CN111752480A - A data writing method, data reading method and related equipment and system - Google Patents

Abstract

The embodiments of the present invention disclose a data writing method, a data reading method, and related equipment and systems. The data writing method includes: receiving a write request for a remote storage node initiated by an application program calling a key-value storage interface for writing data, the write request carrying a key-value pair consisting of a key and a value, wherein the key is used to indicate The destination address of the data to be written, the value is used to indicate the source address of the data to be written and the size of the data to be written; according to the key-value pair, a write command that conforms to the high-speed network storage protocol is generated; the write command includes: The first field of the destination address of the data to be written, the second field used to indicate the source address of the data to be written, and the third field used to indicate the size of the data to be written; The end storage node sends a write command. The above solution is compatible with the respective storage advantages of key-value storage and the high-speed network storage protocol.

Description

A data writing method, data reading method and related equipment and system

technical field

The invention relates to the field of storage, in particular to a data writing method, a data reading method, and related equipment and systems.

Background technique

With the rapid development of information technology, the mass storage of data brings new demands and challenges to the storage system. In order to cope with this challenge, the storage management technology of key-value storage (ie Key-Value storage, KV storage for short) emerges as the times require. KV storage can meet the needs of efficient storage and access to massive data. In addition, as an efficient storage protocol, Non-Volatile Memory Express (NVMe) has been supported by many flash memory, server and storage manufacturers, and its ecology is becoming more and more mature. At the same time, a more efficient network storage protocol is also coming out with the evolution of flash memory technology, which is NVMe Over Fabric. NVMe Over Fabric replaces the iSCSI (such as iSER under Linux or SMB3 under Windows) used in the previous front-end, so that end users can directly access remote NVMe devices with fast and low latency through the NVMe Over Fabric protocol.

Based on the advantages of NVMe Over Fabric supporting remote storage and the advantages of KV storage management technology supporting efficient mass data storage management, the compatibility between KV interface and NVMe Over Fabric will play an important role in the future storage field, with good and broad market prospects.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a data writing method, a data reading method, and related equipment and systems, which can implement a key-value storage interface to be carried on the high-speed network storage protocol used for network storage, and are compatible with key-value storage and all The respective storage advantages of the high-speed network storage protocols described above.

In the first aspect, a data writing method is provided, applied to the host side, including:

A write request for a remote storage node is received, the write request carries a key-value pair consisting of a key and a value, and a write command conforming to the high-speed network storage protocol is generated according to the key-value pair, and finally the high-speed network storage The interface of the protocol sends the write command to the remote storage node, triggering the remote storage node to respond to the write command and write the to-be-written data stored at the source address into the destination address in the mapped physical address.

Specifically, the write request is a request initiated by an application program by calling a key-value storage interface for writing data, such as KV_write(); the input parameters of the key-value storage interface for writing data include the key value Yes, wherein the key is used to indicate the destination address of the data to be written, and the value is used to indicate the source address of the data to be written and the size of the data to be written.

Specifically, the write command may include: a first field for indicating the destination address of the data to be written, a second field for indicating the source address of the data to be written, and a second field for indicating the data to be written The third field of the size of the data to be written.

Understandably, since the key-value pair contains the values of the first field, the second field and the third field in the write command, the host can fill in the write command according to the key-value pair carried in the write request. The corresponding fields of the command.

By implementing the data writing method described in the first aspect, the key-value storage interface for writing data can be carried on the high-speed network storage protocol used for network storage, so that the application program can implement the key-value storage interface through the key-value storage interface. The data write operation of the remote storage node is compatible with the respective storage advantages of the key-value storage interface and the high-speed network storage protocol.

In a second aspect, a data writing method is provided, applied to the remote storage node side, including:

A write command that conforms to the high-speed network storage protocol sent by the host is received through the interface of the high-speed network storage protocol, and the destination address of the data to be written and the metadata of the data to be written are stored in the target cache in a one-to-one correspondence In the target database in the area, and analyze the physical address mapped by the destination address, and then respond to the write command, write the to-be-written data into the physical address mapped by the destination address.

Specifically, the write command may include: a first field for indicating the destination address of the data to be written, a second field for indicating the source address of the data to be written, and a second field for indicating the to-be-written data A third field of the size of the input data, and a fourth field of metadata used to indicate the data to be written. The target database provides metadata access interfaces to the host, such as interfaces for adding, deleting, modifying, and querying.

With the same beneficial effect of implementing the data writing method described in the first aspect, implementing the data writing method described in the second aspect can also realize that the key-value storage interface for writing data is carried on the high-speed network for network storage. In terms of storage protocol, the application program can realize the data write operation to the remote storage node through the key-value storage interface, which is compatible with the respective storage advantages of the key-value storage interface and the high-speed network storage protocol.

Moreover, it can be understood that the target database provided by the present invention can realize: the host directly accesses the metadata of the data to be written from the memory of the remote storage node (that is, the target database), without having to The metadata of the to-be-written data is searched block by block on the storage hard disk, thereby realizing efficient access and management of the metadata of the data written to the storage hard disk.

In an implementation manner, after the remote storage node writes the to-be-written data into the physical address mapped by the destination address, the remote storage node can use the high-speed network storage protocol The interface returns a write response to the host.

Correspondingly, the host may receive the write response returned by the remote storage node through the interface of the high-speed network storage protocol.

In a specific implementation, after the host receives the write response, the host may convert the data format of the write response into a key-value storage interface for receiving the write response, such as KV_Get_Response(), which can recognize the write response. Response format such that the application recognizes the write response by invoking the key-value store interface.

In an implementation manner, after receiving the write command sent by the host, the remote storage node may send an acquisition request for the data to be written to the host, and the acquisition request may include the data to be written source address.

Correspondingly, the host may receive a request for obtaining the data to be written sent by the remote storage node.

Afterwards, the host may respond to the acquisition request and send the to-be-written data stored at the source address to the remote storage node through the interface of the high-speed network storage protocol.

Correspondingly, the remote storage node can receive the data to be written sent by the host through the interface of the high-speed network storage protocol.

In a third aspect, a data reading method is provided, applied to the host side, including:

A read request for a remote storage node is received, the read request carries a key-value pair consisting of a key and a value, and a read command conforming to the high-speed network storage protocol is generated according to the key-value pair, and finally the high-speed network storage The interface of the protocol sends the read command to the remote storage node, triggering the remote storage node to respond to the read command and read the data to be read from the physical address mapped by the source address.

Specifically, the read request is a request initiated by an application program by calling a key-value storage interface for reading data, such as KV_read(), and the input parameters of the key-value storage interface for reading data include the key value Right; the key is used to indicate the source address of the data to be read, and the value is used to indicate the destination address of the data to be read and the size of the data to be read;

Specifically, the read command may include: a first field for indicating the source address of the data to be read, a second field for indicating the destination address of the data to be read, and a second field for indicating the data to be read. The third field of the size of the data to be read.

Understandably, since the key-value pair contains the values of the first field, the second field and the third field in the read command, the host can fill in the read command according to the key-value pair carried in the read request. The corresponding fields of the command.

Implementing the data reading method described in the first aspect can realize that the key-value storage interface for reading data is carried on the high-speed network storage protocol used for network storage, so that the application program can implement the key-value storage interface through the key-value storage interface. The data read operation of the remote storage node is compatible with the respective storage advantages of the key-value storage interface and the high-speed network storage protocol.

In a fourth aspect, a data reading method is provided, applied to the remote storage node side, including:

Receive a read command that conforms to the high-speed network storage protocol sent by the host through the interface of the high-speed network storage protocol, analyze the physical address mapped by the source address, and then respond to the read command, from the physical address mapped by the source address. The data to be read is read from the address.

Specifically, the read command may include: a first field for indicating the source address of the data to be read, a second field for indicating the destination address of the data to be read, and a second field for indicating the data to be read. The third field of the size of the data to be read.

With the same beneficial effect as implementing the data reading method described in the third aspect, implementing the data reading method described in the fourth aspect can also realize that the key-value storage interface used for reading data is carried on the high-speed network used for network storage. In terms of storage protocol, the application program can realize the data read operation on the remote storage node through the key-value storage interface, which is compatible with the respective storage advantages of the key-value storage interface and the high-speed network storage protocol.

In an implementation manner, after the remote storage node reads the data to be read from the physical address mapped by the source address, the remote storage node can pass the high-speed network storage protocol The interface returns a read response to the host.

Correspondingly, the host may receive the read response returned by the remote storage node through the interface of the high-speed network storage protocol.

In a specific implementation, after receiving the read response, the host may convert the data format of the read response into a key-value storage interface for receiving the read response, such as KV_Get_Response(), a recognizable read response format, The application is caused to recognize the read response by invoking the key-value store interface.

In an implementation manner, after receiving the read command sent by the host, the remote storage node may further send a sending request for the data to be read to the host, where the sending request includes the The destination address of the data to be read.

Correspondingly, the host can receive the sending request sent by the remote storage node, and return a response to the sending request to the remote storage node.

Afterwards, the remote storage node may receive the response returned by the host, and send the data to be read to the host through an interface of a high-speed network storage protocol.

Correspondingly, the host may receive the data to be read sent by the remote storage node through the interface of the high-speed network storage protocol, and store the data to be read at the destination address.

In a fifth aspect, a data writing device is provided, comprising a unit for performing the method of the first aspect.

In a sixth aspect, a storage node is provided, comprising a unit for performing the method of the second aspect.

In a seventh aspect, a data reading device is provided, comprising a unit for performing the method of the third aspect.

In an eighth aspect, a storage node is provided, comprising a unit for performing the method of the fourth aspect.

In a ninth aspect, a data writing device is provided for executing the data writing method described in the first aspect. The data writer station may include: a memory and a processor coupled to the memory, a transmitter and a receiver, wherein the transmitter is configured to transmit a mobile communication signal to a remote storage node, and the receiver is configured to receive The mobile communication signal sent by the remote storage node, the memory is used to store the implementation code of the data writing method described in the first aspect, and the processor is used to execute the program code stored in the memory, that is, to execute the first aspect Describes the data writing method.

A tenth aspect provides a data reading device for executing the data reading method described in the third aspect. The data reading device station may include a memory and a processor coupled to the memory, a transmitter and a receiver, wherein the transmitter is configured to transmit a mobile communication signal to a remote storage node, and the receiver is configured to receive The mobile communication signal sent by the remote storage node, the memory is used to store the implementation code of the data reading method described in the third aspect, and the processor is used to execute the program code stored in the memory, that is, to execute the third aspect Describes the data read method.

In an eleventh aspect, a storage system is provided, comprising: a data writing device and a storage node, wherein: the data writing device is the data writing device described in the fifth aspect, and the storage node is the sixth aspect The storage node described in the content.

In some possible implementations, the data writing device may also be the storage node described in the ninth aspect above.

A twelfth aspect provides a storage system, comprising: a data reading device and a storage node, wherein: the data reading device is the data reading device described in the above seventh aspect, and the storage node is the above eighth aspect The storage node described in the content.

In some possible implementations, the data reading device may also be the data reading device described in the tenth aspect above.

Implementing the embodiment of the present invention, the host can generate a read and write command that conforms to the high-speed network storage protocol according to the key-value pair carried by the read and write request for the remote storage node sent by the application program, and the read and write request is the application program. A request initiated by calling a key-value storage interface; and, the host may send the read and write commands that conform to the high-speed network storage protocol to the remote storage node through the transmission interface conforming to the high-speed network storage protocol, so as to trigger all The remote storage node responds to the read and write commands conforming to the high-speed network storage protocol, and completes the remote read and write operations. The above solution can implement the key-value storage interface to be carried on the high-speed network storage protocol, so that applications can read and write operations to the remote storage node through the key-value storage interface, which is compatible with key-value storage and the high-speed network. The storage advantages of the respective storage protocols.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments.

1 is a schematic diagram of an application scenario provided by an embodiment of the present invention;

2 is a schematic flowchart of a data writing method provided by an embodiment of the present invention;

3 is a schematic diagram of an NVM command involved in an embodiment of the present invention;

4 is a schematic diagram of the mutual mapping of logical addresses and physical addresses involved in an embodiment of the present invention;

5 is a schematic diagram of a message flow involved in an embodiment of the present invention;

6 is a schematic flowchart of a data reading method provided by an embodiment of the present invention;

7 is a schematic structural diagram of a data writing device provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a storage node according to an embodiment of the present invention;

9 is a schematic structural diagram of another data writing device provided by an embodiment of the present invention;

10 is a schematic structural diagram of a data reading device provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a storage node according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another data reading device provided by an embodiment of the present invention.

Detailed ways

The terms used in the embodiments of the present invention are only used to explain specific embodiments of the present invention, and are not intended to limit the present invention.

To better understand the embodiments of the present invention, the following uses the NVMe Over Fabric protocol as an example to describe application scenarios of the embodiments of the present invention.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of an application scenario disclosed by an embodiment of the present invention. In the application scenario shown in Figure 1, a host (Host) and a remote storage node form a network storage system, and both the host and the remote storage node are integrated with an NVMe Over Fabric (hereinafter referred to as NOF) interface. communicate through the NOF interface. The host can be used to generate standard NVM commands, and send the NVM commands to the remote storage node through the NOF interface integrated on the host; the remote storage node can be used to receive the NVM command sent by the host through the NOF interface. NVM commands, and in response to the NVM commands, perform read and write operations on storage devices corresponding to the remote storage nodes, such as multiple solid state drives (Solid State Drives, SSDs) shown in the accompanying drawings.

Specifically, as shown in FIG. 1 , the interaction between the host and the remote storage node may mainly include: a control plane and a data plane. The control plane may be mainly responsible for: the host sending an NVM standard command to the remote storage node, and the remote storage node returning a response (Response) to the NVM standard command to the host; The data plane may be mainly responsible for: the host sending data to be written to the remote storage node, and the remote storage node sending data to be read to the host.

It should be noted that the host involved in the embodiment of the present invention may include: a computing device compatible with a NOF interface and capable of accessing the remote storage node, such as a server, a storage management device, and the like.

It should be noted that the remote storage node involved in the embodiment of the present invention may refer to a storage node integrated with the high-speed network storage protocol interface. Here, the remote storage node may refer to a storage node located in a remote network storage system relative to the host, or may refer to a storage node located in a distributed storage system (eg, cloud storage).

It should be noted that the high-speed network storage protocol involved in this embodiment refers to a storage protocol used for network storage and whose storage bandwidth reaches the Gbps level (eg, 1 Gbps or higher), such as the NVMe Over Fabric protocol. The embodiment of the present invention does not limit the specific form of the high-speed network storage protocol, and a high-speed storage protocol for network storage that may appear in the future also belongs to the implementation object of the solution of the present invention.

It should be noted that the network storage system shown in FIG. 1 is only a simple example provided by the embodiments of the present invention, and the specific networking form of the network storage system may be determined according to actual application scenarios and requirements, and is not limited here.

Embodiments of the present invention provide a data writing method, a data reading method, and related devices and systems. A host can generate a key-value pair (key-value) carried by a read and write request for a remote storage node sent by an application program to generate A read and write command that conforms to the high-speed network storage protocol, and the read and write request is a request initiated by the application program by calling a key-value storage interface (hereinafter referred to as the KV interface); and, the host can pass the high-speed network storage protocol. The transmission interface sends the read and write commands conforming to the high-speed network storage protocol to the remote storage node, so as to trigger the remote storage node to respond to the read and write commands conforming to the high-speed network storage protocol, and complete the remote read and write operations. . The solution of the present invention can realize that the KV interface is carried on the high-speed network storage protocol used for network storage, so that the application program can read and write operations to the remote storage node through the key-value storage interface, which is compatible with KV storage and all The respective storage advantages of the above-mentioned high-speed network storage protocols (such as NVMe Over Fabric). Each of them will be described in detail below.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a data writing method provided by an embodiment of the present invention. As shown in Figure 2, the method includes:

S101, the host receives a write request for a remote storage node, the write request carries a key-value pair consisting of a key and a value, the key is used to indicate the destination address of the data to be written, and the value is used to indicate the The source address of the data to be written and the size of the data to be written. Specifically, the write request may be a request initiated by an application program by calling a KV interface for writing data, such as KV_write(). In practical applications, the write request may also be a request initiated by a remote application program calling a KV interface for writing data, which is not limited here.

Here, the source address of the data to be written refers to the address on the host for storing the data to be written before writing, and the source address is usually located in the memory space of the host; the destination address of the data to be written It refers to the logical address on the remote storage node for writing the data to be written.

S103, the host may generate a write command conforming to a high-speed network storage protocol according to the key-value pair included in the write request. Specifically, the write command conforming to the high-speed network storage protocol may include: a first field for indicating the destination address of the data to be written; a second field for indicating the source address of the data to be written; in the third field indicating the size of the data to be written.

S105, after generating the write command, the host may send the write command to the remote storage node through the interface of the high-speed network storage protocol. The write command is used to trigger the remote storage node to write the data to be written stored at the source address into the physical address mapped by the destination address. Correspondingly, the remote storage node can receive the write command sent by the host through the interface of the high-speed network storage protocol.

S107, after receiving the write command sent by the host, the remote storage node may analyze the physical address mapped by the destination address.

S109: In response to the write command, the remote storage node writes the to-be-written data into the physical address mapped by the destination address.

The data writing method provided by the embodiment of the present invention is described below by taking NOF, a high-speed network storage protocol, as an example.

FIG. 3 shows the NVM commands involved in the embodiment of the present invention, which mainly include: a namespace identifier (NamespaceIdentifier, NSID), a starting logical block address (Starting LBA), a number of logical blocks (Number of LogicalBlocks), and a hash table (Scatter Gather). List, SGL) and other fields. The combination of NSID and Starting LBA can indicate the logical address involved in the command on the remote storage node, such as the destination address for writing data, or the source address for reading data; the number of logical blocks can indicate the data involved in the command Length, such as the length of the data to be written, or the length of the data to be read; SGL is a buffer area in the memory address space for storing data, such as the source address for storing the data to be written, or for storing The destination address of the data to be read.

In this embodiment of the present invention, an application may call a KV interface for writing data, such as KV_write(), to initiate the write request, so as to request the host to write the to-be-written data to the remote storage node. The key-value pair (key-value) carried by the write request can be shown in Table 1:

Key NSID Starting LBA Value SGL Length

Table 1

The key (key) may include: NSID and Starting LBA, which are used to indicate the destination address of the data to be written; the value (value) may include: SGL and Length, where SGL is used to indicate the data to be written. The source address, Length is used to indicate the size of the data to be written, which is equivalent to the number of logical blocks in the NVM command.

It should be noted that, if the write request is to write to the entire domain name space of the remote storage node (eg, full disk write), the key (key) may also include only the NSID.

It can be understood that from the NVM command shown in FIG. 3 and the key-value pair shown in Table 1, since the key-value pair contains the values of the first field, the second field and the third field in the write command , therefore, the host can fill the corresponding fields of the NVM write command according to the key-value pair carried in the write request. Here, other fields included in the NVM write command can be filled by the host according to the NVMe protocol. For details, please refer to NVM Express Revision 1.2, which will not be described here.

It should be noted that Table 1 is only a key-value pair designed for NVM write commands. For write commands of other types of high-speed network storage protocols, the key-value pairs carried in the write request involved in the embodiments of the present invention may not be included in the table. 1 Restriction, as long as the key of the key-value pair is used to indicate the destination address of the data to be written, and the value of the key-value pair is used to indicate the source address of the data to be written and the data to be written. size.

In this embodiment of the present invention, after the remote storage node receives the write command conforming to the high-speed network storage protocol sent by the host, the remote storage node can analyze the physical address mapped by the destination address represented by the first field.

Specifically, as shown in FIG. 4 , the storage device corresponding to the remote storage node may be integrated with multiple storage hard disks (eg, SSDs), and the multiple storage hard disks jointly map a continuous logical block address. As shown in FIG. 4 , a piece of data stored on the storage device corresponds to a logical block address, and the logical block address may actually map multiple discrete physical block addresses (Physical Block Address, PBA). For example, the data Data1 corresponds to the logical block address LBA-1, and LBA-1 maps to PBA-11, PBA-12 and other multi-segment PBAs. In specific implementation, the remote storage node can analyze the physical address mapped by the destination address represented by the first field through a Flash Translation Layer (FTL), and finally write the data to be written to the physical address middle.

Optionally, the data writing method provided in this embodiment of the present invention may further include S111 in FIG. 2 , that is: after writing the data to be written into the physical address mapped by the destination address, the remote The storage node may return a write response to the host through the interface of the high-speed network storage protocol. Correspondingly, the host can receive the write response returned by the remote storage node through the interface of the high-speed network storage protocol.

The following takes NOF, a high-speed network storage protocol, as an example, in conjunction with the message flow diagram shown in FIG. 5 , to describe the message processing process of writing data involved in the embodiment of the present invention in detail.

As shown in FIG. 5 , the message processing procedures corresponding to the above S101 to S109 may include: 1. An application program (APP) initiates a write request for a remote storage node by calling a KV interface for writing data, such as KV_write() , and pass the key-value pair key-value to the host through KV_write(); 2. The host generates a standard NVM write command according to the key-value pair passed in by the application, that is, NVM_Command in the figure; 3. The host sends the remote through the NOF interface The end storage node sends the standard NVM write command.

As shown in FIG. 5 , the message processing process corresponding to the above S111 may specifically include: 4. The host receives the write response returned by the remote storage node through the NOF interface, that is, the NVM_Response in the figure; 5. The host sends the data of the write response The format is converted into a KV interface for receiving write responses, such as KV_Get_Response(), a recognizable write response format, that is, the data format of KV_Response in the figure; 6. The application (APP) receives the KV interface, such as KV_Get_Response(), by dropping the KV interface. The write response returned by the remote storage node.

The above content describes the data writing method provided by the embodiment of the present invention in detail from the control level.

From a data level, the data writing method provided by the embodiment of the present invention may further include:

After receiving the write command sent by the host, the remote storage node may send an acquisition request for the data to be written to the host, where the acquisition request may include the source address of the data to be written; correspondingly, The host may receive a request for obtaining the data to be written sent by the remote storage node. After that, the host can respond to the acquisition request and send the data to be written stored at the source address to the remote storage node through the interface of the high-speed network storage protocol; correspondingly, the remote storage node can pass the The interface of the high-speed network storage protocol receives the data to be written sent by the host.

Further, in this embodiment of the present invention, the value (Value) in the key-value pair carried by the write request may further include: metadata (Metadata) of the data to be written, where the metadata is used to describe the A type of data that describes the attributes of the data to be written (such as service type, creation time, etc.). Correspondingly, the write command generated by the host and conforming to the high-speed network storage protocol further includes: a fourth field used to indicate the metadata of the data to be written.

That is to say, the write command received by the remote storage node further includes: a fourth field used to indicate the metadata of the data to be written. In a specific implementation, the remote storage node may store the destination address of the data to be written and the metadata of the data to be written in a target database in the target cache area in a one-to-one correspondence, where the target cache area is located in The memory address space of the remote storage node, which can provide a metadata access interface to the host. For example, the target database can be as shown in Table 2:

NSID Starting LBA Metadata 01 LBA-11 metadata1 01 LBA-12 metadata2 02 LBA-21 metadata3 … … …

Table 2

The combination of "NSID" and "Starting LBA" is used to indicate the destination address of the data to be written, and "Metadata" is used to indicate the metadata of the data to be written. It should be noted that Table 2 is only an implementation manner of the embodiment of the present invention, and may be different in practical applications, which should not be construed as a limitation.

Specifically, when the destination address of the data to be written and the metadata of the data to be written are stored in the target database in the target cache area in a one-to-one correspondence, the remote storage node may: determine the target Whether the destination address already exists in the database, if so, replace the metadata corresponding to the destination address in the target database with the metadata of the data to be written, otherwise, create a new mapping in the target database The relationship is used for correspondingly storing the destination address of the data to be written and the metadata of the data to be written.

In a specific implementation, the target database provides a data access interface to the host, which may include interfaces such as adding, deleting, modifying, and querying, for managing metadata in the target database.

It can be understood that, because the target cache area is located in the memory address space of the remote storage node, rather than the physical storage space on the storage hard disk corresponding to the storage node, the target database provided by the present invention can realize: The metadata of the data to be written is accessed in the memory of the remote storage node (that is, the target database) without having to search the metadata of the data to be written block by block on the storage hard disk, which realizes Efficient access and management of metadata of data written to the storage hard disk.

Implementing this embodiment of the present invention, after receiving a write request sent by an application for a remote storage node (the write request carries a key-value pair, the key is used to indicate the destination address of the data to be written, and the value is used to After indicating the source address of the data to be written and the size of the data to be written), the host can generate a write command conforming to the high-speed network storage protocol according to the key-value pair, and send it to the high-speed network storage protocol through the interface of the high-speed network storage protocol. The remote storage node sends the write command to trigger the remote storage node to write the data to be written into the physical address mapped by the destination address. The data writing method can realize that the KV interface for writing data is carried on the high-speed network storage protocol for network storage, so that the application program can realize the remote storage node through the KV interface for writing data. The data write operation is compatible with the respective storage advantages of KV storage and the high-speed network storage protocol.

Referring to FIG. 6, FIG. 6 is a schematic flowchart of a data reading method provided by an embodiment of the present invention. As shown in Figure 6, the method includes:

S201, the host receives a read request for a remote storage node, the read request carries a key-value pair consisting of a key and a value, the key is used to indicate the source address of the data to be read, and the value is used to indicate the The destination address of the data to be read and the size of the data to be read. Specifically, the read request may be a request initiated by an application program (APP) on the host by calling a KV interface for reading data, such as KV_read( ). In practical applications, the read request may also be a request initiated by a remote application program calling a KV interface for reading data, which is not limited here.

Here, the source address of the data to be read refers to the logical address on the remote storage node used to store the data to be read before reading; the destination address of the data to be read refers to the For storing the address of the read data to be read, the destination address is usually located in the memory space of the host.

S203, the host may generate a read command conforming to the high-speed network storage protocol according to the key-value pair included in the read request. Specifically, the read command may include: a first field for indicating the source address of the data to be read, a second field for indicating the destination address of the data to be read, and a second field for indicating the data to be read. The third field of the size of the data to be read.

S205, after generating the read command, the host may send the read command to the remote storage node through the interface of the high-speed network storage protocol. Correspondingly, the remote storage node can receive the read command sent by the host through the interface of the high-speed network storage protocol.

S207, after receiving the read command sent by the host, the remote storage node may analyze the physical address mapped by the source address.

Specifically, for the method of analyzing the physical address mapped by the source address, reference may be made to the relevant content in the method embodiment in FIG. 2 , which will not be repeated here.

S209, the remote storage node reads the data to be read from the physical address mapped by the source address in response to the read command.

The data to be read involved in the embodiment of the present invention may be written to a storage device corresponding to a remote storage node by using the data writing method provided in the method embodiment of FIG. 2 . It should be noted that, in practical applications, the data to be read may also be written to the storage device through other means, which is not limited here.

The data reading method provided by the embodiment of the present invention is described below by taking NOF, a high-speed network storage protocol, as an example. FIG. 3 shows an NVM command, and the specific format can refer to the relevant content in the method embodiment of FIG. 2 , and details are not repeated here.

In this embodiment of the present invention, an application may call a KV interface for reading data, such as KV_read(), to initiate the read request, so as to request the host to read the data to be read from the remote storage node. The key-value pair (key-value) carried by the read request can be shown in Table 3:

Key NSID Starting LBA Value SGL Length

table 3

The key (key) may include: NSID and Starting LBA, which are used to indicate the source address of the data to be read; the value (value) may include: SGL, Length, where SGL is used to indicate the data to be read. The destination address, Length is used to indicate the size of the data to be read, which is equivalent to the number of logical blocks in the NVM command.

It should be noted that, if the read request is for writing to the entire domain name space of the remote storage node (eg, full disk read), the key (key) may also include only the NSID.

It can be understood from the NVM read and write commands shown in FIG. 3 and the key-value pairs shown in Table 3 that the host can fill corresponding fields of the NVM read command according to the key-value pairs carried in the read request. Here, other fields included in the NVM read command can be filled by the host according to the NVMe protocol. For details, please refer to NVM Express Revision 1.2, which will not be repeated here.

It should be noted that Table 3 is only a key-value pair designed for NVM read commands. For read commands of other types of high-speed network storage protocols, the key-value pairs carried in the read request involved in the embodiment of the present invention may not be included in the table. 3 Restrictions, as long as the key of the key-value pair is used to indicate the source address of the data to be read, and the value of the key-value pair is used to indicate the destination address of the data to be read and the data to be read size.

Optionally, the data reading method provided in the embodiment of the present invention may further include S211 in FIG. 6 , that is: after reading the to-be-read data from the physical address mapped by the source address, remote The end storage node can return a read response to the host through the interface of the high-speed network storage protocol. Correspondingly, the host can receive the read response returned by the remote storage node through the interface of the high-speed network storage protocol.

The following takes NOF, a high-speed network storage protocol, as an example, in conjunction with the message flow diagram shown in FIG. 5 , to describe the message processing process of reading data involved in the embodiment of the present invention in detail.

As shown in FIG. 5 , the message processing procedures corresponding to the above S201 to S209 may include: 1. An application program (APP) initiates a read request for a remote storage node by calling a KV interface for reading data, such as KV_read( ). , and pass the key-value pair key-value to the host through KV_read(); 2. The host generates a standard NVM read command according to the key-value pair passed in by the application, that is, NVM_Command in the figure; 3. The host sends the remote through the NOF interface The end storage node sends the standard NVM read command.

As shown in FIG. 5 , the message processing process corresponding to the above S211 may specifically include: 4. The host receives the read response returned by the remote storage node through the NOF interface, that is, the NVM_Response in the figure; 5. The host sends the data of the read response The format is converted into a KV interface, such as KV_Get_Response(), the read response format that can be recognized, that is, the data format of KV_Response in the figure; 6. The application (APP) receives the response returned by the remote storage node through the KV interface, such as KV_Get_Response(). Read response.

The above content describes the data reading method provided by the embodiment of the present invention in detail from the control level.

From a data level, the data reading method provided in the embodiment of the present invention may further include:

After receiving the read command sent by the host, the remote storage node may send a sending request for the data to be read to the host, where the sending request includes the destination address of the data to be read; correspondingly, the host The sending request sent by the remote storage node can be received, and a response to the sending request is returned to the remote storage node. Afterwards, the remote storage node can receive the response returned by the host, and send the data to be read to the host through the high-speed network storage protocol interface; correspondingly, the host can pass the high-speed network The interface of the storage protocol receives the data to be read sent by the remote storage node, and stores the data to be read at the destination address.

Implementing the embodiment of the present invention, after receiving a read request sent by an application for a remote storage node (the read request carries a key-value pair, the key is used to indicate the source address of the data to be read, and the value is used to After indicating the destination address of the data to be read and the size of the data to be read), the host can generate a read command conforming to the high-speed network storage protocol according to the key-value pair, and send it to the high-speed network storage protocol through the interface of the high-speed network storage protocol. The remote storage node sends the read command to trigger the remote storage node to read the to-be-read number from the physical address mapped by the source address. The data reading method can realize that the KV interface used for reading data is carried on the high-speed network storage protocol used for network storage, so that the application program can read the remote storage node through the KV interface used for reading data. Data operation is compatible with the respective storage advantages of KV storage and the high-speed network storage protocol.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a data writing device provided by an embodiment of the present invention. As shown in FIG. 7 , the data writing device 10 may include: a first receiving unit 101 , a writing command generating unit 103 and a writing command sending unit 105 .

in:

The first receiving unit 101 is configured to receive a write request for a remote storage node, where the write request carries a key-value pair consisting of a key and a value, wherein the key is used to indicate the destination address of the data to be written, The value is used to indicate the source address of the data to be written and the size of the data to be written;

The write command generating unit 103 is configured to generate a write command that conforms to the high-speed network storage protocol according to the key-value pair; the write command includes: a first field used to indicate the destination address of the data to be written, used for a second field indicating the source address of the data to be written, and a third field for indicating the size of the data to be written;

A write command sending unit 105, configured to send the write command to the remote storage node through the interface of the high-speed network storage protocol, trigger the remote storage node to respond to the write command, and store the data in the source address. The data to be written at is written into the physical address mapped by the destination address.

As shown in FIG. 7 , the data writing device 10 may further include: a second receiving unit 107 and a data sending unit 109, wherein:

The second receiving unit 107 can be configured to receive, after the write command sending unit 105 sends the write command to the remote storage node through the interface of the high-speed network storage protocol, a message sent by the remote storage node for the to-be-to-be-storage node. an acquisition request for writing data, where the acquisition request includes the source address of the data to be written;

The data sending unit 109 may be configured to, in response to the obtaining request, send the to-be-written data stored at the source address to the remote storage node through the interface of the high-speed network storage protocol.

In this embodiment of the present invention, the value in the key-value pair may further include: metadata of the data to be written, and accordingly the write command may further include: a metadata used to indicate the data to be written The fourth field of data.

It can be understood that, for the specific implementation of the functional units included in the data writing device 10, reference may be made to the function of the host described in the method embodiment of FIG. 2, and details are not repeated here.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a storage node according to an embodiment of the present invention. The storage node 20 corresponds to the data writing device 10 shown in FIG. 7 , and is configured to receive a write command sent by the data writing device 10 that conforms to the high-speed network storage protocol, and perform a write operation. As shown in FIG. 8 , the storage node 20 may include: a write command receiving unit 201 , a saving unit 203 , an analyzing unit 205 and a writing unit 207 . in:

A write command receiving unit 201, configured to receive a write command that conforms to the high-speed network storage protocol sent by the host through the interface of the high-speed network storage protocol; the write command includes: a first field for indicating the destination address of the data to be written , a second field for indicating the source address of the data to be written, a third field for indicating the size of the data to be written, a fourth field for indicating the metadata of the data to be written field;

The storage unit 203 is configured to store the destination address of the data to be written and the metadata of the data to be written in a target database in the target cache area in a one-to-one correspondence, and the target database provides the host with metadata access interface

An analysis unit 205, configured to analyze the physical address mapped by the destination address;

The writing unit 207 is configured to, in response to the writing command, write the data to be written into the physical address mapped by the destination address.

As shown in FIG. 8, the storage node 20 may further include: a sending unit 211 and a data receiving unit 209, wherein:

The sending unit 211 can be configured to, after the write command receiving unit 201 receives the write command that conforms to the high-speed network storage protocol sent by the host through the interface of the high-speed network storage protocol, to the host to send an acquisition request for the data to be written , the acquisition request includes the source address of the data to be written;

The data receiving unit 209 can be configured to receive the to-be-written data sent by the host in response to the acquisition request through the interface of the high-speed network storage protocol.

In a specific implementation, the storage unit may be specifically configured to: determine whether the destination address already exists in the target database, and if so, replace the metadata corresponding to the destination address in the target database with the to-be-to-be Write the metadata of the data, otherwise, create a new mapping relationship in the target database for correspondingly storing the destination address of the data to be written and the metadata of the data to be written.

It can be understood that, for the specific implementation of the functional units included in the storage node 20, reference may be made to the functions of the remote storage node described in the method embodiment of FIG. 2, which will not be repeated here.

In order to facilitate the implementation of the embodiments of the present invention, the present invention provides another data writing device. 9, the data writing device 90 may include: a transmitter 903, a receiver 904, a memory 902, and a processor 901 coupled with the memory 902 (the number of the processors 901 in the data writing device 90 may be one or more, FIG. 9 takes a processor as an example). In some embodiments of the present invention, the transmitter 903 , the receiver 904 , the memory 902 and the processor 901 may be connected by a bus or in other ways, wherein the connection by a bus is taken as an example in FIG. 9 .

The transmitter 903 is used for sending data to the remote storage node, and the receiver 904 is used for receiving data from the remote storage node. In a specific implementation, the transmitter 903 and the receiver 904 may be integrated into transceiver devices such as a wireless transceiver module, a wired transceiver module, and the like. The memory 902 is used to store program codes. In specific implementation, the memory 902 may be a read only memory (Read Only Memory, ROM), which may be used to store the implementation code of the data writing method described in the foregoing method embodiment of FIG. 2 . The processor 901, such as a CPU, is used to invoke the program code stored in the memory 902 to perform the following steps:

A write request for a remote storage node is received, and the write request carries a key-value pair consisting of a key and a value, wherein the key is used to indicate the destination address of the data to be written, and the value is used to indicate the The source address of the data to be written and the size of the data to be written; the write request is a request initiated by an application calling the key-value storage interface for writing data, and the key-value storage interface for writing data The input parameter includes the key-value pair;

According to the key-value pair, a write command conforming to the high-speed network storage protocol is generated; the write command includes: a first field used to indicate the destination address of the data to be written, a field used to indicate the data to be written a second field of the source address, and a third field used to indicate the size of the data to be written;

Using the transmitter 903 to send the write command to the remote storage node through the interface of the high-speed network storage protocol, the remote storage node is triggered to respond to the write command, and the The data to be written is written into the physical address mapped by the destination address.

In this embodiment of the present invention, after using the transmitter 903 to send the write command to the remote storage node, the processor 901 may further:

Utilize the receiver 904 to receive the acquisition request for the data to be written sent by the remote storage node, where the acquisition request includes the source address of the data to be written;

In response to the acquisition request, the to-be-written data stored at the source address is sent to the remote storage node by using the transmitter 903 through the interface of the high-speed network storage protocol.

Further, the value in the key-value pair may further include: metadata of the data to be written, and the write command further includes: a fourth parameter used to indicate the metadata of the data to be written field.

It is understandable that, for the execution steps of the processor 901, reference may also be made to the content involved in the host described in the method embodiment of FIG. 2, which will not be repeated here.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of a data reading device provided by an embodiment of the present invention. As shown in FIG. 10 , the data reading device 30 may include: a first receiving unit 301 , a read command generating unit 303 and a read command sending unit 305 .

in:

The first receiving unit 301 is configured to receive a read request for a remote storage node, where the read request carries a key-value pair consisting of a key and a value, wherein the key is used to indicate the source address of the data to be read, The value is used to indicate the destination address of the data to be read and the size of the data to be read;

The read command generating unit 303 is configured to generate a read command conforming to the high-speed network storage protocol according to the key-value pair; the read command includes: a first field for indicating the source address of the data to be read, for a second field indicating the destination address of the data to be read, and a third field for indicating the size of the data to be read;

The read command sending unit 305 is configured to send the read command to the remote storage node through the interface of the high-speed network storage protocol, and trigger the remote storage node to respond to the read command, from the physical address mapped by the source address. The data to be read is read from the address.

As shown in FIG. 10, the data reading device 30 may further include: a second receiving unit 307, a response unit 309 and a data receiving unit 311, wherein:

The second receiving unit 307 can be configured to receive, after the read command sending unit sends the read command to the remote storage node through the interface of the high-speed network storage protocol, receive a message sent by the remote storage node for the to-be-read A sending request for fetching data, where the sending request includes the destination address of the data to be read;

The response unit 309 can be configured to respond to the sending request, and return a response to the remote storage node for the sending request;

The data receiving unit 311 can be configured to receive the data to be read sent by the remote storage node through the interface of the high-speed network storage protocol, and store the data to be read at the destination address.

It can be understood that, for the specific implementation of the functional units included in the data reading device 30, reference may be made to the function of the host described in the method embodiment of FIG. 6, and details are not repeated here.

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of a storage node according to an embodiment of the present invention. The storage node 40 corresponds to the data reading device 30 shown in FIG. 9 , and is configured to receive a read command sent by the data reading device 30 that conforms to the high-speed network storage protocol, and perform a read operation. As shown in FIG. 11 , the storage node 40 may include: a read command receiving unit 401 , an analysis unit 403 and a read unit 405 . in:

The read command receiving unit 401 is configured to receive, through an interface of a high-speed network storage protocol, a read command that is sent by a host and conforms to the high-speed network storage protocol; the read command includes: a first address for indicating the source address of the data to be read a field, a second field for indicating the destination address of the data to be read, and a third field for indicating the size of the data to be read;

An analysis unit 403, configured to analyze the physical address mapped by the source address;

The reading unit 405 is configured to read the data to be read from the physical address mapped by the source address in response to the read command.

As shown in FIG. 11, the storage node 40 may further include: a sending unit 407, a response receiving unit 409 and a data sending unit 411, wherein:

The sending unit 407 can be configured to send a sending request for the data to be read to the host after the reading unit reads the data to be read from the physical address mapped by the source address, The sending request includes the destination address of the data to be read;

A response receiving unit 409, configured to receive a response to the sending request returned by the host;

The data sending unit 411 can be configured to send the data to be read to the host through an interface of a high-speed network storage protocol.

It can be understood that, for the specific implementation of the functional units included in the storage node 40, reference may be made to the functions of the remote storage node described in the method embodiment in FIG. 6 , and details are not repeated here.

In order to facilitate the implementation of the embodiments of the present invention, the present invention provides another data reading device. 12, the data reading device 100 may include: a transmitter 1003, a receiver 1004, a memory 1002, and a processor 1001 coupled with the memory 1002 (the number of the processors 1001 in the data reading device 100 may be one or more, FIG. 12 takes a processor as an example). In some embodiments of the present invention, the transmitter 1003 , the receiver 1004 , the memory 1002 and the processor 1001 may be connected by a bus or in other ways, wherein the connection by a bus is taken as an example in FIG. 12 .

The transmitter 1003 is used for sending data to the remote storage node, and the receiver 1004 is used for receiving data from the remote storage node. In specific implementation, the transmitter 1003 and the receiver 1004 may be integrated into transceiver devices such as a wireless transceiver module, a wired transceiver module, and the like. The memory 1002 is used to store program codes. In specific implementation, the memory 1002 can be a read only memory (Read Only Memory, ROM), which can be used to store the implementation code of the data reading method described in the foregoing method embodiment of FIG. 6 . The processor 1001, such as a CPU, is used to invoke the program code stored in the memory 1002 to perform the following steps:

A read request for the remote storage node is received, and the read request carries a key-value pair consisting of a key and a value, wherein the key is used to indicate the source address of the data to be read, and the value is used to indicate the The destination address of the data to be read and the size of the data to be read; the read request is a request initiated by an application calling the key-value storage interface for reading data, and the key-value storage interface for reading data The input parameter includes the key-value pair;

According to the key-value pair, a read command conforming to the high-speed network storage protocol is generated; the read command includes: a first field used to indicate the source address of the data to be read, a field used to indicate the data to be read a second field of the destination address, and a third field used to indicate the size of the data to be read;

The transmitter 1003 is used to send the read command to the remote storage node through the interface of the high-speed network storage protocol, and the remote storage node is triggered to respond to the read command and read from the physical address mapped by the source address. the data to be read.

In this embodiment of the present invention, after reading the data to be read from the physical address mapped from the source address, the processor 1001 may further:

Using the transmitter 1003 to send a sending request for the data to be read to the host, the sending request including the destination address of the data to be read;

The response to the sending request returned by the host is received by the receiver 1004, and the data to be read is sent to the host by the transmitter 1003 through the interface of the high-speed network storage protocol.

It is understandable that, for the execution steps of the processor 1001, reference may also be made to the content involved in the host described in the embodiment of FIG. 6, which will not be repeated here.

In addition, an embodiment of the present invention provides a storage system (as shown in FIG. 1 ), where the storage system includes: a host and a remote storage node. Wherein: the host may be the data writing device 10 described in FIG. 7 , and the remote storage node may be the storage node 20 described in FIG. 8 .

It should be noted that the host may be the host mentioned in the method embodiment of FIG. 2 , and the remote storage node may be the remote storage node mentioned in the method embodiment of FIG. 2 , which will not be repeated here.

An embodiment of the present invention further provides a storage system (as shown in FIG. 1 ), where the storage system includes: a host and a remote storage node. Wherein: the host may be the data reading device 30 described in FIG. 10 , and the remote storage node may be the storage node 40 described in FIG. 11 .

It should be noted that the host may be the host mentioned in the method embodiment of FIG. 6 , and the remote storage node may be the remote storage node mentioned in the method embodiment of FIG. 6 , which will not be repeated here.

To sum up, by implementing the embodiments of the present invention, the host can generate a read and write command that conforms to the high-speed network storage protocol according to the key-value pair carried by the read and write request sent by the application to the remote storage node. The read and write request is a request initiated by the application program by calling the key-value storage interface; and, the host can send the read and write data that conforms to the high-speed network storage protocol to the remote storage node through the transmission interface that conforms to the high-speed network storage protocol. command to trigger the remote storage node to respond to the read and write commands conforming to the high-speed network storage protocol to complete remote read and write operations. The above solution can implement the key-value storage interface to be carried on the high-speed network storage protocol, so that applications can read and write operations to the remote storage node through the key-value storage interface, which is compatible with key-value storage and the high-speed network. The storage advantages of the respective storage protocols.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program is During execution, it may include the processes of the embodiments of the above-mentioned methods. The storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM) or the like.

Claims (20)

1. A method of data processing, the method comprising:

the host acquires a key value pair carried by a read-write request aiming at a remote storage node;

the host generates a read-write command conforming to a high-speed network storage protocol according to the key value pair carried by the read-write request aiming at the remote storage node;

the host sends the read-write command conforming to the high-speed network storage protocol to the remote storage node through the transmission interface conforming to the high-speed network storage protocol so as to trigger the remote storage node to respond to the read-write command conforming to the high-speed network storage protocol to complete the operation of the read-write request aiming at the remote storage node.

2. The method of claim 1, wherein the high-speed network storage protocol comprises NVMe overlay fabric protocol.

3. The method of claim 1, wherein the read/write request to the remote storage node carries a key-value pair consisting of a key and a value.

4. The method of claim 1, wherein the read and write requests comprise requests initiated by the application by invoking a key-value store interface.

5. The method according to any one of claims 1 to 4, wherein when the read-write request for the remote storage node is a write request, a key carried in the read-write request for the remote storage node is used to indicate a destination address of data to be written, and the value includes a source address used to indicate the data to be written, where the destination address of the data to be written is used to indicate a logical address used for the data to be written in the remote storage node, and the source address of the data to be written is used to indicate an address used for storing the data to be written in the host.

6. The method of claim 5, wherein the value further comprises a size indicating the data to be written.

7. The method of claim 5, wherein the host generates the read/write command conforming to the high-speed network storage protocol, and the read/write command comprises: the data writing device comprises a first field used for indicating the destination address of the data to be written and a second field used for indicating the source address of the data to be written.

8. The method of claim 7, wherein the host generates the read and write commands conforming to the high speed network storage protocol further comprises: a third field for indicating a size of the data to be written.

9. The method of claim 7, wherein the value of the read/write request for the remote storage node further comprises: if the metadata of the data to be written is metadata, the read-write command for the remote storage node further includes: a fourth field for indicating metadata of the data to be written.

10. The method of claim 5, wherein after sending the write command to the remote storage node over the interface of the high speed network storage protocol, the method further comprises:

receiving an acquisition request aiming at the data to be written, which is sent by the remote storage node, wherein the acquisition request comprises a source address of the data to be written;

and responding to the acquisition request, and sending the data to be written stored at the source address to the remote storage node through an interface of the high-speed network storage protocol.

11. The method according to any one of claims 1 to 4, wherein when the read/write request for the remote storage node is a read request, the read request carries a key-value pair consisting of a key and a value, wherein the key is used for indicating a source address of data to be read, and the value is used for indicating a destination address of the data to be read and a size of the data to be read; the read request is a request initiated by an application by calling a key-value store interface for reading data.

12. The method of claim 11, wherein generating the read command compliant with the high speed network storage protocol comprises: the device comprises a first field used for indicating the source address of the data to be read and a second field used for indicating the destination address of the data to be read.

13. The method of claim 11, wherein generating the read command compliant with the high speed network storage protocol further comprises: a third field to indicate a size of the data to be read.

14. The method of claim 11, after sending the read command to a remote storage node through the interface of the high speed network storage protocol, further comprising:

receiving a sending request aiming at the data to be read, which is sent by the remote storage node, wherein the sending request comprises a destination address of the data to be read;

responding to the sending request, and returning a response to the remote storage node aiming at the sending request;

and receiving the data to be read sent by the remote storage node through an interface of the high-speed network storage protocol, and storing the data to be read to the destination address.

15. A method of data processing, the method comprising:

a remote storage node receives a read-write command which is sent by a host and accords with a high-speed network storage protocol through an interface of the high-speed network storage protocol;

the remote storage node analyzes the address of the remote storage node to be operated by the read-write command conforming to the high-speed network storage protocol according to the read-write command conforming to the high-speed network storage protocol;

and the remote storage node finishes the operation of the read-write command conforming to the high-speed network storage protocol.

16. The method of claim 15, wherein when the read/write command conforming to the high speed network storage protocol is a write command, the write command comprises: the data writing device comprises a first field used for indicating a destination address of data to be written, a second field used for indicating a source address of the data to be written, a third field used for indicating the size of the data to be written and a fourth field used for indicating metadata of the data to be written.

17. The method of claim 16, wherein the analyzing, by the remote storage node, the address of the remote storage node to be operated by the read/write command conforming to the high-speed network storage protocol according to the read/write command conforming to the high-speed network storage protocol comprises:

the remote storage node stores the destination address of the data to be written and the metadata of the data to be written in a target database in a target cache region in a one-to-one correspondence manner, and the target database provides a metadata access interface for the host;

the remote storage node analyzes a physical address mapped by the destination address;

and the remote storage node responds to the write command and writes the data to be written into the physical address mapped by the destination address.

18. The method according to claim 15, wherein when the read/write command conforming to the high speed network storage protocol is a read command, the read request carries a key-value pair consisting of a key and a value, wherein the key is used for indicating a source address of data to be read, and the value is used for indicating a destination address of the data to be read and a size of the data to be read; the read request is a request initiated by an application by calling a key-value store interface for reading data.

19. The method of claim 18, wherein the analyzing, by the remote storage node, the address of the remote storage node to be operated by the read/write command conforming to the high-speed network storage protocol according to the read/write command conforming to the high-speed network storage protocol comprises:

generating a read command conforming to a high-speed network storage protocol according to the key value pair; the read command includes: the data reading device comprises a first field used for indicating a source address of the data to be read, a second field used for indicating a destination address of the data to be read and a third field used for indicating the size of the data to be read;

and sending the read command to a remote storage node through an interface of the high-speed network storage protocol, triggering the remote storage node to respond to the read command, and reading the data to be read from the physical address mapped by the source address.

20. A storage system comprising a host computer adapted to implement the operational steps of the method of any one of the preceding method claims 1 to 14 and a remote storage node adapted to implement the operational steps of the method of any one of the preceding method claims 15 to 19.

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