Method and device for improving reconstruction performance of virtual disk group

A virtual disk and performance technology, applied in the storage field, can solve problems such as ideal effect, achieve the effect of improving reconstruction performance and reducing memory consumption

Active Publication Date: 2015-12-09
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

However, in practice, the effect is not necessarily ideal

Method used

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  • Method and device for improving reconstruction performance of virtual disk group
  • Method and device for improving reconstruction performance of virtual disk group
  • Method and device for improving reconstruction performance of virtual disk group

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Embodiment Construction

[0025] Aiming at the problems in the background technology, after careful analysis, the inventor found that the main reasons for this situation are: 1) multiple VDs on the same disk participate in the reconstruction, and the time consumed by disk addressing is very large, resulting in reconfiguration. The performance of the structure will be reduced, and multiple VDs on each disk participate in the reconstruction, and the instantaneous memory occupation is relatively large, which will cause the demand for large-capacity memory; The number of VDs occupied by each physical disk is maintained in a balanced state. If the read and write speed of a disk is relatively slow, and multiple VDs are superimposed for reconstruction, the performance of the disk will be slower, which will affect the overall performance. Refactoring time.

[0026] Please refer to figure 1 , a storage pool consists of a set of disks, each sliced ​​in blocks (VDs) of the same size. When creating an upper-laye...

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Abstract

The invention provides a device for improving the reconstruction performance of a virtual disk group. The device comprises a reconstructed virtual disk group VDG selection module and a VDG reconstruction module. The reconstructed virtual disk group VDG selection module is used to select a VDG needing reconstruction when the number of VDGs in reconstruction supported by a system is not exceeded currently. When there is a VD in reconstruction in a PD where the VDs of the selected VDG needing reconstruction are located, the VDG is not reconstructed. When there is no VD in reconstruction in the PD where the VDs of the selected VDG needing reconstruction are located, the VDG is added to a reconstruction queue. The VDG reconstruction module is used to reconstruct VDGs in the reconstruction queue. By adopting the scheme, the memory consumption and the impact on the business are reduced on the basis of improving the reconstruction performance.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a method and device for improving the performance of virtual disk group reconstruction. Background technique [0002] The basic idea of ​​block virtualization technology is to cut a specified number of large-capacity hard disks (we call this group of hard disks the disks that make up the storage pool) into multiple blocks (VD, virtualdisk, virtual disk) according to the fixed capacity. Each VD builds a VDG according to the corresponding RAID policy; upper-layer resources are built on these VDGs. The storage system based on the block virtualization technology can realize that after a disk fails, all the disks in the storage pool will participate in the reconstruction concurrently, thereby reducing the reconstruction time. [0003] For traditional redundant arrays, if some areas of a disk fail, the entire disk needs to be reconstructed. The unfailed area is copied to the reconstr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/02
Inventor 郭永强王丽红李华英郭鹏洲台德莉肖永玲
Owner ZHEJIANG UNIVIEW TECH CO LTD
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