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Distributed RAID (redundant array of independent disks) establishing method and device

A redundant and distributed technology for independent disks, applied in the direction of input/output to the record carrier, etc., which can solve the problems of centralization and data access hot spots.

Active Publication Date: 2013-01-16
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the embodiment of the present invention provides a method and device for creating a distributed RAID to solve the problem that in the prior art, the IO data access of the host may be concentrated in a certain area of ​​one of the RAID groups, thereby causing data access hotspots The problem

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  • Distributed RAID (redundant array of independent disks) establishing method and device

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Embodiment Construction

[0043] In order to solve the problem in the prior art that the IO data access of hosts may be concentrated in a certain area of ​​one of the RAID groups, thereby causing data access hotspots, the embodiments of the present invention provide a method and device for creating a distributed RAID.

[0044] like figure 2 As shown, a method for creating a distributed RAID provided by an embodiment of the present invention is used to create a disk group that can create at least two groups of RAID groups. The method includes:

[0045] 101. Divide each disk in the disk group into multiple disk blocks with the same capacity.

[0046] Wherein, the disk capacity of the disk block can be specified arbitrarily, and can be set according to the number of disks in the disk group and the capacity of the disks.

[0047] Wherein, the capacities of the multiple disks included in the disk group may be the same or different. If not all disks have the same capacity, you can select the disk with the...

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Abstract

The invention embodiment discloses a distributed RAID (redundant array of independent disks) establishing method and a distributed RAID establishing device, which belong to the technical field of RAID, and solve the problem of the prior art that as the IO data access of the host might be concentrated in an area of a RAID group, a data access hotspot is produced. The technical scheme includes the following steps: dividing each disk in a disk pack into multiple disk blocks with identical capacity; selecting corresponding disk blocks from each disk according to the preset only mapping relation to be combined into a virtual disk and then establishing a virtual disk group; establishing a RAID group according to the virtual disk group; and striping the RAID group and reading-writing data through the striped RAID group. The distributed RAID establishing method and distributed RAID establishing device can be applicable to the disk group established with at least two groups of RAID groups.

Description

technical field [0001] The present invention relates to the technical field of redundant array of independent disks (Redundant Access Independent Disk, hereinafter referred to as RAID), in particular to a distributed RAID creation method and device. Background technique [0002] RAID is a high-performance, high-reliability storage technology that combines a series of individual disks in different ways to provide logical disks for application terminals or terminal clusters. RAID technology has been widely used in various occasions of data storage. Commonly used RAID technologies include RAID0, RAID1, RAID5, RAID6, RAID10, etc.; RAID0 does not have redundancy capabilities, and RAID1 is not a complete disk array; while RAID5, RAID6, RAID10 consists of multiple disks (for example, no less than 3 disks for RAID5 and RAID6, and no less than 4 disks for RAID10). Each RAID writes data to the disks in the array in the form of stripes, and stores the parity data in disks in the array...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 李成
Owner HUAWEI TECH CO LTD
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