A method, device, equipment, and readable storage medium for determining the master of a storage pool PG

Abstract

The invention discloses a storage pool PG master determination method. The method comprises: counting PG master distribution conditions of OSDs in a storage pool; judging whether the PG main distribution reaches a preset uniform distribution standard or not according to the PG main distribution statistical data; if the PG main distribution does not reach the preset uniform distribution standard, obtaining pre-configured PG main weight data corresponding to the current storage pool; performing weight adjustment on the PG master weight data according to a uniform distribution standard; and determining a PG master according to the remodulation PG master weight data. According to the method, a corresponding OSD is allocated to each storage pool to serve as a main weight value of a PG; targetedadjustment of different PG main distribution conditions between different storage pools is achieved, it is guaranteed that each storage pool can determine the PG main in the most balanced mode underthe condition of different PG main distribution, and the storage balance of the overall distributed storage system is improved. The invention further discloses a storage pool PG master determination device and equipment and a readable storage medium which have the above beneficial effects.

Description

technical field [0001] The present invention relates to the technical field of distributed data storage, in particular to a storage pool PG master determination method, device, equipment and a readable storage medium. Background technique [0002] In order to facilitate the management of data distribution, the system will first create a storage pool, and then the storage pool will be divided into multiple PGs (Placement Group, placement group, a virtual logical unit of data distribution), and each PG contains Several hard drives. For example, the 4+2 erasure rule needs to save 6 pieces of data, and 6 hard disks are needed to save the data, then each PG contains 6 hard disks, and each hard disk is used as the OSD (Object Storage Device, Object Storage Device) of the PG. [0003] At the same time, there is a main OSD in each PG. The front-end writing business first sends the data to the main OSD, and then performs erasure correction and fragmentation calculations and sends it...

AI Technical Summary

Problems solved by technology

However, in a general system, multiple storage pools are created, and all OSDs and corresponding weights are shared between multiple storage pools. The weight adjusted according to the traditional method is only applicable to a single storage pool, and the overall distribution of the main OSDs among the storage pools is still uneven. , leading to the unbalanced overall capacity of the distributed file system, and the low efficiency of reading and writing data in the cache media space

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