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Synchronous log copying control method and system for disaster recovery system

A synchronous replication and log technology, which is applied in the fields of response error generation, special data processing application, and redundant data error detection in computing, etc., can solve the problems of increasing the synchronous replication delay of disaster recovery system, and reduce IO operations, improved performance, reduced latency effects

Active Publication Date: 2017-10-24
SANGFOR TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, frequent log records bring frequent system IO operations, which greatly increases the synchronous replication delay of the disaster recovery system

Method used

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  • Synchronous log copying control method and system for disaster recovery system
  • Synchronous log copying control method and system for disaster recovery system
  • Synchronous log copying control method and system for disaster recovery system

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Embodiment Construction

[0080] The core of the present invention is to provide a synchronous replication log control method and system for a disaster recovery system, which can reduce the delay of the disaster recovery system and improve the performance of the storage system.

[0081] In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0082] In the following description, specific details are set forth in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0083] Please refer to figur...

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Abstract

The invention discloses a synchronous log copying control method and system for a disaster recovery system. The method comprises presetting memory data block ID (identity) record sets for memory logs and disk data block ID record sets for disk logs, wherein the memory data block ID record set is identical to the disk data block ID record set, and defining all the disk data block ID record sets to be data block sets with data correction and requiring synchronous copying; in real time acquiring data correcting operation information of a production center and a disaster recovery data to acquire data blocks IDs to be synchronously copied; determining whether the corrected data blocks IDs belong to the memory data block ID record sets; if so, forbidding triggering of update of the disk logs, otherwise, writing the corrected data block IDs into the memory data block ID record sets and the disk data block ID record sets. The synchronous log copying control method and system for the disaster recovery system exploits the time and space limitation of data correction operation of storage systems, reduces write-in delay of the disaster recovery system and improves disaster recovery copying performance.

Description

Technical field [0001] The present invention relates to the technical field of disaster recovery, in particular to a method and system for controlling a synchronous replication log for a disaster recovery system. Background technique [0002] Generally speaking, disaster recovery systems that do not tolerate data loss (ie, RPO=0) adopt a scheme based on real-time synchronous replication log records to ensure transaction atomicity of data synchronous replication and deal with various system exceptions. The synchronous replication will need to record the write status of the local production center and the write status of the disaster recovery center, so that the transaction atomicity of each write request can be guaranteed: after the system is abnormal, the write request is replayed according to the log record information. Operation, data synchronization between the disaster recovery center and the production center can be restored. However, frequent log records bring frequent sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06F11/14
CPCG06F11/1448G06F16/1815
Inventor 夏文刘应涛付忞吴大立古亮
Owner SANGFOR TECH INC
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