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Method and system for storing copies using chain cloning

A technology that uses chains and depends on chains. It is applied to the generation of response errors, the input/output process of data processing, and the redundancy in computing for data error detection. It can solve the problem of reducing storage thin provisioning volumes, etc.

Active Publication Date: 2019-11-19
INT BUSINESS MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of backup copy typically results in a thinly provisioned volume that may reduce storage

Method used

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  • Method and system for storing copies using chain cloning
  • Method and system for storing copies using chain cloning
  • Method and system for storing copies using chain cloning

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Embodiment Construction

[0047] The described method and system solves the problem of cloning a volume and all its snapshots by extending the dependency chain to the grid structure. Moreover, it achieves this goal without increasing the metadata footprint beyond known methods.

[0048] The point-in-time copy implementation gains the illusion of the presence of the second image by redirecting read I / O addressed to the second image (future destination) to the original image (future source) unless the region has been subject to a write. In the case that the region has become the object of writing (to the source or destination), then in order to maintain the illusion that both the source and the destination have their own copy of the data, the process of the operation of the hover write command is invoked, and in the case where it does not take effect Next, issue a read of the affected region from the source, apply the read data to the target with a write, and then (and only if all steps succeed) release ...

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PUM

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Abstract

A method and system for storage copying using chain clones is provided, comprising: providing a volume with one or more snapshots in a chain of dependencies, wherein the volume and the one or more snapshots are in the chain of dependencies and providing associated metadata required to maintain the one or more snapshots; cloning the dependency chain to create at least one of a sparse copy of the volume and the one or more snapshots comprising the resulting sparse volume node Sparse copy chains, resulting in a grid structure of dependent chains of volume nodes and one or more sparse copy chains of cloned volume nodes.

Description

technical field [0001] The present invention relates to computer storage systems and, more particularly, to storage with point-in-time copies using chain cloning. Background technique [0002] In the field of computer storage systems there is a growing need for what has been described as "advanced functionality". Such functionality goes beyond the simple input / output (I / O) functionality of conventional memory controller systems. Advanced functionality depends on the control of metadata used to maintain state data about real or "user" data stored in the system. Operations available using advanced functions enable the rapid application of various actions to a virtual image of data while making the real data available for consumption by user applications. [0003] One such advanced feature is point-in-time copy. An example of a point-in-time copy is IBM and FlashCopy are trademarks of International Business Machines Corporation, registered in many jurisdictions around th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F11/14
CPCG06F3/061G06F3/0631G06F3/065G06F3/067G06F3/0674G06F11/1448G06F3/0619G06F3/0689G06F3/0646G06F11/1446G06F2201/84
Inventor C.B.E.贝肯J.K.布朗
Owner INT BUSINESS MASCH CORP