Object caching method based on disk

Abstract

The invention relates to the technical field of disk caching, in particularly to an object caching method based on a disk. The object caching method includes the steps that file storage space is divided to construct a file storage structure of secondary indexes, and the processes of adding objects to a disk cache and acquiring and deleting cached objects from the disk cache, a cache failure mechanism and the cache optimization arrangement process are achieved according to the file storage structure of the secondary indexes. Data of the objects are stored through chunks with the fixed sizes, the multiple small objects are merged and stored in one chunk, large objects are divided into a plurality of object blocks, the object blocks are stored in the multiple chunks respectively, the objects of any size and any type can be cached, and caching efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of disk cache, in particular to a disk-based object cache method. Background technique [0002] In the process of modern software development, the use of cache plays a key role in improving system performance. Under normal circumstances, memory cache is used the most, that is, cached objects are stored in memory for fast reading. However, the storage space of the memory cache is limited. Even a distributed memory cache can provide limited memory storage space. When a large number of large objects (such as pictures, audio, video, and other large objects, etc.) It seems inappropriate, and the disk-based cache can well meet the storage needs of large objects. In a disk-based cache implementation, if each object to be cached is directly stored on the disk as a separate file, if there are a large number of cached objects, a large number of problems will occur on the disk, which will greatly reduce the read and ...

AI Technical Summary

Problems solved by technology

However, the storage space of the memory cache is limited. Even a distributed memory cache can provide limited memory storage space. When a large number of large objects (such as pictures, audio, video, and other large objects, etc.) It is not suitable, and the disk-based cache can well meet the storage needs of large objects

In a disk-based cache implementation, if each object to be cached is directly stored on the disk as a separate file, if there are a large number of cached objects, a large number of problems will occur on the disk, which will greatly reduce the read and write of the disk. efficiency

Cache objects usually have a certain life cycle and will fail according to different strategies. At this time, disk files will be frequently added and deleted, resulting in a large number of disk fragments, thereby further reducing disk read and write efficiency.

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