Method and device for matching space allocation with brushing

Abstract

An embodiment of the invention discloses a method and a device for matching space allocation with brushing. Space allocation of a file system can be matched with brushing of a Cache, so that the writing performance of the file system is improved. The method includes the steps: receiving a writing IO (input / output) request; determining the size of writing IO according to the writing IO request; allocating at least one logic block matched with the size of the writing IO according to a preset logic block allocation queue; writing data of the IO request into the high-speed Cache according to information of at least one logic block; brushing data in each logic block according to a preset logic block brushing queue.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method and device for space allocation and cooperation of brush disks. Background technique [0002] A file system is a system for storing and organizing user data. The file system provides users with simple and convenient data access. The file system uses the abstract concepts of files and directories to replace the concept of data blocks in storage media such as disks, so that users do not need to care about the storage location of data on the storage media, and only access their data by accessing directories or files. The file system maintains the layout of user data on storage media, that is, manages the distribution and location of file data on storage media. With the growth of the file system life cycle, file data will be continuously added, deleted, modified, and searched. Unreasonable space allocation strategies will lead to more and more fragmentation of free areas on storage...

AI Technical Summary

Problems solved by technology

[0004] The space allocation module of the existing file system is allocated according to the way of using complete data logical blocks first. In the random overwrite scenario, after a large number of disks are generated, it is often impossible to find logical blocks with full stripes, resulting in poor write performance.

In addition, the space allocation and Cache of the existing file system are isolated, and there is no cooperation between them. As a result, when each executes according to its own strategy, a large number of repeated write IOs will be generated, that is, the number of flashes will be increased. further degrades write performance

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