Heterogeneous-database-replication parallel execution system and method based on synchronization of commit-point timelines

A database and timeline technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as low replication efficiency, achieve the effect of improving replication efficiency and solving low replication efficiency

Inactive Publication Date: 2017-05-31
TRAVELSKY +1
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  • Claims
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Problems solved by technology

It adopts parallel replication of heterogeneous databases based on timeline synchronization of submission points, which solves the technical problem of low replication efficiency caused by serial execution of transactions in the target database

Method used

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  • Heterogeneous-database-replication parallel execution system and method based on synchronization of commit-point timelines
  • Heterogeneous-database-replication parallel execution system and method based on synchronization of commit-point timelines
  • Heterogeneous-database-replication parallel execution system and method based on synchronization of commit-point timelines

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Embodiment 1

[0046] Such as Figure 5 , the log receiving thread receives the transaction log sequence of the source database:

[0047]The execution process of W1(a)W2(b)W3(c)W1(d)W2(e)C1W2(a)W3(d)W2(f)C2W3(a)C3. Among them, Wi(a) indicates that transaction i performs a write operation on data item a, and Ci indicates the commit operation of transaction i.

[0048] There are three commit operations in the log sequence, which divide the sequence into three segments as commit point timeline fences, and all operations in each segment can be executed in parallel.

[0049] The first commit operation encountered by the log receiving thread is C1. At this time, all operations W1(a)W1(d)C1 of transaction 1 are taken out from the log cached in memory and handed over to a certain execution thread for execution. The subsequent commit operation is C2. Similarly, all operations W2(b)W2(e)W2(a)W2(f)C2 of transaction 2 are taken out and handed over to an execution thread for execution. Finally, all ope...

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Abstract

The invention discloses a heterogeneous-database-replication parallel execution system and method based on synchronization of commit-point timelines. The system includes a source database, a target database and a replication system. The system and method have the advantages that for preventing destination-end events from execution failure, a traditional data replication system based on logs serially executes logs of various events according to the time sequences (LSN numbers) of the logs and does not consider the probability of the parallel execution of events. According to the system and method, commit-point timelines are adopted to form fences, the characteristic that all upload operations between two timelines do not colloid with one another is adopted, the operations are executed at the destination end in parallel, the replication efficiency is greatly improved, and the technical problem of the low replication efficiency caused by the serial execution of events in the target database is solved.

Description

technical field [0001] The invention relates to a heterogeneous database replication parallel execution method, in particular to a heterogeneous database replication parallel execution system and method based on submission point timeline synchronization. Background technique [0002] With the widespread application of enterprise information systems, information systems have become the key to maintaining business operations. The diversified business types of enterprises lead to increasingly complex data access requirements, and the sharp increase in data volume also causes the database server to be overwhelmed. Enterprises urgently need to improve the availability of information systems, ensure business continuity, and minimize losses caused by disasters or failures. For this reason, data replication of distributed heterogeneous databases is a commonly used technical means. [0003] At present, the transaction log of the source database is extracted to obtain the data opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 彭明田付铨孙峰王尧陈琦周英飚
Owner TRAVELSKY
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