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Data recovery method and device

A recovery method and data technology, applied in the storage field, can solve the problem of ignoring the balance of consistency and availability

Active Publication Date: 2018-01-05
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the traditional way, when the OSD fails, the balance of consistency and availability is ignored

Method used

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Embodiment Construction

[0021] The terminology used in this application is only for the purpose of describing specific embodiments, rather than limiting this application. The singular forms of "a", "said" and "the" used in this application and claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" as used herein refers to any or all possible combinations of one or more associated listed items.

[0022] It should be understood that, although the terms first, second, third, etc. may be used in this application to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information. Dependin...

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Abstract

The invention provides a data recovery method and device. The method comprises the steps that to-be-recovered data is determined, and data information of the to-be-recovered data is written into a first mapping table; when a write request sent by a client is received, whether or not the data information matched with the write request exists in the first mapping table is judged, if yes, the data information matched with the write request is written into a second mapping table, and the data information matched with the write request is deleted from the first mapping table; a storage node corresponding to the write request is determined, and the write request is sent to the storage node to enable the storage node to write data according to the write request; and after a data write completingmessage sent by the storage node is received, it is determined that processing of the write request is completed, the data information matched with the write request is queried out from the second mapping table, and data recovery is conducted by means of the queried-out data information. According to the technical scheme, the IO service availability can be improved, and the data reliability can beguaranteed.

Description

Technical field [0001] This application relates to the field of storage technology, and in particular to a data recovery method and device. Background technique [0002] With the advent of the era of big data, more and more distributed systems have emerged, and distributed storage systems (such as distributed storage systems such as Ceph) are an important part. The data generated by big data and cloud computing must pass Distributed storage system for storage. Among them, the distributed storage system can include multiple OSDs (Object Storage Device, object storage device), data can be stored in the OSD, each data (without special instructions, the "data" in this article refers to the data object ) Can be stored on at least two OSDs, thereby backing up the data and ensuring the safety of data storage. [0003] For example, a distributed storage system includes OSD1, OSD2, and OSD3, and data 1 can be stored in OSD1, OSD2, and data 2 can be stored in OSD1, OSD3, and so on. In thi...

Claims

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Application Information

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IPC IPC(8): G06F11/14G06F3/06
Inventor 陈云辉
Owner NEW H3C TECH CO LTD
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