Data storage method and storage server

Abstract

An embodiment of the invention discloses a data storage method and a storage server. The method includes detecting actual hard disc usage corresponding to the initial capacity level in configured hard disc capacity level; when the hard disc corresponding to the initial capacity level is determined to be excessive according to detected actual usage, querying a hard disc corresponding to a secondary high capacity level higher than the initial capacity level in the configured hard disc capacity level; when the hard disc corresponding to the secondary high capacity level is found out, determining migration proportion of virtual nodes carrying stored data according to the initial capacity level, the secondary high capacity level and the actual hard disc usage, and performing virtual node migration between hard discs corresponding to the configured hard disc capacity level according to the migration proportion. The hard disc capacity level is divided according to actual hard disc capacity. By the aid of the method, hard disc capacity isomerism in massive storage can be supported.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a data storage method and a storage server. Background technique [0002] Most of the massive distributed storage systems use objects as the basic storage form. Objects are a collection of data and self-describing information, and are the basic unit of data storage on disk. Consistent hashing algorithms are usually used to realize the decentralized distribution of these objects. Although the consistent hash algorithm guarantees the balance, decentralization, fault tolerance, and scalability of the system data storage, the consistent hash algorithm does not guarantee absolute balance, especially in the case of fewer physical nodes. It cannot be evenly mapped to each node. In order to solve this situation, the consistent hashing algorithm introduces the concept of virtual nodes. Virtual nodes are replicas of physical nodes in the ring space. One physical node corresponds to several vir...

AI Technical Summary

Problems solved by technology

[0004] With the continuous development of hard disk technology, the capacity of a single disk has been continuously improved. Mass storage systems will inevitably face the problem of heterogeneous hard disk capacity when expanding capacity and replacing components. However, existing storage solutions cannot support mass storage. The capacity of the hard disk is heterogeneous, which reduces the user experience of the product

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