A Prefetching Method for Object File System

Abstract

The invention discloses a pre-fetch method of an object file system. The method comprises the steps of initializing data structures and variables of the object file system, judging whether a server receives an object reading request from a client, analyzing the object reading request if the server receives the object reading request, determining a current object and an Oid of the current object according to the object reading request, judging whether object reading request hits a cache, judging whether a timing value greater than or equal to a time threshold valve T_MAX exists if the object reading request does not hit the cache, inquiring a pre-fetch attribute table according to the Oid of the current object if the timing value does not exist, obtaining a pre-fetch attribute of the current object, executing disk reading and pre-fetch operation according to the pre-fetch attribute, modifying single-step pre-fetch information of the pre-fetch attribute table according to an overall access order array, and modifying multi-step pre-fetch information of the pre-fetch attribute table according to the overall access order array. The pre-fetch method achieves self-adaption regulation of a pre-fetch range, a pre-fetch accuracy rate is kept close to the set threshold valve, single-step pre-fetch and multi-step pre-fetch are considered, and source occupancy is controllable.

Description

technical field [0001] The invention belongs to the technical field of prefetching, and more specifically relates to a prefetching method of an object file system. Background technique [0002] The development of information technology has brought about an ever-increasing mass of data, a rapid increase in storage requirements, and increasingly complex storage applications. The traditional storage system based on the block interface is difficult to meet the requirements of security, cross-platform data sharing, high performance and scalability. Therefore, an object-based interface has emerged. Object-based storage provides , cross-platform and secure data sharing storage architecture, which has excellent performance in the application scenarios of massive data. [0003] However, the performance improvement speed of the storage device lags far behind the increase speed of the storage density, so the object file system inevitably encounters the problem of I / O bottleneck. In t...

AI Technical Summary

Problems solved by technology

Obviously, if the subsequent multi-step access sequence can be predicted, the system performance can be better improved, but this requires a larger amount of data records and the analysis of their internal associations

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