Data block redistribution method and device based on disk array extension

Abstract

The invention discloses a data block redistribution method and device based on disk array extension. The method comprises the steps that the current IO page view between disks in an original disk array is obtained; calling a neural network prediction model to predict the current IO page view of each disk in the original disk array to obtain a predicted IO page view corresponding to each disk; according to the predicted IO page view, determining a hot access disk in the original disk array; selecting a data block of which the current IO page view exceeds the average page view corresponding to the hot access disk from the hot access disk as a hot access data block; and according to a preset migration rule, migrating and rewriting the hot access data block into a newly added disk of the extended disk array. By implementing the method and the device, the problem that the overall balance of IO access cannot be realized in the prior art can be solved.

Description

technical field [0001] The present application relates to the technical field of cloud storage, in particular to a data block redistribution method and device based on disk array expansion. Background technique [0002] Inexpensive / Redundant Array of Independent Disks (Redundant Array of Independent Disks, RAID) is a mainstream storage technology in large data centers, which provides high reliability and high performance storage services at an acceptable cost of space and money. Massive data is stored in a large number of redundant disks to facilitate parallel access by users. [0003] In addition to increasing the physical capacity of a RAID system, adding additional disks to an existing raw array is an economical and cost-effective solution. Furthermore, high scalability allows massively parallel access to storage devices, which is a common requirement in various scenarios such as cloud computing. It avoids extremely high downtime costs and ultimately improves overall pe...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of this application is to provide a data block redistribution method and device based on disk array expansion, which can solve the problem existing in the prior art that ignores the workload of upper-layer application programs on the expansion of disk arrays. Dynamic impact, unable to achieve overall balance of IO access, etc.

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