storage device.
The control device according to claim 29 or 30, wherein the transmitting unit is further configured to send a broadcast to the backend storage device before the receiving unit receives the first read information sent by the front end device through the network. a packet, the broadcast packet is used to cause the backend storage device to report the backend storage device information to the control device, where the backend storage device information includes address information of the backend storage device and the back Physical interface address information of the disk of the end storage device;

The receiving unit is further configured to receive the backend storage device information reported by the backend storage device;

The processing unit is further configured to: after the receiving unit receives the backend storage device information reported by the backend storage device, establish logical interface address information of the disk and physical interface address information of the disk and the The correspondence between the address information of the backend storage device.
A backend storage device, comprising:

a receiving unit, configured to receive, by using a network, second read information sent by the control device, where the second read information includes a read command, address information of the front end device, and physical interface address information of the disk; and data storage to be read by the read command On the disk of the backend storage device; the control device, the front end The device and the backend storage device are interconnected by the network;

a searching unit, configured to: after the receiving unit receives the second read information, search for data to be read in the disk according to physical interface address information of the disk;

a sending unit, configured to send the searched data to be read by the network to the front end according to the address information of the front end device after the searching unit searches for the data to be read in the disk device.
The backend storage device according to claim 32, further comprising: an obtaining unit, configured to: before the receiving unit receives the second read information sent by the control device by using the network, Obtaining physical interface address information of the disk when the backend storage device is started;

The sending unit is further configured to: when the receiving unit receives the broadcast packet sent by the control device, report the backend storage device information to the control device, where the backend storage device information includes the backend storage device Address information and physical interface address information of the disk of the backend storage device.
The backend storage device according to claim 32 or 33, wherein the sending unit is configured to receive, by the network, second read information that is sent by the control device in a multimedia access control MAC frame format;

The sending unit is configured to send, by using the network, the searched data to be read by the network to the front end device in the form of the MAC frame according to an address of the front end device.
A front-end device, comprising:

a sending unit, configured to send first read information to the control device over the network; wherein the first read information includes a read command and logical interface address information of a disk of the backend storage device, and the data storage to be read by the read command On the disk of the backend storage device; the control device, the front-end device, and the back-end storage device are interconnected by the network;

a receiving unit, configured to receive, by the network, the data to be read sent by the backend storage device after the sending unit sends the first read information to the control device by using the network.
The front-end device according to claim 35, wherein the sending unit is configured to send the first read information to the control device over the network, including:

And transmitting, by using a network, the first read information in a form of a multimedia access control MAC frame to the control device.
A storage system, comprising the control device according to any one of claims 29 to 31, the backend storage device according to any one of claims 32 to 34, and the method of claim 35 or 36 The front-end device, the control device, the front-end device and the back-end storage device are interconnected through the same network.
The storage system according to claim 37, wherein the network comprises any one of the following: a Fibre Channel network, an Ethernet, and a fast peripheral interconnect standard PCIe network.
A control device, comprising: a receiving unit, a processing unit, and a sending unit,

The receiving unit is configured to receive, by using a network, first write information sent by the front end device; the first write information includes a write command and logical interface address information of a disk of the backend storage device; the control device, the front end device, and The backend storage devices are interconnected by the network;

The processing unit is configured to acquire, according to the logical interface address information of the disk that is included in the first response information received by the receiving unit, address information of a backend storage device to which the disk belongs and a physical interface address of the disk information;

The sending unit is configured to send the second write information to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command, address information of the front end device, and the The physical interface address information of the disk is such that the backend storage device receives the second write information sent by the control device through the network, and searches for the disk according to the physical interface address information of the disk. And generating first response information, and sending, by the network, the first response information to the control device according to the address information of the front end device; the first response information indicating a disk of the backend storage device a response to a received write command initiated by the front end device;

The receiving unit is further configured to receive first response information that is sent by the backend storage device by using the network;

The processing unit generates second response information according to the first response information and address information of the backend storage device, where the second response information includes first response information and address information of the backend storage device;

The sending unit is further configured to send the second response information to the front end device, so that the front end device receives the second response information, and sends the data to be written according to the address information of the backend storage device. Giving the backend storage device such that the backend storage device receives the data to be written and writes the data to be written to the disk.
The control device according to claim 39, wherein the sending unit is further configured to: before the receiving unit receives the first write information sent by the front end device by using the network, to the back end storage device Sending a broadcast packet, the broadcast packet is used to report the backend storage device information to the control device, where the backend storage device information includes address information and a location of the backend storage device The physical interface address information of the disk of the backend storage device;

The receiving unit is further configured to receive the backend storage device information reported by the backend storage device, and establish logical interface address information of the disk and physical interface address information of the disk and the backend storage device. Correspondence of address information.
The control device according to claim 39 or 40, wherein the receiving unit is further configured to receive first response information that is sent by the backend storage device in the form of a multimedia access control MAC frame by using the network;

The sending unit is further configured to receive, by using the network, first write information that is sent by the front end device in a multimedia access control MAC frame format.
A front-end device, comprising: a sending unit and a receiving unit, wherein the sending unit is configured to send first write information to a control device by using a network, where the first write information includes a write command and a backend storage device The logical interface address information of the disk is such that the control device receives the first write information, and obtains address information of the backend storage device to which the disk belongs and the disk according to the logical interface address information of the disk. And the second write information is sent to the backend storage device according to the address information of the backend storage device, where the second write information includes the write command and the address information of the front end device. And the physical interface address information of the disk, the backend storage device receives the second write information sent by the control device by using the network, and finds the information according to the physical interface address information of the disk. Disk, and generating first response information, and according to the address information of the front end device, the first response letter is sent through the network Transmitted to the control device; the first response information indicative of the rear end of the disk storage device docking received a response of the write command initiated by the front-end device; the control device generates second response information according to the first response information and the address information of the back-end storage device, and sends the second response information to the front-end device The second response information includes first response information and address information of the backend storage device; the control device, the front end device, and the backend storage device are interconnected by the network;

The receiving unit is configured to receive, by using the network, second response information sent by the control device;

The sending unit is further configured to: after the receiving unit receives the second response information, send the data to be written to the backend storage device according to the address information of the backend storage device, so that the back end The storage device receives the data to be written and writes the data to be written to the disk.
The front-end device according to claim 42, wherein the receiving unit is further configured to receive, by using the network, second response information that is sent by the control device in a multimedia access control MAC frame format;

The sending unit is further configured to send, by using the network, the first write information to the control device in the form of a multimedia access control MAC frame.
A backend storage device, comprising: a sending unit, a processing unit, and a receiving unit,

The receiving unit is configured to receive, by using a network, the second write information sent by the control device, where the second write information includes the write command, address information of the front end device, and a physical interface address of the disk of the backend storage device. Information; the control device, the front end device, and the backend storage device are interconnected by the network;

The processing unit is configured to find the disk according to the physical interface address information of the disk that is received by the receiving unit, and generate first response information; the first response information indicates that the backend storage device is a response of the disk to the received write command initiated by the front end device;

The sending unit is configured to send the first response information to the control device by using the network;

The receiving unit is further configured to: after the sending unit sends the first response information to the control device by using a network, receive, by using the network, the front-end device that is sent by the front-end device The data to be written and write the data to be written to the disk.
A backend storage device according to claim 44, wherein

The sending unit is further configured to send, by using the network, the first response information to the control device in a multimedia access control MAC frame format;

The receiving unit is further configured to receive, by using the network, the second write information that is sent by the control device in a multimedia access control MAC frame format.
A storage system, comprising: a control device according to any one of claims 39 to 41, a front end device according to claim 42 or 43 and a back end according to claim 44 or 45 The storage device, the control device, the front-end device, and the back-end storage device are interconnected through the same network.
The storage system according to claim 46, wherein the network comprises any one of the following: a fiber channel network, an Ethernet, and a fast peripheral interconnection standard PCIe network.