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Method, system and equipment for optimizing copy-on-write storage snapshot management and medium

A copy-on-write, snapshot technology, applied in response error generation, electrical digital data processing, error detection of redundant data in operation, etc., can solve the problem of write performance degradation, write amplification increase, other snapshots unavailable And other issues

Active Publication Date: 2021-09-28
SHANDONG YINGXIN COMP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In the existing technology, when the number of snapshots increases, the write amplification will increase, resulting in a decrease in write performance, and deleting one of the snapshots will make other snapshots unavailable

Method used

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  • Method, system and equipment for optimizing copy-on-write storage snapshot management and medium
  • Method, system and equipment for optimizing copy-on-write storage snapshot management and medium
  • Method, system and equipment for optimizing copy-on-write storage snapshot management and medium

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

[0025] According to the first aspect of the embodiments of the present invention, an embodiment of a method for optimizing copy-on-write storage snapshot management is proposed. figure 1 What is shown is a schematic diagram of an embodiment of the m...

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Abstract

The invention discloses a method, system and equipment for optimizing copy-on-write storage snapshot management and a storage medium, and the method comprises the steps: in response to a triggering condition for triggering and setting a snapshot, creating a snapshot for a data block to be snapshot in an initial source volume to obtain a snapshot volume at the current moment; cascading and storing the snapshot volumes at different moments according to a creation time sequence to form a snapshot group, and establishing a copy-on-write relationship between the initial source volume and the last snapshot volume of the snapshot group; in response to deletion of a first snapshot volume in the snapshot group, judging whether the first snapshot volume is the first snapshot volume in the snapshot group; and responding to the situation that the first snapshot volume is not the first snapshot volume of the snapshot group, writing data of the first snapshot volume to a data block corresponding to a previous cascaded snapshot volume of the first snapshot volume, and forming a new cascade relationship. According to the method and the device, all snapshots can be still kept available when any snapshot is deleted or the source volume is recovered to any snapshot.

Description

technical field [0001] The present invention relates to the field of snapshots, and more specifically, to a method, system, computer equipment and readable medium for optimizing copy-on-write storage snapshot management. Background technique [0002] A snapshot is a fully available copy of a specified data set, and the copy includes an image of the corresponding data at a certain point in time (the point in time when the copy starts). A snapshot can be either a copy or a replica of the data it represents. The function of the snapshot is mainly to enable online data backup and recovery. When an application failure or file damage occurs on a storage device, fast data recovery can be performed, and the data can be restored to the state at a certain available point in time. Currently, storage snapshot technologies can be roughly divided into two categories, full snapshot and incremental snapshot. Incremental snapshot technologies mainly include COW (Copy-On-Write, copy-on-wri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
CPCG06F11/1448
Inventor 陈东河
Owner SHANDONG YINGXIN COMP TECH CO LTD