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Method for improving disk performance by compressing disk on-board cache

A disk and cache technology, applied in the field of disk internal cache management, to reduce system overhead, improve cost performance, and avoid negative effects

Active Publication Date: 2016-03-30
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current hard disk cache in the market is 8M to 128M, which is still quite limited compared to the current magnetic storage capacity of 1TB or more

Method used

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  • Method for improving disk performance by compressing disk on-board cache
  • Method for improving disk performance by compressing disk on-board cache
  • Method for improving disk performance by compressing disk on-board cache

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific embodiments.

[0026] Such as figure 1 As shown, the method of compressing the disk onboard cache to improve disk performance described in this embodiment mainly uses the controller components and cache components on the disk to increase the hit rate of the onboard cache on the disk, so as to reduce access to low-speed disks. The probability of the disk, and then achieve the purpose of improving the performance of the disk. The controller component is used to manage the data passing through the cache component and dynamically compress the data stored in the cache. The cache component after the compression mechanism can store more data, thereby increasing the hit rate and reducing the access to permanent storage media Probability, all data circulation and internal data storage in the disk are managed by this component. The controller component will integrate the commonly used binary data comp...

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Abstract

The present invention discloses a method for improving disk performance by compressing a disk on-board cache. When an external read request arrives, a controller component can compress requested data stored in a cache and compress subsequently prefetched data. The compressed cache can store more data to improve a hit rate, so that a subsequent request can be quickly responded to. When an external write request arrives, a compression mechanism can enable a cache to store more write request data, so as to reduce a probability of write-back of cached data. The compression mechanism can be dynamically adjusted or disabled so as to reduce instability. According to the method for improving disk performance by compressing a disk on-board cache provided by the present invention, a hit rate of a on-board cache on a disk can be increased to reduce a probability of assessing a low-speed disk platter, so as to improve disk performance; in addition, the reduction in access frequency of a disk platter can also reduce switching frequency of a power state and start-up frequency of the disk platter, so that energy can be saved and a service life can be extended.

Description

Technical field [0001] The invention relates to the technical field of disk internal cache management, in particular to a method for improving disk performance by compressing disk onboard cache. Background technique [0002] In modern storage systems, disks are widely used due to the advantages of high capacity, low price ratio, and relatively fast read and write. With the improvement of the production process of magnetic components and the reduction of the cost of storage media, the price per bit of the magnetic disk will continue to decrease and will continue to dominate the storage market for a period of time. However, some of its key performance indicators have not been improved for a long time, such as random read and write performance. In 2000, the performance gap between main memory and hard disk was already exponential to the 6th power, and this gap has been increasing rapidly every year. [0003] The random read and write speed bottleneck of the disk is determined by its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0616G06F3/0656
Inventor 邓玉辉江文
Owner JINAN UNIVERSITY
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