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multi-target rapid reconstruction system for a reconfigurable RAID

A system reconstruction, multi-objective technology, applied in the field of multi-eye fast reconstruction system, can solve the problem of reconstruction speed not meeting the expected effect, data loss and so on

Active Publication Date: 2019-06-11
BEIJING INST OF COMP TECH & APPL
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Problems solved by technology

[0006] From the above reconstruction process, it can be seen that traditional RAID1 and RAID5 select a spare disk for data recovery during reconstruction, and the write bandwidth of the spare disk directly determines the speed of system data reconstruction. In a high environment, such a reconstruction speed obviously does not meet the expected effect, and may even cause serious data loss, which will bring unpredictable consequences to the enterprise or research department

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[0044] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0045] In order to realize the rapid reconstruction of system data, the present invention designs a multi-objective rapid reconstruction system for reconfigurable RAID on the basis of analyzing the disadvantages of traditional RAID reconstruction mechanism. The system includes:

[0046]Dual disk selection module, used to select two spare disks for reconstruction, such as image 3 shown;

[0047] The dual-disk setting module is used to trigger the data reconstruction thread and perform dynamic and static disk settings;

[0048] The data reconstruction module is used for data reconstruction;

[0049] When rebuilding two disks, due to the importance of RAID metadata, it is necessary to reconstruct the metadata first, an...

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Abstract

The invention relates to a multi-target rapid reconstruction system for a reconfigurable RAID, and belongs to the technical field of data reconstruction. The method is based on analysis of defects existing in a traditional RAID reconstruction mechanism; A multi-target rapid reconstruction system for a reconfigurable RAID is designed. the characteristic that a stripe can be dynamically recombined in a floating RAID scheduling mechanism is fully utilized; When data reconstruction is carried out, the RAID reconstruction time is shortened by selecting a plurality of target disks for parallel reconstruction with a strip as a unit, the risk that data are completely lost due to disk damage again during reconstruction is reduced, and the use efficiency of the reconfigurable RAID is improved.

Description

technical field [0001] The invention belongs to the technical field of data reconstruction, and in particular relates to a multi-purpose rapid reconstruction system for reconfigurable RAID. Background technique [0002] Traditional RAID technology can still guarantee data integrity even if a disk fails. When replacing a faulty disk with a new disk (target disk), RAID will perform data reconstruction, that is, calculate the reconstructed data on the basis of reading all member disk data and write it to the target disk. Therefore, the write bandwidth of the target disk is directly Determines the speed of system data reconstruction. However, with the rapid growth of disk capacity in recent years, the disk read / write speed has grown slowly due to the influence of disk rotation speed and other aspects, which has been unable to meet the storage system's requirements for reconstruction time. Taking a 2TB 7.2k rpm disk as an example, the average write bandwidth of the disk during ...

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Application Information

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IPC IPC(8): G06F3/06
Inventor 喻崇仁马建鹏
Owner BEIJING INST OF COMP TECH & APPL
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