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Increment snapshot method and apparatus

An incremental snapshot and incremental technology, applied in the direction of input/output to record carrier, etc., can solve the problem of heavy data replication workload and achieve the effect of reducing workload

Active Publication Date: 2015-11-11
INSPUR BEIJING ELECTRONICS INFORMATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many scientific research institutions and storage system manufacturers have developed technologies for implementing snapshots in storage subsystems, but these snapshot technologies mainly focus on achieving snapshots at a single point in time, while snapshots at consecutive points in time for the same data object It is only processed as multiple independent snapshots, and the workload of data replication is heavy

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  • Increment snapshot method and apparatus

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] The embodiment of the present invention discloses an incremental snapshot method and device, so as to reduce the data duplication workload of the same data object at consecutive time points.

[0046] see figure 1 , an incremental snapshot method provided by an embodiment of the present invention, comprising:

[0047] S101. Copy the original data of the source data volume at the initial snapshot time point to the snapshot volume, and display the copy result ...

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Abstract

The embodiment of the invention discloses an increment snapshot method and an apparatus. The method comprises steps of copying original data of source data coil in an initial snapshot time point on a snapshot coil, displaying copying results of the snapshot coil on a control bit map, displaying updated data block position of the source data coil on an increment bit map, conducting xor processing for the control bit map and the increment bit map to achieve a control bit map for a next snapshot time point, copying the data in the source data coil on the snapshot coil according to the control bit map of the next snapshot time point, and displaying the updated data block position of the source data coil in the next snapshot time on the increment bit map. Updated data in the source data coil can be only copied, so work amount of data copying in the continuous time point can be reduced; and an entire physical copy for the source data coil in any time points can be achieved via reverse reasoning via the increment bit map and the control bit map.

Description

technical field [0001] The present invention relates to the technical field of snapshots, and more specifically, to an incremental snapshot method and device. Background technique [0002] The Storage Networking Industry Association (SNIA) defines a snapshot as: a snapshot generates a fully available copy of a data object, which includes an image of the data object at a certain point in time. At present, many scientific research institutions and storage system manufacturers have developed technologies for implementing snapshots in storage subsystems, but these snapshot technologies mainly focus on achieving snapshots at a single point in time, while snapshots at consecutive points in time for the same data object It is only processed as multiple independent snapshots, and the workload of data replication is heavy. [0003] Therefore, how to reduce the workload of data replication of the same data object at continuous time points is a problem that needs to be solved. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 成金祥李大生刘志勇
Owner INSPUR BEIJING ELECTRONICS INFORMATION IND