WO2023206142A1

WO2023206142A1 - Data synchronization method and apparatus, computer device and storage medium

Info

Publication number: WO2023206142A1
Application number: PCT/CN2022/089570
Authority: WO
Inventors: 张作鹏
Original assignee: 西门子股份公司; 西门子（中国）有限公司
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2023-11-02

Abstract

The present application provides a data synchronization method and apparatus, a computer device and a storage medium, which are applied to a blockchain node. The data synchronization method comprises: monitoring generation of a new block on a blockchain, wherein the blockchain is used for storing a write operation instruction for global data (101); after it is monitored that the new block is generated on the blockchain, acquiring the write operation instruction stored in the new block (102); and updating, according to the write operation instruction stored in the new block, the global data locally cached by the blockchain node (103). According to the present solution, data security is improved while data consistency is ensured.

Description

Data synchronization method, device, computer equipment and storage medium

Technical field

The present application relates to the field of data processing technology, and in particular, to a data synchronization method, device, computer equipment and storage medium.

Background technique

In some application scenarios, the distributed system needs to maintain data consistency. For example, the distributed system includes multiple communication modules. The user needs to determine the status of each communication module, and each communication module needs to determine the online status of other communication modules. That is, it is necessary to ensure the consistency of communication module status data between communication modules.

Currently, in order to achieve data consistency in distributed systems, the data of distributed systems are stored in centralized storage such as databases and file systems. All nodes included in the distributed system interact with centralized storage to ensure that each Nodes are able to read consistent data from centralized storage.

However, there is a single point problem in storing data in centralized storage. Failure of the centralized storage will cause each node to be unable to read the data, and the entire distributed system will not be able to operate normally. Moreover, the data stored in the centralized storage is easily tampered with, resulting in Data is less secure.

Contents of the invention

In view of this, the data synchronization method, device, computer equipment and storage medium provided by this application can improve data security while ensuring data consistency.

According to the first aspect of the embodiment of the present application, a data synchronization method is provided, which is applied to a blockchain node. The data synchronization method includes: monitoring the generation of new blocks on the blockchain, wherein the blockchain uses To store write operation instructions for global data; after monitoring that a new block is generated on the blockchain, obtain the write operation instructions stored in the new block; according to the write operation instructions stored in the new block, perform The global data cached locally by the blockchain node is updated. Since each node locally caches the latest global data, if any node fails, other nodes can still operate normally, thus ensuring the reliability of the distributed system operation. Since the write operation instructions for global data are stored on the blockchain, the security of global data can be improved based on the non-tamperable and traceable characteristics of data on the blockchain.

In a possible implementation, after the blockchain node starts or resumes its running state, the global data is constructed based on each write operation instruction for the global data, and the constructed global data is cached locally in the blockchain node. In storage, when users of the blockchain node need to access global data, they can directly access the global data cached locally on the blockchain node, which reduces the delay in accessing global data and improves the user experience.

In a possible implementation, constructing global data based on each write operation instruction for global data includes: reading the write operation instructions for global data from each block of the blockchain; Each write operation instruction constructs global data. Based on the non-tamperable and traceable characteristics of data on the blockchain, the write operation instructions are read from the blockchain to construct global data, which ensures the accuracy of the constructed global data and ensures global data between blockchain nodes. consistency.

In a possible implementation, the method further includes: persisting the write operation instructions stored in the new block to the local storage of the blockchain node; the writing operation instructions based on the global data Constructing global data includes: determining new blocks on the blockchain during the period when the blockchain node stops running; persisting the write operation instructions stored in each of the new blocks to the block Local storage of the chain node; construct global data according to each write operation instruction persisted in the local storage of the blockchain node. After detecting that a new block is generated on the blockchain, the write operation instructions stored in the new block are persisted to the local storage of the blockchain node. After each blockchain node is started or restored to operating status, it can be based on the local The persistent write operation instructions in the storage are used to construct global data, without the need to read each block of the blockchain to obtain each write operation instruction, which shortens the time required to construct global data and improves the efficiency of constructing global data.

In one possible implementation, determining the newly added blocks on the blockchain during the period when the blockchain node stops running includes: determining the latest persistent write operation on the blockchain node. The first block corresponding to the instruction; determine the second block on the blockchain with a block sequence number greater than the first block as a new block on the blockchain during the period when the blockchain node stops running. . Since the block sequence numbers of blocks on the blockchain increase sequentially according to the generation time, after determining the first block that stores the latest persistent write operation instructions on the blockchain node, the block sequence number of the first block can be and the block sequence number of each block on the blockchain to determine the new blocks generated when the blockchain node stops running, ensuring that the write operation instructions stored in each new block can be persisted to the local storage of the blockchain node , and then when constructing global data based on persistent write operation instructions on the blockchain node, the accuracy of the constructed global data is guaranteed.

In one possible implementation, determining the newly added blocks on the blockchain during the period when the blockchain node stops running includes: determining the latest persistent write operation on the blockchain node. Instruct the third block corresponding to the instruction; according to the timestamp stored in the block on the blockchain, determine the fourth block whose generation time indicated by the corresponding timestamp is later than that of the third block; transfer the fourth block The block is determined to be a newly added block on the blockchain during the period when the blockchain node stops running. Since blocks on the blockchain are generated sequentially in chronological order, and new write operation instructions are stored in new blocks, after determining the third block that stores the latest persistent write operation instructions on the blockchain node, According to the timestamp stored in the third block and the timestamp stored in each block on the blockchain, the fourth block whose generation time is later than the third block can be determined, and then each fourth block can be determined as a block. The new blocks generated when the blockchain node stops running ensure that the write operation instructions stored in each new block can be persisted to the local storage of the blockchain node, thus ensuring the accuracy of the global data.

In a possible implementation, the method further includes: receiving at least one write operation instruction for global data; creating a new block on the blockchain, and storing the received at least one write operation instruction. into the new block created. A new block will be generated to store the current blockchain node’s write operation instructions for global data, so that each blockchain node can store the write operation instructions for global data on the blockchain, and can store the global data according to the instructions on the blockchain. The write operation instructions update the global data. The synchronization mechanism based on the blockchain can ensure the consistency of the global data among the blockchain nodes and also ensure the timeliness of synchronizing the global data.

In a possible implementation, the write operation instructions for global data include at least one of a data addition instruction, a data deletion instruction, and a data modification instruction. Write operation instructions that change global data by adding, deleting, modifying, etc. will be stored on the blockchain, so that various changes to global data by each blockchain node can be synchronized to other blockchain nodes. , ensuring the reliability and effectiveness of global data synchronization between blockchain nodes.

According to the second aspect of the embodiment of the present application, a data synchronization device is provided, which is applied to a blockchain node. The data synchronization device includes: a monitoring module for monitoring the generation of new blocks on the blockchain, wherein: The blockchain is used to store write operation instructions for global data; the acquisition module is used to obtain the write operation instructions stored in the new block after the monitoring module detects that a new block is generated on the blockchain. ; Update module, used to update the global data cached locally by the blockchain node according to the write operation instructions stored in the new block.

According to a third aspect of the embodiment of the present application, a computer device is provided, including: a processor, a communication interface, a memory, and a communication bus. The processor, the memory, and the communication interface complete each other through the communication bus. communication between; the memory is used to store at least one executable instruction, the executable instruction causes the processor to perform operations corresponding to the data synchronization method provided in the first aspect.

According to a fourth aspect of the embodiment of the present application, a computer-readable storage medium is provided. Computer instructions are stored on the computer-readable storage medium. When executed by a processor, the computer instructions cause the processor to execute Operations corresponding to the data synchronization method provided in the above first aspect.

According to a fifth aspect of the embodiments of the present application, a computer program product is provided, which is tangibly stored on a computer-readable medium and includes computer-executable instructions, which when executed At least one processor is caused to execute the data synchronization method provided by the above-mentioned first aspect or any possible implementation of the first aspect.

According to the above technical solution, each node included in the distributed system serves as a blockchain node of the blockchain system. The blockchain is used to store write operations for global data. After each blockchain node performs a write operation on global data, The corresponding write operation instructions will be stored in the new block of the blockchain, and based on the synchronization mechanism of the blockchain, the new block will be synchronized to the blockchain on each blockchain node, so when monitoring the blockchain After a new block is generated, the global data cached locally by the blockchain node can be updated according to the write operation instructions stored in the new block, ensuring that the local cache of each blockchain node has the same global data, realizing distributed Data consistency between nodes in the system. Since each node locally caches the latest global data, other nodes can still operate normally if any node fails, thus ensuring the reliability of the distributed system operation. Since the write operation instructions for global data are stored on the blockchain, the security of global data can be improved based on the non-tamperable and traceable characteristics of data on the blockchain.

Description of the drawings

Figure 1 is a flow chart of a data synchronization method according to an embodiment of the present application;

Figure 2 is a flow chart of a data synchronization method according to another embodiment of the present application;

Figure 3 is a schematic diagram of a data synchronization device according to an embodiment of the present application;

Figure 4 is a schematic diagram of a data synchronization device according to another embodiment of the present application;

Figure 5 is a schematic diagram of a data synchronization device according to another embodiment of the present application;

Figure 6 is a schematic diagram of a computer device according to an embodiment of the present application.

List of reference signs:

100: Data synchronization method 200: Data synchronization method 300: Data synchronization device

600: Computer equipment 301: Monitoring module 302: Acquisition module

303: Update module 304: Build module 305: Create module

602: Processor 604: Communication interface 606: Memory

608: Communication bus 610: Program

101～103: Steps of Method 100 201～206: Steps of Method 200

Detailed ways

As mentioned before, in order to achieve data consistency in distributed systems, the current technical means is to store the data of distributed systems in centralized storage, such as databases, file systems, etc. Each node included in the distributed system Data interaction with centralized storage means that all nodes write data uniformly stored on the centralized storage and read data from the centralized storage, thus ensuring the consistency of data between nodes. However, there is a single point problem in storing the data of each node on the centralized storage. When the centralized storage fails, all nodes will be unable to read and write to the centralized storage, and the entire distributed system will not be able to operate normally. Moreover, data on centralized storage is easily tampered with, resulting in low data security.

In the embodiment of this application, by constructing a blockchain system, each node in the distributed system is a blockchain node. When each node performs a write operation on global data, the corresponding write operation instructions are stored in the block. On the chain, based on the synchronization mechanism of the blockchain, each write operation instruction will be synchronized to the blockchain of each node, and then each node can read the new write operation instruction from the blockchain, and based on The read write operation instructions update the global data to ensure the synchronization of global data between nodes. Since each node can obtain the latest global data based on the write operation instructions stored on the blockchain, if any node fails, other nodes can still operate normally, thus ensuring the reliability of the distributed system operation. Since the write operation instructions for global data are stored on the blockchain, the security of global data can be improved based on the non-tamperable and traceable characteristics of data on the blockchain.

The data synchronization method, device, computer equipment and storage medium provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Data synchronization method

Figure 1 is a flow chart of a data synchronization method provided by an embodiment of the present application. The data synchronization method is applied to blockchain nodes. The blockchain system includes multiple blockchain nodes. Each node in the distributed system They are all a blockchain node, and each blockchain node stores a complete blockchain. The synchronization mechanism between each blockchain node ensures the consistency of the data stored in the blockchain on each blockchain node. As shown in Figure 1, the data synchronization method 100 includes the following steps:

Step 101: Monitor the generation of new blocks on the blockchain, where the blockchain is used to store write operation instructions for global data.

When one of the blockchain nodes performs a write operation on global data, a new block will be generated on the blockchain to store the write operation instructions corresponding to the write operation. After a new block is generated in the blockchain on a blockchain node, based on the synchronization mechanism of the blockchain, the blockchain on each blockchain node will generate new blocks simultaneously to ensure that the same blocks are stored in the blockchain on each blockchain node. The data.

Write operation instructions are used to instruct the write operation of global data. Global data is jointly maintained by nodes in the distributed system, that is, global data is maintained synchronously by multiple blockchain nodes. Write operations include adding new global data, Delete and modify. For example, a write operation instruction can indicate that data a is added to the global data, data b in the global data is deleted, or data c in the global data is modified.

It should be noted that a new block can store one or more write operation instructions. When a new block stores multiple write operation instructions, the multiple write operation instructions can correspond to the write operation of global data by the same blockchain node, or they can also correspond to the write operation of global data by different blockchain nodes.

Step 102: After detecting that a new block is generated on the blockchain, obtain the write operation instructions stored in the new block.

After the blockchain node detects that a new block is generated on the blockchain, it reads the new block on the blockchain and obtains the write operation instructions stored in the new block.

It should be understood that the number of new blocks on the blockchain can be one or more. When the number of new blocks on the blockchain is multiple, each new block is read separately to obtain the information stored in each new block. write operation instructions.

Step 103: Update the global data cached locally in the blockchain node according to the write operation instructions stored in the new block.

The blockchain node has global data cached locally. After obtaining the write operation instructions stored in the new block, the global data is updated according to the obtained write operation instructions. Since the write operation instruction indicates the write operation of one or more blockchain nodes to global data, the write operation instruction in the new block indicates the latest write operation to global data. According to the write operation instruction stored in the new block, the local The cached global data performs corresponding write operations, ensuring that the local storage of each blockchain node has the same global data.

In the embodiment of this application, each node included in the distributed system serves as a blockchain node of the blockchain system. The blockchain is used to store write operations for global data. Each blockchain node performs write operations on global data. Afterwards, the corresponding write operation instructions will be stored in the new block of the blockchain, and based on the synchronization mechanism of the blockchain, the new block will be synchronized to the blockchain on each blockchain node, so when the area is monitored After a new block is generated on the blockchain, the global data cached locally by the blockchain node can be updated according to the write operation instructions stored in the new block to ensure that the local cache of each blockchain node has the same global data. This is achieved Data consistency among nodes in a distributed system. Since each node locally caches the latest global data, if any node fails, other nodes can still operate normally, thus ensuring the reliability of the distributed system operation. Since the write operation instructions for global data are stored on the blockchain, the security of global data can be improved based on the non-tamperable and traceable characteristics of data on the blockchain.

In one possible implementation, after the blockchain node starts or resumes its running state, the global data can be constructed based on each write operation instruction for the global data, and the constructed global data can be cached locally on the blockchain node. storage.

Since write operation instructions can indicate the addition, deletion or modification of global data, each write operation instruction for global data indicates each write operation for global data, so the latest global data can be constructed based on each write operation instruction for global data. data.

In the embodiment of this application, after the blockchain node is started or restored to the operating state, the global data is constructed according to each write operation instruction of the global data, and the constructed global data is cached and stored locally in the blockchain node. The blockchain node When users need to access global data, they can directly access the global data cached locally on the blockchain node, which reduces the delay in accessing global data and improves the user experience.

In one possible implementation, when constructing global data based on write operation instructions for global data, the write operation instructions for global data can be read from each block of the blockchain, and then based on each read write operation instruction Operation instructions build global data.

In the embodiment of this application, since all write operation instructions for global data are stored on the blockchain, and the latest global data can be constructed based on all write operation instructions for global data, it can be started or restored at the blockchain node. After the running state, the blockchain is read to obtain the write operation instructions stored in each block on the blockchain, and then the global data is constructed based on all the obtained write operation instructions. Based on the non-tamperable and traceable characteristics of data on the blockchain, the accuracy of the global data constructed is guaranteed, and the consistency of global data between blockchain nodes can be guaranteed.

In one possible implementation, after detecting that a new block is generated on the blockchain, the write operation instructions stored in the new block can be persisted to the local storage of the blockchain node. On this basis, when the block After the blockchain node starts or resumes operation, it is possible to determine the new blocks on the blockchain during the period when the blockchain node stops running. That is, it is possible to determine whether other blockchain nodes have access to global data while the current blockchain node stops running. A write operation was performed. If there is a new blockchain, the write operation instructions stored in the new block will be persisted to the local storage of the blockchain node, and then global data will be constructed based on each write operation instruction persisted in the local storage of the blockchain node. . If there is no new block, global data will be constructed based on the persistent write operation instructions stored locally in the blockchain node.

In the embodiment of this application, after it is detected that a new block is generated on the blockchain, the write operation instructions stored in the new block are persisted to the local storage of the blockchain node. After each startup or recovery of the blockchain node After the running state, global data can be constructed based on the persistent write operation instructions in local storage without having to read each block of the blockchain to obtain each write operation instruction, shortening the time required to build global data. Improve the efficiency of building global data.

While a certain blockchain node stops running, other blockchain nodes may perform one or more write operations on global data, and then one or more new data will be generated on the blockchain while the blockchain node stops running. Add blocks. After the blockchain node starts or resumes operation, the newly added blocks on the blockchain during the period when the blockchain node stops running can be determined, and the write operation instructions in the newly added blocks can be persisted. into the local storage of the blockchain node, and then when constructing global data based on each write operation instruction persisted in the local storage, the accuracy of the constructed global data can be guaranteed, thereby ensuring the consistency of global data between each blockchain node. consistency.

In one possible implementation, when determining the new blocks on the blockchain during the period when the blockchain node stops running, the first block corresponding to the latest persistent write operation instruction on the blockchain node can be determined, Then, the second block on the blockchain with a block sequence number greater than the first block is determined as a new block on the blockchain during the period when the blockchain node stops running.

According to the generation time of the block, the sequence number of the block in the blockchain increases. For example, the block sequence number of the first block in the blockchain is 0, the block sequence number of the second block is 1, and the block sequence number of the Nth block is 1. The block sequence number of a block is N-1, and N is a positive integer greater than 2. Therefore, the generation order of blocks can be determined based on the block sequence number.

Each write operation instruction persisted in the local storage of the blockchain node has a block identifier. The block identifier is the block sequence number corresponding to the block on the blockchain where the write operation instruction is stored. According to the latest persistence on the blockchain node The block identifier of the written operation instruction can be used to determine the first block on the blockchain that stores the latest persistent write operation instruction, and then the second block on the blockchain with a block sequence number greater than the first block can be determined. Confirmed as a new block.

If the block sequence number of the first block is N, and the block sequence number of the last block on the blockchain is also N, that is, the largest block sequence number among the blocks on the blockchain is N, then there is no second Block, that is, there are no new blocks on the blockchain during the period when the blockchain node stops running. If the block sequence number of the first block is N, and the block sequence number of the last block on the blockchain is greater than N, then the block corresponding to the block sequence number N on the blockchain is not the last one on the blockchain. Block, at this time, each block on the blockchain with a corresponding block number greater than N is determined as a new block. The number of new blocks can be one or more.

In this embodiment of the present application, since the block serial numbers of the blocks on the blockchain increase sequentially according to the generation time, after determining the first block that stores the latest persistent write operation instructions on the blockchain node, it can be based on the first block. The block sequence number of a block and the block sequence number of each block on the blockchain determine the new blocks generated when the blockchain node stops running, ensuring that the write operation instructions stored in each new block can be persisted to The local storage of the blockchain node ensures the accuracy of the constructed global data when constructing global data based on persistent write operation instructions on the blockchain node.

In one possible implementation, when determining the new blocks on the blockchain during the period when the blockchain node stops running, the third block corresponding to the latest persistent write operation instruction on the blockchain node can be determined, Then, based on the timestamps stored in each block on the blockchain, the fourth block whose generation time indicated by the corresponding time window is later than the third block is determined, and then the fourth block is determined as the period during which the blockchain node stops running. New blocks on the blockchain.

Each block in the blockchain not only stores write operation instructions, but also stores the block sequence number and timestamp. The timestamp can indicate the generation time of the corresponding block. Since blocks on the blockchain are generated sequentially in chronological order, the order in which blocks are generated can be determined based on the timestamps stored in the blocks.

If the block generation time indicated by the timestamp stored in the third block is the same as the block generation time indicated by the timestamp stored in the last block on the blockchain, then the last block on the blockchain is the third block. Three blocks, there is no fourth block at this time, that is, there are no new blocks on the blockchain during the period when the blockchain node stops running. If the block generation time indicated by the timestamp stored in the third block is earlier than the block generation time indicated by the timestamp stored in the last block on the blockchain, the generation time indicated by the stored timestamp will be later than that of the first block. Each block whose timestamp indicates the time stored in the block is determined as the fourth block, and each fourth block is determined as a new block on the blockchain during the period when the blockchain node stops operating. The number of fourth blocks Can be one or more.

In the embodiment of this application, since the blocks on the blockchain are generated sequentially in chronological order, and new write operation instructions are stored in the new blocks, it is necessary to determine the storage of the latest persistent write operation instructions on the blockchain node. After the third block, the fourth block whose generation time is later than the third block can be determined based on the timestamp stored in the third block and the timestamps stored in each block on the blockchain, and then each block can be The fourth block is determined to be the new block generated when the blockchain node stops running. It ensures that the write operation instructions stored in each new block can be persisted to the local storage of the blockchain node, thereby ensuring that all the global Accuracy of data.

In one possible implementation, when a user writes global data through the current blockchain node, he or she can receive at least one write operation instruction for the global data, and then create a new block on the blockchain and receive Each write operation instruction is stored in the new block created.

When the user of the current blockchain node adds, deletes or modifies global data, he or she can receive the corresponding write operation instructions when adding, deleting or modifying global data, and then create a new block on the blockchain, and Store the received write operation instructions into a new block. Based on the synchronization mechanism of the blockchain, the new block created by the current blockchain node will be synchronized to the blockchain on other blockchain nodes, making other blocks Chain nodes can update global data based on new blocks on the blockchain to ensure the consistency of global data between blockchain nodes.

In the embodiment of this application, the blockchain node can not only update the writing operations of other blockchain nodes on global data based on the new block, but also generate new blocks to store the writing operation instructions of the current blockchain node on global data, so that every Each blockchain node can store the write operation instructions for global data on the blockchain, and can update the global data based on the write operation instructions stored on the blockchain. Based on the synchronization mechanism of the blockchain, it can be guaranteed The consistency of global data among various blockchain nodes can also ensure the timeliness of synchronizing global data.

In a possible implementation, the write operation instructions for global data include at least one of a data addition instruction, a data deletion instruction, and a data modification instruction.

The data new instruction is used to add new data entries in the global data. For example, the global data includes data 1 to data 100, a total of 100 data. The data new instruction is used to instruct the new data 101 in the global data. Based on this data, After the add instruction writes the global data, the global data includes data 1 to data 101, a total of 101 pieces of data.

The data deletion instruction is used to delete data entries in the global data. For example, the global data includes data 1 to data 101, a total of 101 pieces of data. The data deletion instruction is used to instruct the deletion of data 1 and data 2 in the global data. Based on the data deletion After the instruction writes the global data, the global data includes a total of 99 pieces of data from data 3 to data 101.

The data modification instruction is used to modify one or more data items in the global data. For example, the global data includes data 1 to data 100, which counts 100 pieces of data. The data modification instruction is used to instruct data 10 in the global data to be modified. After the global write operation is performed based on this data modification instruction, data 10 in the global data is modified to data 10'.

In the embodiment of the present application, the write operation instructions include at least one of a data addition instruction, a data deletion instruction, and a data modification instruction. Therefore, any write operation instruction that changes global data through addition, deletion, modification, etc. will be Stored on the blockchain, all changes made by each blockchain node to global data can be synchronized to other blockchain nodes, ensuring the reliability and effectiveness of global data synchronization between blockchain nodes.

Figure 2 is a flow chart of a data synchronization method according to another embodiment of the present application. As shown in Figure 2, the data synchronization method 200 includes the following steps:

Step 201: After the blockchain node starts or resumes operation, persist the write operation instructions stored in the newly added block to the local storage of the blockchain node.

After the blockchain node starts or resumes operation, it is determined that the blockchain node stops running the new blockchain on the interval blockchain, and then the write operation instructions stored in each new block are persisted to the blockchain node. local storage.

It should be noted that the method for determining new blocks has been described in detail in the foregoing embodiments, and will not be described again here.

Step 202: Load each write operation instruction persisted in the local storage of the blockchain node.

The write operation instructions stored in each block on the blockchain will be persisted to the local storage of the blockchain node. When there is no new block on the blockchain, load each write operation instruction that has been persisted to the local storage of the blockchain node before the blockchain node stops running. When there is a new block on the blockchain, after persisting the write operation instructions stored in each new block to the local storage of the blockchain node, load each write operation instruction persisted in the local storage of the blockchain node. Operating instructions.

Step 203: Construct global data according to each write operation instruction, and store and cache the global data locally on the blockchain node.

After loading each write operation instruction persisted in the local storage of the blockchain node, each write operation instruction is re-executed in sequence according to the time sequence of the corresponding write operation, the global data is constructed, and the constructed global data is cached in the area. Local storage of blockchain nodes.

Step 204: Monitor the generation of new blocks on the blockchain.

When the blockchain node is in running state, it detects the generation of new blocks on the blockchain. It should be noted that the generation method of new blocks on the blockchain and the synchronization method of the blockchain can be implemented through innovative methods or through existing methods, which are not limited by the embodiments of this application.

Step 205: Determine whether a new block is generated on the blockchain. If yes, execute step 206. If not, execute step 204.

Step 206: Update the global data according to the write operation instructions stored in the new block.

When it is determined that a new block is generated on the blockchain, it means that a blockchain node has written to the global data, and the write operation instructions stored in the new block indicate the write operation to the global data, and the new block will The stored write operation instructions are persisted to the local storage of the blockchain node, and the local cached global data is updated according to the write operation instructions stored in the new block to achieve global data synchronization between each blockchain node.

For example, blockchain nodes can monitor the online status of monitored devices such as PLCs and sensors. The global data is the number of monitored devices online. The number of monitored devices currently online is 0, that is, the global data is equal to 0. When two monitored devices come online and one monitored device goes offline, the update process of the global data is 0+1+1-1, and the global data after the update is equal to 1.

Data synchronization device

Figure 3 is a schematic diagram of a data synchronization device according to an embodiment of the present application. The data synchronization device is applied to a blockchain node. As shown in Figure 3, the data synchronization device 300 includes:

Monitoring module 301 is used to monitor the generation of new blocks on the blockchain, where the blockchain is used to store write operation instructions for global data;

The acquisition module 302 is used to acquire the write operation instructions stored in the new block after the monitoring module detects that a new block is generated on the blockchain;

The update module 303 is used to update the global data cached locally by the blockchain node according to the write operation instructions stored in the new block.

In this embodiment of the present application, the monitoring module 301 can be used to perform step 101 in the above method embodiment, the acquisition module 302 can be used to perform step 102 in the above method embodiment, and the update module 303 can be used to perform the steps in the above method embodiment. 103.

Figure 4 is a schematic diagram of a data synchronization device according to another embodiment of the present application. As shown in Figure 4, based on the data synchronization device shown in Figure 3, the data synchronization device 300 also includes a building module 304. The building module 304 can construct global data based on each write operation instruction for the global data after the blockchain node starts or resumes running status, and caches the constructed global data into the local storage of the blockchain node.

In a possible implementation, when building global data based on each write operation instruction for global data, the building module 304 can read the write operation instructions for global data from each block of the blockchain, and then read the Each write operation instruction received constructs global data.

In a possible implementation, the acquisition module 302 can persist the write operation instructions stored in the new block to the local storage of the blockchain node. When building the global data based on each write operation instruction for the global data, the building module 304 can determine the new blocks on the blockchain during the period when the blockchain node stops running, and store the write operations in each new block. The instructions are persisted to the local storage of the blockchain node, and then global data is constructed based on each write operation instruction persisted in the local storage of the blockchain node.

In a possible implementation, when the building module 304 determines the new block on the blockchain during the period when the blockchain node stops running, it can determine the number of blocks corresponding to the latest persistent write operation instruction on the blockchain node. One block, and then determine the second block on the blockchain with a block sequence number greater than the first block as a new block on the blockchain during the period when the blockchain node stops running.

In a possible implementation, when the building module 304 determines the new block on the blockchain during the period when the blockchain node stops running, it can determine the number of blocks corresponding to the latest persistent write operation instruction on the blockchain node. Three blocks, and based on the timestamp stored in the block on the blockchain, determine the fourth block whose generation time indicated by the corresponding timestamp is later than the third block, and then determine the fourth block as the blockchain node New blocks on the blockchain during the shutdown period.

Figure 5 is a schematic diagram of a data synchronization device according to another embodiment of the present application. As shown in Figure 5, based on the data synchronization device shown in Figure 3, the data synchronization device 300 also includes a creation module 305. The creation module 305 may receive at least one write operation instruction for global data, create a new block on the blockchain, and store the received at least one write operation instruction into the created new block.

It should be noted that the information interaction, execution process, etc. between the modules in the above-mentioned data synchronization device are based on the same concept as the aforementioned data synchronization method embodiment. For specific content, please refer to the description in the aforementioned data synchronization method embodiment. No further details will be given here.

computer equipment

Figure 6 is a schematic diagram of a computer device according to an embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the computer device. Referring to Figure 6, the computer device 600 provided by the embodiment of the present application includes: a processor 602, a communication interface 604, a memory 606, and a communication bus 608. in:

The processor 602, communication interface 604, and memory 606 communicate through a communication bus 608.

Communication interface 604 is used to communicate with other computer devices or servers.

The processor 602 is configured to execute the program 610, and specifically may execute the relevant steps in any of the foregoing data synchronization method embodiments.

Specifically, program 610 may include program code including computer operating instructions.

The processor 602 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application. The one or more processors included in the smart device can be the same type of processor, such as one or more CPUs; or they can be different types of processors, such as one or more CPUs and one or more ASICs.

Memory 606 is used to store programs 610. Memory 606 may include high-speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

The program 610 can be specifically used to cause the processor 602 to execute the data synchronization method in any of the foregoing embodiments.

For the specific implementation of each step in the program 610, please refer to the corresponding steps and corresponding descriptions in the units in any of the foregoing data synchronization method embodiments, and will not be described again here. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described devices and modules can be referred to the corresponding process descriptions in the foregoing method embodiments, and will not be described again here.

Through the computer equipment of the embodiment of the present application, each node included in the distributed system serves as a blockchain node of the blockchain system. The blockchain is used to store write operations for global data, and each blockchain node performs operations on the global data. After the write operation, the corresponding write operation instructions will be stored in the new block of the blockchain, and based on the synchronization mechanism of the blockchain, the new block will be synchronized to the blockchain on each blockchain node, so when monitoring After a new block is generated on the blockchain, the global data in the local cache of the blockchain node can be updated according to the write operation instructions stored in the new block to ensure that the local cache of each blockchain node has the same global data. Achieve data consistency between nodes in the distributed system. Since each node locally caches the latest global data, if any node fails, other nodes can still operate normally, thus ensuring the reliability of the distributed system operation. Since the write operation instructions for global data are stored on the blockchain, the security of global data can be improved based on the non-tamperable and traceable characteristics of data on the blockchain.

computer readable storage media

The present application also provides a computer-readable storage medium that stores instructions for causing a machine to perform the data synchronization method as described herein. Specifically, a system or device equipped with a storage medium may be provided, on which the software program code that implements the functions of any of the above embodiments is stored, and the computer (or CPU or MPU) of the system or device ) reads and executes the program code stored in the storage medium.

In this case, the program code itself read from the storage medium can implement the functions of any one of the above embodiments, and therefore the program code and the storage medium storing the program code form part of this application.

Examples of storage media for providing program codes include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), Tapes, non-volatile memory cards and ROM. Alternatively, the program code can be downloaded from the server computer via the communications network.

In addition, it should be clear that the above embodiments can be implemented not only by executing the program code read by the computer, but also by causing the operating system etc. operating on the computer to complete some or all of the actual operations through instructions based on the program code. function of any embodiment.

In addition, it can be understood that the program code read from the storage medium is written into the memory provided in the expansion board inserted into the computer or written into the memory provided in the expansion module connected to the computer, and then based on the program code The instructions cause the CPU installed on the expansion board or expansion module to perform part or all of the actual operations, thereby realizing the functions of any of the above embodiments.

computer program product

Embodiments of the present application also provide a computer program product, which is tangibly stored on a computer-readable medium and includes computer-executable instructions that, when executed, cause at least one processor to Execute the data synchronization method provided by the above embodiments. It should be understood that each solution in this embodiment has the corresponding technical effects in the above method embodiment, and will not be described again here.

It should be noted that not all steps and modules in the above-mentioned processes and system structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented by multiple Some components in separate devices are implemented together.

In the above embodiments, the hardware module can be implemented mechanically or electrically. For example, a hardware module may include permanently dedicated circuitry or logic (such as a specialized processor, FPGA, or ASIC) to complete the corresponding operation. Hardware modules may also include programmable logic or circuits (such as general-purpose processors or other programmable processors), which can be temporarily set by software to complete corresponding operations. The specific implementation method (mechanical method, or dedicated permanent circuit, or temporarily installed circuit) can be determined based on cost and time considerations.

The present application has been shown and described in detail through the drawings and preferred embodiments above. However, the present application is not limited to these disclosed embodiments. Based on the above-mentioned multiple embodiments, those skilled in the art will know that different above-mentioned embodiments can be combined. The code review means in this application can lead to more embodiments of this application, and these embodiments are also within the protection scope of this application.

Claims

A data synchronization method (100), applied to blockchain nodes, the data synchronization method includes:

Monitor the generation of new blocks on a blockchain used to store write operation instructions for global data;

After monitoring that a new block is generated on the blockchain, obtain the write operation instructions stored in the new block;

According to the write operation instructions stored in the new block, the global data cached locally by the blockchain node is updated.
The method of claim 1, further comprising:

After the blockchain node is started or restored to operating status, global data is constructed based on each write operation instruction for global data, and the constructed global data is cached in the local storage of the blockchain node.
The method according to claim 2, wherein said constructing global data based on each write operation instruction for global data includes:

Read write operation instructions for global data from each block of the blockchain;

Build global data based on each read write operation instruction.
The method according to claim 2, wherein the method further comprises: persisting the write operation instructions stored in the new block to the local storage of the blockchain node;

The construction of global data based on each write operation instruction for global data includes:

Determine new blocks on the blockchain during the period when the blockchain node stops operating;

Persist the write operation instructions stored in each newly added block to the local storage of the blockchain node;

Global data is constructed according to each write operation instruction persisted in the local storage of the blockchain node.
The method according to claim 4, wherein the determining of new blocks on the blockchain during the period when the blockchain node stops operating includes:

Determine the first block corresponding to the latest persistent write operation instruction on the blockchain node;

The second block on the blockchain with a block sequence number greater than the first block is determined as a new block on the blockchain during the period when the blockchain node stops running.
The method according to claim 4, wherein the determining of new blocks on the blockchain during the period when the blockchain node stops operating includes:

Determine the third block corresponding to the latest persistent write operation instruction on the blockchain node;

According to the timestamp stored in the block on the blockchain, determine the fourth block whose generation time indicated by the corresponding timestamp is later than the third block;

The fourth block is determined to be a newly added block on the blockchain during the period when the blockchain node stops operating.
The method of claim 1, further comprising:

Receive at least one write operation instruction for global data;

Create a new block on the blockchain, and store the received at least one write operation instruction into the created new block.
The method according to any one of claims 1 to 7, wherein the write operation instructions for global data include at least one of a data addition instruction, a data deletion instruction and a data modification instruction.
A data synchronization device (300), applied to blockchain nodes, the data synchronization device (300) includes:

Monitoring module (301), used to monitor the generation of new blocks on the blockchain, where the blockchain is used to store write operation instructions for global data;

The acquisition module (302) is used to acquire the write operation instructions stored in the new block after the monitoring module detects that a new block is generated on the blockchain;

An update module (303), configured to update the global data cached locally by the blockchain node according to the write operation instructions stored in the new block.
A computer device (600), including: a processor (602), a communication interface (604), a memory (606) and a communication bus (608), the processor (602), the memory (606) and the The communication interface (604) completes mutual communication through the communication bus (608);

The memory (606) is used to store at least one executable instruction. The executable instruction causes the processor (602) to execute the data synchronization method (100) corresponding to any one of claims 1-8. operate.
A computer-readable storage medium. Computer instructions are stored on the computer-readable storage medium. When executed by a processor, the computer instructions cause the processor to execute the method described in any one of claims 1-8. method.
A computer program product tangibly stored on a computer-readable medium and comprising computer-executable instructions which, when executed, cause at least one processor to perform a process according to claims 1-8 any one of the methods.