Fast photographic system and method

A snapshot and logical volume technology, applied in the direction of response error generation, redundant data error detection in operation, etc., can solve the problem of limiting the application mode of snapshot, and achieve the expansion of application mode and application scope and multi-application mode. Effect

Active Publication Date: 2007-01-17
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

How to apply the snapshot technology to the data images generated by the snapshot technology again, that is, "snapshot-based snapshots", especially the repeated iteration of this snapshot logic (such as creating snapshots again for

Method used

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  • Fast photographic system and method

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Embodiment Construction

[0052] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0053] A snapshot system of the present invention. figure 2 It is an example of the snapshot logical structure of the snapshot system of the present invention. The logical volume 200 has two snapshots, namely the logical volume 201 and the logical volume 202. The logical volume 201 that is the snapshot of the logical volume 200 has two snapshots, namely the logical volume 203 and the logical volume 204. Similarly, the logical volume 203 as a snapshot of the logical volume 201 has another snapshot, which is the logical volume 205; the logical volume 204 as the snapshot of the logical volume 201 also has a snapshot, which is the logical volume 206. In the snapshot system of the present invention, the snapshot logic can be iterated, that is to say, the logical volume as a snapshot can also create a snapshot, and the snapshot system of the present invention can be...

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PUM

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Abstract

A snapshot system comprises processing unit of read/write request, physical storage resource of logic roll, basic roll recording and said logic roll with its interactive interface unit, snapshot roll recording and said logic roll with its interactive interface unit. It is featured as not only supporting to create snapshot on normal logic roll but also supporting to create snapshot on snapshot itself.

Description

Technical field [0001] The present invention relates to the technical field of computer storage, in particular to a snapshot system and method that not only supports snapshots based on initial data, but also supports snapshots based on the snapshot image itself. Background technique [0002] In the field of computer storage technology, the application requirements for obtaining a data map at a certain moment are very common. This kind of instant data mapping is also called "snapshot". Snapshots are widely used in data backup and recovery, data statistics and analysis and other fields. [0003] One widely used technique for obtaining snapshots is Copy-On-Write. When creating a snapshot, the copy-on-write technology does not copy all the contents of the initial data of the created snapshot to obtain a data image copy, but creates a data structure that records the modification of the initial data and a snapshot space for saving the data. Therefore, the snapshot creation process is v...

Claims

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Application Information

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IPC IPC(8): G06F11/14
Inventor 刘振军冯硕许鲁
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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