CN110909076B - Storage cluster data synchronization method, device, equipment and storage medium - Google Patents
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- CN110909076B CN110909076B CN201911053690.6A CN201911053690A CN110909076B CN 110909076 B CN110909076 B CN 110909076B CN 201911053690 A CN201911053690 A CN 201911053690A CN 110909076 B CN110909076 B CN 110909076B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a storage cluster data synchronization method, which comprises the following steps: the execution node acquires a data operation instruction sent by the service node; the data operation instruction is sent to the service node by the client; analyzing the data operation instruction, and determining a target node designated by the data operation instruction; transmitting the data operation instruction to the target node; the method distributes the acquired data operation instruction to the target node by using the execution node. The executing node is used for receiving the data operation instruction sent by the service node and distributing the data operation instruction to other nodes, and service is not required to be provided outwards, so that the problem of breakdown caused by too much service can be avoided, and the data synchronization reliability of the distributed storage cluster is improved; in addition, the invention also provides a storage cluster data synchronization device, equipment and a computer readable storage medium, which also have the beneficial effects.
Description
Technical Field
The present invention relates to the field of storage clusters, and in particular, to a storage cluster data synchronization method, a storage cluster data synchronization device, a storage cluster data synchronization apparatus, and a computer readable storage medium.
Background
Currently, the size of a distributed storage cluster is larger and larger, in order to ensure data synchronization in the distributed storage cluster, the existing data synchronization method utilizes a master node to acquire a data operation instruction, distributes the data operation instruction to a designated slave node, and continuously resends the data operation instruction when the slave node does not receive the data operation instruction until the slave node receives the data operation instruction successfully. With the expansion of the distributed storage cluster, the master node needs to send data operation instructions to more and more slave nodes, and meanwhile, more and more slave nodes cannot receive the data operation instructions in time due to faults and the like. When the retransmitted data operation instruction and the data operation instruction sent by the client are more, the main node does not have enough computing resources to process various services, so that the main node process is crashed, the data operation service can not be provided outwards, meanwhile, the data is lost, the data in the cluster is not synchronized, and the reliability of the data synchronization of the cluster is reduced. Therefore, the existing data synchronization method has the problem of poor data synchronization reliability.
Therefore, how to solve the problem of poor data synchronization reliability in the existing data synchronization method is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
Accordingly, the present invention is directed to a storage cluster data synchronization method, a storage cluster data synchronization device, a storage cluster data synchronization apparatus, and a computer readable storage medium, which solve the problem of poor data synchronization reliability in the existing data synchronization method.
In order to solve the technical problems, the present invention provides a storage cluster data synchronization method, which includes:
the execution node acquires a data operation instruction sent by the service node; the data operation instruction is sent to the service node by a client;
analyzing the data operation instruction, and determining a target node appointed by the data operation instruction;
and sending the data operation instruction to the target node.
Optionally, after the sending the data operation instruction to the target node, the method further includes:
judging whether acknowledgement information sent by the target node is received or not;
if not, the data operation instruction is sent to the target node again.
Optionally, after the executing node obtains the data operation instruction sent by the service node, the method further includes:
and storing the data operation instruction into a database.
Optionally, after the obtaining the data operation instruction sent by the service node, the method further includes:
and receiving operation completion information sent by the target node and sending the operation completion information to the service node.
Optionally, the method further comprises:
stopping receiving the data operation instruction sent by the service node when the node expansion instruction is received;
performing full data synchronization operation on the newly added node appointed by the node expansion instruction;
and restarting receiving the data operation instruction sent by the service node after the full data synchronization operation is completed.
The invention also provides a storage cluster data synchronization device, which comprises:
the acquisition module is used for acquiring a data operation instruction sent by the service node by the execution node; the data operation instruction is sent to the service node by a client;
the determining module is used for analyzing the data operation instruction and determining a target node designated by the data operation instruction;
and the sending module is used for sending the data operation instruction to the target node.
Optionally, the method further comprises:
the judging module is used for judging whether the confirmation information sent by the target node is received or not;
and the retransmission module is used for retransmitting the data operation instruction to the target node if the acknowledgement information transmitted by the target node is not received.
Optionally, the method further comprises:
and the storage module is used for storing the data operation instruction into a database.
The invention also provides storage cluster data synchronization equipment, which comprises a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor is configured to execute the computer program to implement the storage cluster data synchronization method described above.
The invention also provides a computer readable storage medium for storing a computer program, wherein the computer program realizes the storage cluster data synchronization method when being executed by a processor.
The storage cluster data synchronization method provided by the invention acquires the data operation instruction sent by the service node; the data operation instruction is sent to the service node by the client. And analyzing the data operation instruction to determine the target node designated by the data operation instruction. And sending the data operation instruction to the target node.
The method comprises the steps that a service node is utilized to acquire a data operation instruction sent by a client and send the data operation instruction to an execution node, and the execution node distributes the acquired data operation instruction to a target node. The service node is used for acquiring and transmitting the data operation instruction, the execution node is used for receiving the data operation instruction transmitted by the service node and distributing the data operation instruction to other nodes, and the service node only needs to communicate with one node of the execution node, so that the data operation instruction transmitted by the client can be acquired by using more resources; the execution node is only used to distribute data operation instructions and therefore more computing resource distribution instructions may be utilized. The service node and the execution node are not easy to generate process breakdown faults, the data synchronization reliability of the distributed storage cluster is improved, and the problem of poor data synchronization reliability in the data synchronization method in the prior art is solved.
In addition, the invention also provides a storage cluster data synchronization device, storage cluster data synchronization equipment and a computer readable storage medium, and the storage cluster data synchronization device and the computer readable storage medium have the same beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a method for synchronizing data of a storage cluster according to an embodiment of the present invention;
FIG. 2 is a flowchart of a specific node expansion method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a storage cluster data synchronization device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a storage cluster data synchronization device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart of a storage cluster data synchronization method according to an embodiment of the present invention. The method comprises the following steps:
s101: the execution node acquires a data operation instruction sent by the service node; the data operation instruction is sent to the service node by the client.
In order to solve the problem of poor data synchronization reliability in the prior art data synchronization method, an execution node and a service node are set in a distributed storage cluster. In the embodiment of the invention, each operation of the service node is finished by using the db-master process, each operation of the execution node is finished by using the second-db-master process, namely, the node running the db-master process is determined as the service node, and the node running the second-db-master process is determined as the execution node. Because the distributed storage cluster generally uses the master node to complete each interaction with the clients outside the cluster, the slave node is used for executing the received data operation instruction, and the service node only needs to perform data communication with the clients and the execution nodes, and less sub-acid resources are needed, the db-master process can be preferably executed on the master node, namely the master node is set as the service node, and optionally, a slave node executes the second-db-master process, namely, an optional slave node determines the second-db-master process as the execution node. Of course, other determination schemes of the service node and the execution node are also possible, which is not limited by the embodiment of the present invention.
The data operation instructions comprise instructions for adding, deleting, modifying and the like to the data, and instructions for inquiring the data. After the service node acquires the data operation instruction sent by the client, the service node sends the data operation instruction to the execution node, and the execution node acquires the data operation instruction sent by the service node.
S102: and analyzing the data operation instruction to determine the target node designated by the data operation instruction.
After the execution node acquires the data operation instruction, the execution node analyzes the data operation instruction and determines a target node designated by the data operation instruction. Specifically, after the data operation instruction is analyzed, target data can be determined, and the node storing the target data is determined as a target node; or when a specific node address is included in the data operation instruction, determining the node with the node address as the target node.
Further, in order to prevent the content of the data operation instruction from being wrong, whether the data specified by the data operation instruction exists in the cluster or not may be judged first, if not, instruction error information is sent to the service node, and the service node sends the instruction error instruction to the client. Or the target node specified by the data operation instruction can be judged whether the data specified by the data operation instruction exists or not, if the target node does not exist, the instruction error information is sent to the service node, and the service node sends the instruction error information to the client.
S103: and sending the data operation instruction to the target node.
After the target node is determined, the execution node sends the data operation instruction to the target node so that the target node operates on the specified data according to the data operation instruction. Specifically, when the data operation instruction is a data addition instruction or a data rewriting instruction, the data to be added or rewritten is transmitted along with the data operation instruction, and when the target node receives the data operation instruction and the data transmitted along with the data operation instruction, the target node adds or rewrites the designated data in a database corresponding to the target node; when the data operation instruction is a data deletion instruction, the target node deletes the designated data in the corresponding database after receiving the data operation instruction.
By applying the storage cluster data synchronization method provided by the embodiment of the invention, the service node is utilized to acquire the data operation instruction sent by the client and send the data operation instruction to the execution node, and the execution node distributes the acquired data operation instruction to the target node. The service node is used for acquiring and transmitting the data operation instruction, the execution node is used for receiving the data operation instruction transmitted by the service node and distributing the data operation instruction to other nodes, and the service node only needs to communicate with one node of the execution node, so that the data operation instruction transmitted by the client can be acquired by using more resources; the execution node is only used to distribute data operation instructions and therefore more computing resource distribution instructions may be utilized. The method has the advantages that the work of the main node in the data synchronization method in the prior art is divided into the service node and the execution node for execution, and the service pressure is shared for the two nodes, so that the process breakdown fault of the service node and the execution node is not easy to occur, the process breakdown fault of the service node and the execution node can be avoided, the data loss is further avoided, the data synchronization reliability of the distributed storage cluster is improved, and the problem of poor data synchronization reliability in the data synchronization method in the prior art is solved.
Based on the above embodiment of the present invention, in order to ensure that the target node receives the data operation instruction, after sending the data operation instruction to the target node, the embodiment of the present invention may further include:
step 11: and judging whether acknowledgement information sent by the target node is received or not.
The acknowledgement information is used to indicate that the target node has received the data operation instruction, and the specific form of the acknowledgement information is not limited in this embodiment. Specifically, it may be determined whether the acknowledgement information sent by the target node is received after the data operation instruction is sent to the target node for a period of time, for example, whether the acknowledgement information sent by the target node is received after the data operation instruction is sent to the target node for 1 second. When no acknowledgement message is received from the destination node, step 12 is entered.
Step 12: and re-sending the data operation instruction to the target node.
When the acknowledgement information sent by the target node is not received, the data operation instruction is considered to be lost in the sending process, and then the data operation instruction is sent to the target node again. Further, after the retransmission, the operation of judging whether the acknowledgement information sent by the target node is received may be performed again, and the retransmission may be performed again when the acknowledgement information is not received, until the acknowledgement information sent by the target node is received.
In order to perform the retransmission operation, it is necessary to store the data operation instruction in the corresponding database after the data operation instruction is acquired, so as to perform the retransmission operation. Furthermore, when the execution node fails, the execution node can be reelected from other slave nodes, and the database storing the data operation instructions is managed, so that the situations of data operation instruction loss and data asynchronization in the cluster can be avoided.
By applying the storage cluster data synchronization method provided by the embodiment of the invention, after the data operation instruction is sent to the target node, whether the target node receives the data operation instruction can be judged by judging whether the confirmation information sent by the target node is received or not, and the data operation instruction is retransmitted when the confirmation information is not received, so that the target node is ensured to receive the data operation instruction.
Based on the above embodiment of the present invention, in order to enable the client to know the execution condition of the data operation instruction, the present embodiment may further include, after sending the data operation instruction to the target node:
and receiving the operation completion information sent by the target node and sending the operation completion information to the service node. Specifically, after the target node completes the data operation instruction, operation completion information for the data operation instruction is sent to the execution node to indicate that the data operation instruction is completed. The execution node may send the operation completion information to the service node after receiving the operation completion information, so that the service node sends the operation completion information to the client to notify the client that the data operation instruction is completed.
In practical application, when node expansion is performed, that is, when a new slave node is added in a cluster, a master node needs to suspend providing services to the outside, and simultaneously suspend the operation of issuing a data operation instruction so as to complete full data synchronization. This makes it impossible to provide services to the outside, and affects the execution of various services. To solve this problem, an embodiment of the present invention will describe a specific node expansion method, referring specifically to fig. 2, fig. 2 is a flowchart of a specific node expansion method provided in the embodiment of the present invention, including:
s201: and stopping receiving the data operation instruction sent by the service node when the node expansion instruction is received.
The node expansion instruction is an instruction for node expansion of the cluster, and when the node expansion instruction is received, the execution node is required to stop receiving the data operation instruction sent by the service node in order to carry out full-scale data synchronization operation on the newly added node.
S202: and carrying out full-data synchronization operation on the newly added node appointed by the node expansion instruction.
Specifically, after stopping receiving the data operation instruction sent by the service node, the executing node generates a full data snapshot of itself, and sends the full data snapshot to each newly added node so as to synchronize data with the newly added node. In this process, the service node may still receive the data operation instruction sent by the client, that is, provide services to the outside.
S203: and restarting receiving the data operation instruction sent by the service node after the full data synchronization operation is completed.
By applying the node expansion method provided by the embodiment of the invention, the service can be continuously provided for the outside when the cluster node is expanded, and the client can still send the data operation instruction to the service node without influencing the service.
The following describes a storage cluster data synchronization device provided by an embodiment of the present invention, and the storage cluster data synchronization device described below and the storage cluster data synchronization method described above may be referred to correspondingly.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a storage cluster data synchronization device according to an embodiment of the present invention, including:
an obtaining module 310, configured to obtain a data operation instruction sent by a service node; the data operation instruction is sent to the service node by the client;
a determining module 320, configured to parse the data operation instruction, and determine a target node specified by the data operation instruction;
and the sending module 330 is configured to send the data operation instruction to the target node.
Optionally, the method further comprises:
the judging module is used for judging whether acknowledgement information sent by the target node is received or not;
and the retransmission module is used for retransmitting the data operation instruction to the target node if the confirmation information transmitted by the target node is not received.
Optionally, the method further comprises:
and the storage module is used for storing the data operation instruction into the database.
Optionally, the method further comprises:
and the operation completion information sending module is used for receiving the operation completion information sent by the target node and sending the operation completion information to the service node.
Optionally, the method further comprises:
the stopping module is used for stopping receiving the data operation instruction sent by the service node when the node expansion instruction is received;
the synchronization module is used for carrying out full-data synchronization operation on the newly added node appointed by the node expansion instruction;
and the restarting module is used for restarting to receive the data operation instruction sent by the service node after the full data synchronization operation is completed.
The following describes a storage cluster data synchronization device provided by an embodiment of the present invention, where the storage cluster data synchronization device described below and the storage cluster data synchronization method described above may be referred to correspondingly.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a storage cluster data synchronization device according to an embodiment of the present invention, where the storage cluster data synchronization device includes a memory and a processor, and the method includes:
a memory 410 for storing a computer program;
The following describes a computer readable storage medium provided in an embodiment of the present invention, where the computer readable storage medium described below and the storage cluster data synchronization method described above may be referred to correspondingly.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps of the storage cluster data synchronization method when being executed by a processor.
The computer readable storage medium may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Finally, it is further noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing has described in detail a storage cluster data synchronization method, a storage cluster data synchronization device, a storage cluster data synchronization apparatus and a computer readable storage medium, to which specific examples are applied to illustrate the principles and embodiments of the present invention, the above examples are only used to help understand the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (9)
1. A storage cluster data synchronization method, comprising:
the execution node acquires a data operation instruction sent by the service node; the data operation instruction is sent to the service node by a client; setting one executing node and one service node in the storage cluster;
analyzing the data operation instruction, and determining a target node appointed by the data operation instruction;
sending the data operation instruction to the target node;
further comprises: stopping receiving the data operation instruction sent by the service node when the node expansion instruction is received;
performing full data synchronization operation on the newly added node appointed by the node expansion instruction;
and restarting receiving the data operation instruction sent by the service node after the full data synchronization operation is completed.
2. The storage cluster data synchronization method of claim 1, further comprising, after said sending said data manipulation instruction to said target node:
judging whether acknowledgement information sent by the target node is received or not;
if not, the data operation instruction is sent to the target node again.
3. The storage cluster data synchronization method according to claim 1, further comprising, after the executing node obtains the data operation instruction sent by the serving node:
and storing the data operation instruction into a database.
4. The storage cluster data synchronization method of claim 1, further comprising, after said sending said data manipulation instruction to said target node:
and receiving operation completion information sent by the target node and sending the operation completion information to the service node.
5. A storage cluster data synchronization apparatus, comprising:
the acquisition module is used for acquiring a data operation instruction sent by the service node by the execution node; the data operation instruction is sent to the service node by a client; setting one executing node and one service node in the storage cluster;
the determining module is used for analyzing the data operation instruction and determining a target node designated by the data operation instruction;
the sending module is used for sending the data operation instruction to the target node;
the stopping module is used for stopping receiving the data operation instruction sent by the service node when receiving the node expansion instruction;
the synchronization module is used for carrying out full-data synchronization operation on the newly added node appointed by the node expansion instruction;
and the restarting module is used for restarting to receive the data operation instruction sent by the service node after the full data synchronization operation is completed.
6. The storage cluster data synchronization device of claim 5, further comprising:
the judging module is used for judging whether the confirmation information sent by the target node is received or not;
and the retransmission module is used for retransmitting the data operation instruction to the target node if the acknowledgement information transmitted by the target node is not received.
7. The storage cluster data synchronization device of claim 5, further comprising:
and the storage module is used for storing the data operation instruction into a database.
8. A storage cluster data synchronization device comprising a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor is configured to execute the computer program to implement the storage cluster data synchronization method according to any one of claims 1 to 4.
9. A computer readable storage medium for storing a computer program, wherein the computer program when executed by a processor implements the storage cluster data synchronization method of any one of claims 1 to 4.
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| CN111866170B (en) * | 2020-07-30 | 2023-08-08 | 小视科技(江苏)股份有限公司 | Method for transmitting synchronous message in IOT cluster |
| CN112307128A (en) * | 2020-11-26 | 2021-02-02 | 中国—东盟信息港股份有限公司 | Distributed heterogeneous data synchronization system and method |
| CN112202687B (en) | 2020-12-03 | 2021-05-25 | 苏州浪潮智能科技有限公司 | Node synchronization method, device, equipment and storage medium |
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