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Method and system for processing incremental snapshot

A technology of incremental snapshots and snapshots, applied in the direction of responding to errors, input/output to record carriers, etc., can solve the problem of on-demand merge and update of data that cannot be read-only snapshot volumes, achieve on-demand updates, and improve efficiency , save the effect of creating and deleting

Inactive Publication Date: 2014-04-30
TIANJIN ZHONGKE BLUEWHALE INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the traditional technology, the data of the read-only snapshot volume cannot be merged and updated on demand. The update of the data of the read-only snapshot volume is usually realized when the subsequent snapshot volume with the same source as the read-only snapshot volume is deleted.

Method used

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  • Method and system for processing incremental snapshot
  • Method and system for processing incremental snapshot

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Embodiment Construction

[0062] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementation manners of the incremental snapshot processing method and system of the embodiment of the present invention will be described below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0063] The incremental snapshot processing method of the embodiment of the present invention, such as figure 1 shown, including the following steps:

[0064] S100. Construct a snapshot volume corresponding to the source volume and having a preset logical block granularity. Construct a snapshot volume with the same logical block granularity as the data source volume, and divide the logical address space of the snapshot volume into logical blocks of the same size according to the logical block granularity. In this way, in ...

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Abstract

The invention discloses a method and system for processing an incremental snapshot. The method comprises the following steps of establishing a snapshot volume with preset logical block particle size corresponding to a source volume, and remapping new data blocks in an assigned source volume or an assigned snapshot volume to a target snapshot volume through remapping operation when data merging and updating need to be carried out on data blocks corresponding to an assigned logic block in the target snapshot volume with the preset logical block particle size and the new data block corresponding to the assigned logic block in the assigned source volume or the assigned source snapshot volume. According to the method and system for processing the incremental snapshot, the data merging and the updating are carried out on the logic block needing to be updated in an existing snapshot volume through the remapping operation, updating according to needs on an identical snapshot volume especially on non-writable snapshot data is achieved, flexibility of data storage and updating is improved, and data merging and updating efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of data storage, in particular to a method and system for incremental snapshot processing. Background technique [0002] According to the definition of the Storage Networking Industry Association (SNIA), a snapshot is a fully available copy of a specified data set, including an image of the corresponding data at the moment of copy initialization. A snapshot can be a copy of the data it represents at a particular moment, or a replica of the data at that moment. [0003] Snapshot technology is a key technology commonly used in data protection research fields such as backup, disaster recovery and version management. At present, there are many snapshot products and prototype systems at home and abroad, including the LVM snapshot that comes with the Linux kernel, EMC's TimeFinder, IBM's ESS FlashCopy, Netapp's WAFL snapshot, and so on. The snapshots supported by these typical products or systems are div...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/07G06F3/06
Inventor 王慧许鲁郭明阳
Owner TIANJIN ZHONGKE BLUEWHALE INFORMATION TECH
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