Disk data management method and disk control device

Abstract

The embodiment of the invention discloses a disk data management method and a disk control device, which are used for efficiently managing a fragment on a disk. The disk data management method disclosed by the embodiment of the invention is applied to the disk control device that comprises a disk, wherein the disk comprises a data area and a log area. The method comprises the following steps: writing data in a buffer memory; judging whether the data is hot spot data, wherein the hot spot data, after stored in the disk, is the data that can make the disk generate fragments of which the number is preset after the preset number of times is amended and released; if the data is not the hot spot data, then allocating a data area space for the data in the data area, and writing the data into the data area space; if the data is hot spot data, then allocating a log area space for the data in the log area, and writing the data into the log area space. By storing different types of data at different areas in the disk and managing in different ways, the efficiency for managing the fragment on the disk can be improved, and the high-efficiency management for the disk fragment in the log area can reduce the generation of the disk fragment.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a disk data management method and a disk control device. Background technique [0002] For ordinary mechanical hard disks, because they rely on mechanically rotating disks and moving magnetic heads to position the reading and writing positions, sequential reading and writing of hard disks is the most ideal reading and writing model. If the disk space is fragmented, continuous space cannot be allocated when writing data, resulting in severe head jitter. The main time of data transmission is spent on positioning tracks and sectors, leaving little time for data transmission. Because the data of the file is relatively discrete, the efficiency of reading these files is also low. [0003] Therefore, most disk file systems are trying their best to avoid creating a large amount of fragmented space, but fragmentation is still unavoidable. [0004] For example, using the COW mechanism can ...

AI Technical Summary

Problems solved by technology

This will release a lot of data, resulting in a lot of fragmentation on the disk

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