Method and device for data reconstruction

A data reconstruction and data technology, applied in the field of data reconstruction, can solve the problems of less VDG, long balancing time, and large difference in utilization rate.

Active Publication Date: 2016-08-10
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

[0004] In the prior art, during the VDG rebuilding process, if enough hot-standby VDs can be applied for on the original PD, the new PDs that have been expanded will seldom participate in the rebuilding process, and the number of VDGs allowed to be rebuilt at the same time is small , which leads to a long time spent in the reconstruction process. In addition, after the reconstruction is completed

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  • Method and device for data reconstruction
  • Method and device for data reconstruction

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[0045] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0046] See figure 1, illustrating a schematic diagram of a disk array in the related art. Wherein, the storage pool Pool includes the original disks PD1, PD2, PD3, PD4, PD5, PD6, PD7, and the expansion disk PD8. PD1 to PD7 have been divided according to the specified size to form multiple VDs (such as figure 1 The □ shown in indicates a VD), and some VDs in PD1 to PD7 have formed mult...

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Abstract

The invention discloses a method and a device for data reconstruction. The method comprises the following steps: determining the number T of hot standby VDs (Virtual Disks), wherein the hot standby VDs are those which do not participate in VDG (Virtual Disk Group) reconstruction on a normal disk; determining the number S of the hot standby VDs to be converted into idle VDs from the T hot standby VDs, wherein T and S are both natural integers which are greater than 0, and S is smaller than T; selecting the S hot standby VDs from the T hot standby VDs, converting the S hot standby VDs into the idle VDs, and converting the S idle VDs on a dilatation disk into hot standby VDs; enabling the hot standby VDs on the normal disk and the dilatation disk to participate in athe VDG reconstruction. By applying the method disclosed by the invention, the dilatation disk which is newly added is enabled to more participate in a reconstruction process, so that the efficiency of data reconstruction is increased, and meanwhile, the equalization time after reconstruction can be shortened.

Description

technical field [0001] The present application relates to the technical field of data storage, and in particular to a data reconstruction method and device. Background technique [0002] With the rapid development of science and technology and the widespread application of computer technology, people have higher and higher requirements on the performance of storage devices. As a mature technology, RAID (Redundant Arrays of Independent Disks, Redundant Array of Independent Disks) technology has been widely used in various occasions of data storage. RAID technology uses multiple PDs (Physical Disks) to build a storage pool. Each PD is divided into multiple VDs (Virtual Disks). Group, virtual disk group), providing logical resources to upper-layer clients for reading and writing. [0003] Under the block virtualization structure of the storage pool, when a certain PD fails, in order to prevent other PDs from also failing and causing the upper-layer business to be affected, an...

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Application Information

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IPC IPC(8): G06F3/06
CPCG06F3/0623G06F3/0689
Inventor 尧婷娟
Owner ZHEJIANG UNIVIEW TECH CO LTD
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