CN116112498A - A node IO forwarding method, device and medium of a multi-control cluster - Google Patents

Abstract

The invention discloses a node IO forwarding method, device and medium of a multi-control cluster, which are applicable to the field of network technology. This method breaks up the volume space according to the stripe width and the mirror pair nodes, and divides the volume space into data areas corresponding to the mirror pair nodes, so as to ensure the balance of the load in each mirror pair node, and avoid the existing volume-based granularity, which only uses A node accesses the current volume, resulting in low load balancing. Determine the current request data area according to the request address and data length of the IO request, and determine the forwarding to the corresponding mirror pair node according to the relationship between the request data area and the data area, avoiding the inefficiency caused by existing multiple nodes accessing a single volume According to the problem, the data area is forwarded to the corresponding mirror pair node, and the stripe lock-free optimization mechanism is implemented with the data area as the granularity to improve the availability of the multi-control storage system.

Description

A node IO forwarding method, device and medium of a multi-control cluster

technical field

The present invention relates to the field of network technology, in particular to a node IO forwarding method, device and medium of a multi-control cluster.

Background technique

In recent years, in the field of storage, dual-controller storage devices with single-mirror and dual-copy cannot meet the availability and security requirements of high-end storage systems.

Figure 1 is a schematic diagram of the existing dual-copy four-control cluster storage system accessing a single volume. As shown in Figure 1, with the increase of nodes in the storage system, if only the preferred node in the single-mirror pair can access the single-volume Mechanism, there will be a lower degree of load balancing. If multiple nodes are used to access a single volume, the input and output (IO) efficiency of multiple nodes accessing a single volume will be limited due to the back-end disk array (Redundant Arrays of Independent Disks, RAID) stripe lock mechanism.

Therefore, it is urgent for those skilled in the art to seek a node IO forwarding method for a multi-control cluster.

Contents of the invention

The purpose of the present invention is to provide a node IO forwarding method, device and medium of a multi-control cluster, to implement a stripe-lock-free optimization mechanism at the granularity of the data area, and to improve the usability of a multi-control storage system.

In order to solve the above technical problems, the present invention provides a node IO forwarding method of a multi-control cluster, including:

Obtain the mirror pair node of the multi-control cluster, and divide the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror pair node, wherein the data area is located at the mirror pair node Inside;

Receive the request address information and the request data length of the current IO request, and determine the corresponding request data area according to the request address information and the request data length;

Forwarding the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and the plurality of data areas.

Preferably, the volume corresponding to the multi-control cluster is divided into multiple data areas according to the RAID stripe width and the mirror pair node, including:

Obtain the width data of the RAID stripe width;

dividing the volume corresponding to the multi-control cluster into multiple data blocks according to the width data;

Processing the multiple data blocks according to the node number of the mirror pair node to obtain the data area corresponding to the mirror pair node.

Preferably, the processing of multiple data blocks according to the number of nodes of the mirror pair node to obtain the data area corresponding to the mirror pair node includes:

Perform numbering processing on the mirror pair node and the plurality of data blocks respectively;

Using the number of nodes as a divisor, performing remainder processing on a plurality of the data blocks to obtain a corresponding remainder;

Divide the data block to which the remainder belongs to the mirror pair node corresponding to the mirror pair node with the same number.

Preferably, before receiving the request address information and request data length of the current IO request, it also includes:

Obtain the online path logic value of the volume corresponding to the multi-control cluster and the mirror pair node logic value;

performing logical AND processing on the online path logical value and the mirror image pair node logical value to obtain a first logical value;

taking the node corresponding to the first logic value as a set of forwarding target nodes of the multiple data areas;

Inverting the first logical value to obtain a second logical value, and using the nodes corresponding to the second logical value as a set of forwarding source nodes of the multiple data areas.

Preferably, determining the corresponding request data area according to the request address information and the request data length includes:

Obtain the number of bytes occupied by the address information corresponding to the RAID stripe width;

Obtain the number of bytes occupied by the request address information;

performing remainder processing on the number of bytes occupied by the requested address information and the number of bytes occupied by the address information corresponding to the RAID stripe width to obtain a corresponding initial data block;

determining a termination data block according to the request data length and the request address information;

Determine the corresponding requested data area according to the relationship between the initial data block and the terminated data block.

Preferably, the forwarding of the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and multiple data areas includes:

When the initial data block and the termination data block are the same data block, determining that the requested data area is a data area;

determining the mirror pair node according to the positions of the requested data area in the plurality of data areas;

When the initial data block and the terminating data block are not the same data block, determine that the requested data area spans multiple data areas;

The corresponding mirror pair node is determined according to the positions of the spanning multiple data areas.

Preferably, determining the mirror pair node includes:

determining forwarding node information corresponding to the requested data area;

When the forwarding node information is in the forwarding source node set, obtain a corresponding forwarding target node according to the forwarding source node set;

Forwarding the current IO request to the forwarding target node to determine the mirror pair node.

In order to solve the above technical problems, the present invention also provides a node IO forwarding device of a multi-control cluster, including:

A division module, configured to obtain the mirror pair nodes of the multi-control cluster, and divide the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror pair nodes, wherein the data areas are located at In the mirror pair node;

A determining module, configured to receive request address information and request data length of the current IO request, and determine a corresponding request data area according to the request address information and the request data length;

A forwarding module, configured to forward the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and a plurality of the data areas.

In order to solve the above technical problems, the present invention also provides a node IO forwarding device of a multi-control cluster, including:

memory for storing computer programs;

The processor is configured to implement the steps of the node IO forwarding method of the multi-control cluster as described above when executing the computer program.

In order to solve the above-mentioned technical problems, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned multi-control cluster The steps of the node IO forwarding method.

A node IO forwarding method of a multi-control cluster provided by the present invention includes: obtaining a mirror pair node of the multi-control cluster, and dividing the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror pair node, The data area is located in the mirror pair node; receive the request address information and request data length of the current IO request, and determine the corresponding request data area according to the request address information and request data length; pair according to the relationship between the request data area and multiple data areas The current IO request is forwarded to the mirror pair node corresponding to the data area. This method breaks up the volume space according to the stripe width and the mirror pair nodes, and divides the volume space into data areas corresponding to the mirror pair nodes, so as to ensure the balance of the load in each mirror pair node, avoiding the existing volume-based granularity, and only using A node accesses the current volume, resulting in low load balancing. Determine the current request data area according to the request address and data length of the IO request, and determine the forwarding to the corresponding mirror pair node according to the relationship between the request data area and the data area, avoiding the inefficiency caused by existing multiple nodes accessing a single volume According to the problem, the data area is forwarded to the corresponding mirror pair node, and the stripe lock-free optimization mechanism is implemented with the data area as the granularity to improve the availability of the multi-control storage system.

In addition, the present invention also provides a multi-control cluster node IO forwarding device and medium, which have the same beneficial effect as the above-mentioned multi-control cluster node IO forwarding method.

Description of drawings

In order to illustrate the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic diagram of accessing a single volume by an existing dual-copy four-control cluster storage system;

FIG. 2 is a flow chart of a node IO forwarding method of a multi-control cluster provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of dividing a data area provided by an embodiment of the present invention;

FIG. 4 is a structural diagram of a node IO forwarding device of a multi-control cluster provided by an embodiment of the present invention;

FIG. 5 is a structural diagram of another multi-control cluster node IO forwarding device provided by an embodiment of the present invention;

FIG. 6 is a flow chart of another node IO forwarding method of a multi-control cluster provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The core of the present invention is to provide a node IO forwarding method, device and medium of a multi-control cluster, which implements a stripe lock-free optimization mechanism at the granularity of the data area, and improves the usability of a multi-control storage system.

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

It should be noted that what RAID provides to the operating system is a volume, which is continuous sector space, and what the volume presents to the file system is a partition. Compared with a volume, a partition is to divide a large continuous address again. The RAID stripe lock mechanism is that when multiple nodes access a single volume, they need to wait for the lock permission, which reduces the access IO efficiency, especially on the business side. The performance requirements of the storage device are continuously upgraded. If the IO efficiency is unacceptable . The node IO forwarding method of the multi-control cluster provided by the present invention can solve the above-mentioned technical problems, so as to perform strip lock-free optimization under the premise of ensuring load balance.

FIG. 2 is a flow chart of a node IO forwarding method of a multi-control cluster provided by an embodiment of the present invention. As shown in FIG. 2 , the method includes:

S11: Obtain the mirror pair node of the multi-control cluster, and divide the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror pair node, wherein the data area is located in the mirror pair node;

S12: Receive the request address information and request data length of the current IO request, and determine the corresponding request data area according to the request address information and the request data length;

S13: According to the relationship between the requested data area and multiple data areas, the current IO request is forwarded to the mirror pair node corresponding to the data area.

Specifically, to obtain the mirror pair node of the multi-control cluster, the multi-control cluster may be a dual-copy four-control cluster, or a double-copy dual-control cluster, which is not limited here. In order to realize the high availability service of the system and solve the problem of one server failure, other servers will take over the application, so as to provide continuous and reliable services. The cluster software is different from the dual-machine software. Flexible setting of takeover policies among multiple servers. For mirror pairs, the number of mirror pairs varies depending on the multi-control cluster. For example, a dual-copy four-control cluster has 4 mirror pairs, corresponding to 4 nodes. The mirror pairs are: node 0 and node 1; node 1 and node 2; node 2 and node 3; node 3 and node 0. A dual-copy dual-controller cluster consists of two mirror pairs, node 0 and node 1.

According to the RAID stripe width and mirroring, the nodes are divided into the volumes corresponding to the multi-control cluster. The existing volume is used as the granularity for IO forwarding. In this embodiment, the volumes are broken up according to the stripe width and distributed to the multi-control cluster. Multiple nodes in order to improve load balancing. The corresponding division is based on the RAID stripe width, which can be divided according to the bandwidth data alignment of the stripe width, or can be divided according to the number of nodes. Based on the RAID stripe lock mechanism, the same stripe width corresponds to one node access. As an embodiment, the volume is divided by the RAID stripe width.

As an implementation manner, the volume corresponding to the multi-controller cluster is divided into multiple data areas according to the RAID stripe width and mirror pair nodes, including:

Obtain the width data of the RAID stripe width;

Divide the volume corresponding to the multi-control cluster into multiple data blocks according to the width data;

The multiple data blocks are processed according to the number of nodes of the mirror pair node to obtain a data area corresponding to the mirror pair node.

Specifically, the width data of the RAID stripe width is obtained, and the width data is the occupied space, and the volume is divided into multiple data blocks according to the width data. For example, the back-end RAID stripe width is 32M. Align the stripe width and divide the volume into several data blocks according to 32M. The data blocks need to be assigned to each mirror pair node. The block is processed to obtain the data area corresponding to the mirror pair node.

It should be noted that in the multi-controller cluster, the data area adopts the form of double copy. If there are 4 data areas, each node corresponds to 2 data areas to realize double copy.

Receive the request address information and request data length of the current IO request. The existing management IO coordinates the operation between the file system, volume, and disk driver. The IO management sends the request to the file system module, and the file system sends the file corresponding to the The logical offset is mapped to the LBA address offset of the volume, and the interface of the volume management disk driver is called through the IO request, and the file system calls the interface of the volume management software for the IO management request. The volume management software translates and maps the LBA address offset corresponding to the volume into the LBA address offset corresponding to the actual physical disk, and requests to call the disk controller driver. IO management requests call the disk controller driver. Write the data of the corresponding LBA address segment from the memory to a physical disk. This embodiment is the same as the existing IO process, only the LBA address information corresponding to part of the volume needs to be determined through the IO request.

Receive the request address information (LBA address information) of the current IO request and the request data length of the current IO request to determine the data area where the corresponding IO request is located. The initial address information can be known according to the request address information, and the termination address information is determined through the request data length and the initial address information to determine the data area occupied by the current IO request.

According to the relationship between the requested data area and multiple data areas, the current IO request is forwarded to the corresponding mirror pair node. It can be understood that there is only one preferred node corresponding to the mirror pair node, and the data area is used instead of the volume, and the preferred node accesses the data area mechanism to improve the load balance. If the data length of the current IO request is long, and the corresponding requested data area spans multiple data areas, in the mirror pair node, one node corresponds to one data area, which may be forwarded to multiple nodes at the same time. If the requested data area is a data area, it does not need to be forwarded to multiple nodes.

A node IO forwarding method of a multi-control cluster provided by an embodiment of the present invention includes: obtaining a mirror pair node of a multi-control cluster, and dividing the volume corresponding to the multi-control cluster into multiple data according to the RAID stripe width and the mirror pair node Area, wherein the data area is located in the mirror pair node; receive the request address information and request data length of the current IO request, and determine the corresponding request data area according to the request address information and request data length; according to the request data area and multiple data areas The current IO request of the relationship pair is forwarded to the mirror pair node corresponding to the data area. This method breaks up the volume space according to the stripe width and the mirror pair nodes, and divides the volume space into data areas corresponding to the mirror pair nodes, so as to ensure the balance of the load in each mirror pair node, avoiding the existing volume-based granularity, and only using A node accesses the current volume, resulting in low load balancing. Determine the current request data area according to the request address and data length of the IO request, and determine the forwarding to the corresponding mirror pair node according to the relationship between the request data area and the data area, avoiding the inefficiency caused by existing multiple nodes accessing a single volume According to the problem, the data area is forwarded to the corresponding mirror pair node, and the stripe lock-free optimization mechanism is implemented with the data area as the granularity to improve the availability of the multi-control storage system.

On the basis of the foregoing embodiments, according to the number of nodes of the mirror pair node, a plurality of data blocks are processed to obtain the data area corresponding to the mirror pair node, including:

Number the mirror pair nodes and multiple data blocks separately;

Use the number of nodes as the divisor, and perform remainder processing on multiple data blocks to obtain the corresponding remainder;

According to the data block to which the remainder belongs, it is divided into the mirror pair node corresponding to the mirror pair node with the same number.

Specifically, the nodes of the mirroring pair nodes are numbered. Taking a dual-copy four-controller cluster as an example, there are four nodes whose numbers are 0-3. Perform numbering processing on multiple data blocks, use the number of nodes as a divisor, perform remainder processing on multiple data blocks to obtain the corresponding remainder, and divide the data blocks described by the remainder into mirror pair nodes with the same number corresponding to the mirror pair nodes. For example, if the data block numbered 1 is divided by 4 and the remainder is 1, it corresponds to node 1 of the mirror pair node; for the data block numbered 4 divided by 4, the remainder obtained is 0, which corresponds to the mirror pair node node 0. The regions are divided sequentially until the data blocks are divided.

It can be understood that in a node, the corresponding data blocks can form a set, and at the same time, in the node, the set exists in the form of double copies, and a set can include multiple data blocks.

Fig. 3 is a schematic diagram of a partitioned data area provided by an embodiment of the present invention. As shown in Fig. 3, the segments of the multi-control cluster storage system correspond to data blocks, and the data blocks are numbered as index values, and the partitions with an index value of 0 It is in region0 (data region). In node 0 and node 1, region0 exists in the form of a double copy. If the preferred node of its mirror pair node is node 0 to access region0, when the IO request is region3, its corresponding mirror pair node nodes 0 and 3, because Node 0 is used to access region0, and node 3 is used as the preferred node at this time.

According to the number of nodes of the mirror pair node provided by the embodiment of the present invention, multiple data blocks are processed to obtain the data area corresponding to the mirror pair node, a new IO forwarding mechanism is introduced, and the IO forwarding is no longer performed at the granularity of the volume, but It is broken up into data blocks according to the width of the stripe, and the data blocks correspond to the data area, and the data area is used as the granularity to forward in the multi-control cluster to ensure load balance.

On the basis of the above embodiments, before receiving the request address information and request data length of the current IO request, it also includes:

Obtain the online path logic value of the volume corresponding to the multi-controller cluster and the mirror pair node logic value;

performing logical AND processing on the online path logical value and the mirror image pair node logical value to obtain the first logical value;

Taking the node corresponding to the first logical value as a set of forwarding target nodes of multiple data areas;

The second logical value is obtained by inverting the first logical value, and the node corresponding to the second logical value is used as a set of forwarding source nodes of the multiple data areas.

It can be understood that the logical value corresponding to the online path of the volume fed back by the lower layer and the read-write preferred node of each mirror pair is obtained, and the two logical values are logically ANDed to obtain the first logical value, which is used as each A collection of forwarding target nodes for a region (data region). Inverting the first logical value is the set of forwarding source nodes for each region (data region).

The forwarding source node and the forwarding target node of the data area provided in this embodiment are determined, so that a mapping relationship is established between the nodes, which facilitates subsequent forwarding to the corresponding node according to the IO request.

On the basis of the above-mentioned embodiments, the corresponding request data area is determined according to the request address information and the request data length, including:

Obtain the number of bytes occupied by the address information corresponding to the RAID stripe width;

Obtain the number of bytes occupied by the request address information;

Perform remainder processing on the number of bytes occupied by the requested address information and the number of bytes occupied by the address information corresponding to the RAID stripe width to obtain the corresponding initial data block;

Determine the termination data block according to the request data length and request address information;

The corresponding requested data area is determined according to the relationship between the initial data block and the terminated data block.

Specifically, when an IO is delivered to a certain node, the requested data area is determined according to the address information of the IO to obtain corresponding forwarding node information. First obtain the number of LBA addresses in the address information of the RAID stripe width, and then obtain the number of bytes of the LBA in the requested address information, divide the requested address information by the address information of the LBA corresponding to the stripe width, and obtain the remainder as the initial data piece. The termination data block can be known according to the data length. In combination with Figure 3, the initial data block and the termination data block are the index values of the segment, and the multiple data blocks in the middle corresponding to the relationship between the data block and the termination data block are used as the request for the current IO request. data area.

The region where the IO is located is determined according to the LBA address information of the IO provided in this embodiment, so as to facilitate subsequent forwarding to the corresponding mirror pair node.

In combination with the above embodiments, forward the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and multiple data areas, including:

When the initial data block and the termination data block are the same data block, determine that the requested data area is a data area;

Determine the mirror pair node according to the location of the requested data area in multiple data areas;

When the initial data block and the termination data block are not the same data block, it is determined that the requested data area spans multiple data areas;

The corresponding mirror pair nodes are determined according to the positions of the spanning multiple data areas.

It can be understood that, in order to improve the IO efficiency when the current node accesses the data area, a node is accessed according to the same stripe bandwidth. A segment is a stripe width. If the initial data block and the termination data block span multiple data blocks, and it is determined that the requested data area spans multiple data areas, it needs to be split into several sub-IOs according to the segment boundary and forwarded to the mirror pair node respectively. If it is a data area, forward the nodes directly according to the image to which the data area belongs.

According to the relationship between the requested data area and multiple data areas provided in this embodiment, the current IO request is forwarded to the mirror pair node corresponding to the data area, and a node is accessed according to the same strip bandwidth, so as to improve the IO when the current node accesses the data area efficiency.

As mentioned in the above-mentioned embodiment, according to the LBA address information of the IO request, the request data area where it is located is determined to obtain the corresponding forwarding node information. As an embodiment, the mirror pair node is determined, including:

Determine the forwarding node information corresponding to the requested data area;

When the forwarding node information is in the forwarding source node set, the corresponding forwarding target node is obtained according to the forwarding source node set;

Forward the current IO request to the forwarding target node to determine the mirror pair node.

Specifically, determine the forwarding node information corresponding to the requested data area, if the current node is in the forwarding source node set, then obtain the target node from the forwarding target node set and forward it, otherwise send it to the lower module of the IO stack to continue processing.

The mirror pair node provided in this embodiment is determined to determine the forwarding target node, forwarded to the corresponding mirror pair node according to the data area, and the stripe lock-free optimization mechanism is implemented with the data area as the granularity, and the availability of the multi-control storage system is improved.

The above describes in detail the various embodiments corresponding to the node IO forwarding method of the multi-control cluster. On this basis, the present invention also discloses the node IO forwarding device of the multi-control cluster corresponding to the above method. FIG. 4 is provided by the embodiment of the present invention A structural diagram of a node IO forwarding device of a multi-control cluster. As shown in Figure 4, the node IO forwarding device of the multi-control cluster includes:

The dividing module 11 is used to obtain the mirror image pair nodes of the multi-control cluster, and divides the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror image pair nodes, wherein the data area is located in the mirror image pair nodes;

Determining module 12, for receiving the request address information and request data length of current IO request, and determine corresponding request data area according to request address information and request data length;

The forwarding module 13 is configured to forward the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and multiple data areas.

Since the embodiment of the device part corresponds to the above-mentioned embodiments, please refer to the description of the embodiments of the above-mentioned method part for the embodiment of the device part, and details are not repeated here.

For the introduction of a multi-control cluster node IO forwarding device provided by the present invention, please refer to the above method embodiment, and the present invention will not repeat it here, and it has the same beneficial effect as the above-mentioned multi-control cluster node IO forwarding method.

FIG. 5 is a structural diagram of another multi-control cluster node IO forwarding device provided by an embodiment of the present invention. As shown in FIG. 5, the device includes:

Memory 21, used to store computer programs;

The processor 22 is configured to implement the steps of the node IO forwarding method of the multi-control cluster when executing the computer program.

The node IO forwarding device of the multi-control cluster provided in this embodiment may include but not limited to a smart phone, a tablet computer, a notebook computer or a desktop computer, and the like.

Wherein, the processor 22 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. Processor 22 can adopt at least one hardware form in Digital Signal Processor (Digital Signal Processor, DSP), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA), Programmable Logic Array (Programmable LogicArray, PLA) accomplish. Processor 22 may also include a main processor and a coprocessor, the main processor is a processor for processing data in a wake-up state, and is also called a central processing unit (Central Processing Unit, CPU); Low-power processor for processing data in standby state. In some embodiments, the processor 22 may be integrated with a graphics processor (Graphics Processing Unit, GPU), and the GPU is used for rendering and drawing the content that needs to be displayed on the display screen. In some embodiments, the processor 22 may also include an artificial intelligence (Artificial Intelligence, AI) processor, which is used to process computing operations related to machine learning.

Memory 21 may include one or more computer-readable storage media, which may be non-transitory. The memory 21 may also include high-speed random access memory and non-volatile memory, such as one or more magnetic disk storage devices and flash memory storage devices. In this embodiment, the memory 21 is at least used to store the following computer program 211, wherein, after the computer program is loaded and executed by the processor 22, it can realize the relevant steps of the node IO forwarding method of the multi-control cluster disclosed in any of the foregoing embodiments . In addition, the resources stored in the memory 21 may also include an operating system 212 and data 213, etc., and the storage method may be temporary storage or permanent storage. Wherein, the operating system 212 may include Windows, Unix, Linux and so on. The data 213 may include but not limited to the data involved in the node IO forwarding method of the multi-control cluster and the like.

In some embodiments, the node IO forwarding device of the multi-control cluster may further include a display screen 23 , an input/output interface 24 , a communication interface 25 , a power supply 26 and a communication bus 27 .

Those skilled in the art can understand that the structure shown in FIG. 5 does not constitute a limitation on the node IO forwarding device of the multi-control cluster, and may include more or less components than those shown in the figure.

The processor 22 implements the node IO forwarding method of the multi-control cluster provided by any one of the above-mentioned embodiments by invoking instructions stored in the memory 21 .

For the introduction of a multi-control cluster node IO forwarding device provided by the present invention, please refer to the above method embodiment, and the present invention will not repeat it here, and it has the same beneficial effect as the above-mentioned multi-control cluster node IO forwarding method.

Further, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by the processor 22, the steps of the above-mentioned node IO forwarding method of the multi-control cluster are implemented.

It can be understood that if the methods in the above embodiments are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , executing all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

For the introduction of a computer-readable storage medium provided by the present invention, please refer to the above method embodiment, and the present invention will not be repeated here, and it has the same beneficial effect as the above-mentioned multi-control cluster node IO forwarding method.

As an embodiment, FIG. 6 is a flowchart of another node IO forwarding method of a multi-control cluster provided by an embodiment of the present invention, as shown in FIG. 6 , including:

S21: Divide the volume into a number of data blocks according to the stripe width, and add them to the region0-3 sets respectively in four cycles, corresponding to the mirror pairs one by one;

S22: Obtain the online path of the volume fed back by the lower layer and the optimal node of each mirror pair respectively, and calculate the forwarding source node and target node;

S23: Receive IO, and calculate the actual region according to the address information and data length;

S24: Determine whether the actual region of the IO is cross-region, if yes, go to step S25, if not, go to step S26;

S25: Split sub-IOs, forward them to corresponding nodes, and respond to the upper layer after all sub-IOs are completed;

S26: forward to the corresponding node of the region according to the address information and data length.

For the introduction of another multi-control cluster node IO forwarding method provided by the present invention, please refer to the above-mentioned method embodiment, and the present invention will not repeat it here, and it has the same beneficial effect as the above-mentioned multi-control cluster node IO forwarding method.

A node IO forwarding method of a multi-control cluster, a node IO forwarding device and a medium of a multi-control cluster provided by the present invention have been introduced in detail above. Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for relevant details, please refer to the description of the method part. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

It should also be noted that in this specification, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Moreover, the terms "comprising", "comprising", or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also items not expressly listed. other elements, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (10)

1. A node IO forwarding method of a multi-control cluster, characterized in that, comprising: Obtain the mirror pair node of the multi-control cluster, and divide the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror pair node, wherein the data area is located at the mirror pair node Inside; Receive the request address information and the request data length of the current IO request, and determine the corresponding request data area according to the request address information and the request data length; Forwarding the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and the plurality of data areas. 2. The node IO forwarding method of a multi-control cluster according to claim 1, wherein the volume corresponding to the multi-control cluster is divided into a plurality of data areas according to the RAID stripe width and the mirror pair node ,include: Obtain the width data of the RAID stripe width; dividing the volume corresponding to the multi-control cluster into multiple data blocks according to the width data; Processing the multiple data blocks according to the node number of the mirror pair node to obtain the data area corresponding to the mirror pair node. 3. The node IO forwarding method of multi-control cluster according to claim 2, characterized in that, according to the node number of the mirror image pair node, a plurality of the data blocks are processed to obtain corresponding to the mirror image pair node The data area, including: Perform numbering processing on the mirror pair node and the plurality of data blocks respectively; Using the number of nodes as a divisor, performing remainder processing on a plurality of the data blocks to obtain a corresponding remainder; Divide the data block to which the remainder belongs to the mirror pair node corresponding to the mirror pair node with the same number. 4. The node IO forwarding method of a multi-control cluster according to any one of claims 1 to 3, wherein, before receiving the request address information and the request data length of the current IO request, it also includes: Obtain the online path logic value of the volume corresponding to the multi-control cluster and the mirror pair node logic value; performing logical AND processing on the online path logical value and the mirror image pair node logical value to obtain a first logical value; taking the node corresponding to the first logic value as a set of forwarding target nodes of the multiple data areas; Inverting the first logical value to obtain a second logical value, and using the nodes corresponding to the second logical value as a set of forwarding source nodes of the multiple data areas. 5. The node IO forwarding method of a multi-control cluster according to claim 4, wherein the determining the corresponding request data area according to the request address information and the request data length includes: Obtain the number of bytes occupied by the address information corresponding to the RAID stripe width; Obtain the number of bytes occupied by the request address information; performing remainder processing on the number of bytes occupied by the requested address information and the number of bytes occupied by the address information corresponding to the RAID stripe width to obtain a corresponding initial data block; determining a termination data block according to the request data length and the request address information; Determine the corresponding requested data area according to the relationship between the initial data block and the terminated data block. 6. The node IO forwarding method of a multi-control cluster according to claim 5, wherein, according to the relationship between the requested data area and a plurality of the data areas, the current IO request is forwarded to the The mirror pair nodes corresponding to the data area include: When the initial data block and the termination data block are the same data block, determine that the requested data area is a data area; determining the mirror pair node according to the positions of the requested data area in the plurality of data areas; When the initial data block and the terminating data block are not the same data block, determine that the requested data area spans multiple data areas; The corresponding mirror pair node is determined according to the positions of the spanning multiple data areas. 7. The node IO forwarding method of the multi-control cluster according to claim 6, wherein determining the mirror pair node includes: determining forwarding node information corresponding to the requested data area; When the forwarding node information is in the forwarding source node set, obtain a corresponding forwarding target node according to the forwarding source node set; Forwarding the current IO request to the forwarding target node to determine the mirror pair node. 8. A node IO forwarding device of a multi-control cluster, characterized in that, comprising: A division module, configured to obtain the mirror pair nodes of the multi-control cluster, and divide the volume corresponding to the multi-control cluster into multiple data areas according to the RAID stripe width and the mirror pair nodes, wherein the data areas are located at In the mirror pair node; A determining module, configured to receive request address information and request data length of the current IO request, and determine a corresponding request data area according to the request address information and the request data length; A forwarding module, configured to forward the current IO request to the mirror pair node corresponding to the data area according to the relationship between the requested data area and a plurality of the data areas. 9. A node IO forwarding device of a multi-control cluster, characterized in that, comprising: memory for storing computer programs; The processor is configured to implement the steps of the node IO forwarding method of a multi-control cluster according to any one of claims 1 to 7 when executing the computer program. 10. A computer-readable storage medium, characterized in that, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the multiple functions according to any one of claims 1 to 7 are realized. The steps of the node IO forwarding method of the control cluster.

Images