File caching device, file caching method, idle space recovery method and fault recovery method

Abstract

The invention discloses a file caching device, a file caching method, an idle space recovery method and a fault recovery method. The file caching device comprises a memory and a solid state disk, wherein the solid state disk comprises storage blocks, the memory comprises management control blocks in one-to-one correspondence with the storage blocks, and each management control block comprises a first unit and a second unit; the second unit stores the address of the corresponding storage block; the cache unit is used for caching management control block links corresponding to all storage blocksof a first file to form a first file block link table, and a first unit of the management control block stores an address or an empty address of a connected next management control block; the management control blocks corresponding to all the storage blocks which do not cache data are linked to form a free block linked list, and a first unit of each management control block stores an address or an empty address of the next management control block connected with the management control block. The method can effectively improve flexibility when the cache file is placed in the disk.

Description

technical field [0001] The invention relates to the technical field of computer storage, in particular to a file cache device, file cache, idle space recovery and fault recovery method. Background technique [0002] In the object storage scenario, high-speed writing is a very important technical requirement. Commonly used mechanical hard disks have better performance for continuous writing, but poor performance for random writing. In the object storage scenario, since different small files will be aggregated and written to large files, in order to improve the writing performance of the mechanical hard disk, caching is unavoidable, and continuous writing is performed after a large amount of data is aggregated. , to achieve the highest write performance. [0003] By using a solid state drive as a cache, you can avoid the existing problem of losing data when the memory is used as a cache. When using a solid-state drive to cache small files, usually first create a super-large ...

AI Technical Summary

Problems solved by technology

[0004] When a very large file needs to be moved to disk, the first cached data in the very large file needs to be taken out and dropped into the mechanical hard disk. However, if you want to put the middle part of the very large file or any other file at any location first, it cannot be achieved. Therefore, this method of sequentially caching small files with very large files in the solid-state disk has the problem of lack of flexibility in disk operations.

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