Storage system capacity expansion method and device, equipment and machine readable storage medium

A storage device and storage system technology, applied in the field of communications, can solve problems such as the inability to efficiently complete data balance, and achieve the effects of improving efficiency, high data transmission efficiency, and eliminating data transmission.
CN112463050APending Publication Date: 2021-03-09NEW H3C TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NEW H3C TECH CO LTD
Publication Date
2021-03-09

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Abstract

The invention provides a storage system capacity expansion method and device, equipment and a machine readable storage medium, and the method comprises the steps: calculating and generating migrationinformation according to a preset rule, wherein the migration information comprises codes of data units, needing to be migrated to all empty hard disks, in all data hard disks, and a mapping relationship between each data unit to be migrated and the corresponding immigrated empty hard disk; migrating each data unit needing to be migrated in each data hard disk into the corresponding empty hard disk according to the migration information; updating the mapping relationship between the data units in a mapping table and the hard disk according to a migration result; exchanging and installing a part of originally loaded empty hard disks of newly added storage equipment and a part of originally loaded data hard disks on the original storage equipment, so that the storage equipment comprises a plurality of empty hard disks and a plurality of data hard disks. Through the technical scheme of the invention, the efficiency of completing data equalization after capacity expansion of a storage polegroup is greatly improved.
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Description

technical field

[0001] The present disclosure relates to the technical field of communications, and in particular, to a storage system expansion method, device, equipment, and machine-readable storage medium. Background technique

[0002] Copy: (Replication): A technology used to ensure data persistence, which refers to retaining multiple identical copies of data in the system. Common such as 2 copies, 3 copies, etc.

[0003] Erasure Code: A technology used to ensure data persistence. It divides the data into fragments (N slices), and generates redundant fragments (M slices) according to a certain algorithm, and can reconstruct the lost data according to the remaining data in the case of partial data loss (no more than M slices). This segmentation method is generally denoted as (N, M). Common configurations are (4,2), (6,2), (12,3), etc.

[0004] Data Rebalance: refers to the data redistribution process caused by the increase or decrease of storage nodes or hard disks in...

Claims

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