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A method to improve disk performance by compressing disk onboard cache

A disk and cache technology, applied in the field of disk internal cache management, to achieve the effect of improving hit rate, reducing mechanical access behavior, and avoiding negative effects

Active Publication Date: 2019-12-24
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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  • A method to improve disk performance by compressing disk onboard cache
  • A method to improve disk performance by compressing disk onboard cache
  • A method to improve disk performance by compressing disk onboard cache

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Embodiment Construction

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

[0026] Such as figure 1 As shown, the method for improving disk performance by compressing the onboard cache of the disk 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 to reduce access to low-speed disks. Disk probability, and then achieve the purpose of improving disk performance. Wherein the controller component is used to manage the data passing through the cache component and dynamically compress the data stored in the cache, and the cache component after adopting the compression mechanism will be able to store more data, thereby improving the hit rate and reducing the access to the permanent storage medium Probability, all the data circulation with the outside world and internal data storage in the disk are managed by this part, and the controller part will inte...

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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 for their advantages of high capacity, low cost, and relatively fast reading and writing. With the improvement of the production process of magnetic components and the reduction of the cost of storage media, the price per bit of disk will continue to decrease, and will continue to dominate the storage market for a period of time in the future. However, some of its key performance indicators have not had a breakthrough improvement 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 so far. [0003] The random read and write speed bottleneck of...

Claims

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Application Information

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