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Disk array online capacity expansion method and device and computer readable storage medium

A disk array and disk technology, applied in computing, instrumentation, electrical digital data processing, etc., can solve problems such as inability to meet flexible expansion requirements, achieve flexible and reliable expansion requirements, ensure data correctness, and increase expansion efficiency.

Active Publication Date: 2020-12-25
SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the RAID address space is completely fixed, it cannot meet the flexible expansion requirements under the original RAID configuration.

Method used

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  • Disk array online capacity expansion method and device and computer readable storage medium
  • Disk array online capacity expansion method and device and computer readable storage medium
  • Disk array online capacity expansion method and device and computer readable storage medium

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Embodiment Construction

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order . Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device compris...

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Abstract

The invention discloses a disk array online capacity expansion method and device and a computer readable storage medium. The method comprises the steps of adding a new disk to an initial disk array through on-line capacity expansion technology to generate a new disk array, wherein the initial disk array and the new disk array adopt the same distributed space distribution, so that the strip width,the strip partitioning capacity value and the backup space of the new address space distribution are the same as those of the old address space distribution; migrating the data read from the old address space corresponding to the initial disk array to the new address space corresponding to the new disk array according to a stripe form, and taking a reserved space of the new address space after alldata of the initial disk array is migrated as an expansion space. In the data migration process, the storage position of to-be-accessed data is determined according to the numerical relationship between the address of the received IO operation request and the address of the current migration strip, and interaction with the service IO is completed. The RAID is flexibly expanded on the basis of ensuring the original configuration of the RAID.

Description

technical field [0001] The present application relates to the technical field of disk array capacity expansion, in particular to a method, device and computer-readable storage medium for online capacity expansion of a disk array. Background technique [0002] With the wide application of Internet technology in all walks of life, data is growing explosively, and users have higher and higher requirements for the storage capacity of storage systems. RAID (Redundant Arrays of Independent Disks, disk array) was born as a new storage device instead of a traditional single disk. Disk array technology improves the throughput of the storage system through data striping technology, and improves the reliability of the storage system through data redundancy technology. sex. [0003] It is understandable that after a disk array is established, the available space of the disk array will become smaller and smaller as the user uses it for a longer period of time. At this time, it is necess...

Claims

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Application Information

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IPC IPC(8): G06F3/06
CPCG06F3/0689G06F3/0631G06F3/0647
Inventor 刘丹
Owner SUZHOU LANGCHAO INTELLIGENT TECH CO LTD