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Writable snapshot implementation method and system

A technology for implementing methods and objectives, applied in the field of writable snapshot implementation methods and systems, and can solve problems such as failure to meet business requirements and snapshot versions that can no longer be modified.

Inactive Publication Date: 2019-07-19
SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In a general file system, only the current version of the file can continue to be modified, and the snapshot version can no longer be modified, resulting in failure to meet business needs

Method used

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  • Writable snapshot implementation method and system
  • Writable snapshot implementation method and system
  • Writable snapshot implementation method and system

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Embodiment Construction

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0063] In a general existing file system, only the current version of the file can continue to be modified, and the snapshot version cannot be modified, resulting in failure to meet business needs. The embodiment of the present application discloses a writable snapshot implementation method, which can realize the modification of the snapshot and reduce disk space occupation.

[0064] see figure 1 , a flow chart of a writable snapshot implementation method disclosed in the embodimen...

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Abstract

The invention discloses a writable snapshot implementation method and system, and the method comprises the steps: recording the creation information of a current creation request through a metadata server when the creation request of a snapshot file is received; after a first modification request for the snapshot file is received, obtaining a first target snapshot name in the first modification request, and obtaining corresponding creation information in the metadata server by using the first target snapshot name; and issuing the first modification request, the first target snapshot name and the creation information to a server, so that the server determines a first target modification object according to the first target snapshot name and the creation information, and modifies the copiedfirst target modification object according to the first modification request after the target modification object is copied. When the snapshot is created, only the currently created information is recorded, and when snapshot version data really needs to be modified, the target modification object is copied, so that the modification of the snapshot version of the file is realized, and meanwhile, the occupation of the disk space is greatly reduced.

Description

technical field [0001] The present application relates to the field of computer technology, and more specifically, to a method and system for implementing writable snapshots. Background technique [0002] The common distributed file system architecture is composed of DOS (Distributed Object Storage System), MDS (Metadata Service) and CA (Client Agent) at the bottom. Among them, DOS is composed of multiple server devices, responsible for data Reliably distributed to these devices, it provides an object-based data access interface; MDS provides metadata services, in which metadata can be stored in DOS or independently; CA interacts with MDS and DOS at the same time, and implements the file access interface externally; The data of the file is divided into data blocks of a certain size, and each block is stored in DOS as an object. [0003] Snapshot is an efficient data protection technology in the file system. After modifying the file data, the user can create a snapshot. If t...

Claims

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Application Information

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IPC IPC(8): G06F16/11G06F16/182
CPCG06F16/128G06F16/182
Inventor 肖国栋
Owner SUZHOU LANGCHAO INTELLIGENT TECH CO LTD