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Data storage method, apparatus and device

A data storage and data technology, applied in the direction of electrical digital data processing, data processing input/output process, instruments, etc., can solve the problems of reduced write cache utilization, unavailability of Raid, etc., to achieve the effect of improving utilization

Active Publication Date: 2016-04-27
ZHEJIANG UNIVIEW TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present application provides a data storage method, device, and equipment to solve the problems in the prior art that the entire Raid is unavailable due to a stripe error in the Raid, and the utilization rate of the write cache is reduced.

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  • Data storage method, apparatus and device
  • Data storage method, apparatus and device
  • Data storage method, apparatus and device

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Embodiment Construction

[0030] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0031] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The present invention provides a data storage method, apparatus and device. The method comprises that a cache management module receives a write command which is transmitted from an upper layer and used for writing data into a cache, wherein the cache is a cache corresponding to a redundant array of independent disks (Raid); the cache management module determines whether the write command can be issued according to stripe status of the Raid; and if the write command cannot be issued, the cache management module transmits write failure error information to the upper layer. According to the method, after the cache management module receives the write command, the cache management module determines whether the write command can be issued according to the stripe status of the Raid, and feeds back the error cache error information to the upper layer if the write command cannot be issued, and the problem that the entire Raid is disabled due to errors of a few of stripes of the Raid is avoided. Due to the fact that the cache management module determines whether the write command can be issued strictly according to the status of each stripe, the write cache corresponding to the Raid cannot be frozen and generation of a lot of disabled write cache blocks can be prevented, and use ratio of the entire write cache is increased.

Description

technical field [0001] The present application relates to the technical field of data storage, and in particular to a data storage method, device and equipment. Background technique [0002] In current general-purpose storage products, it is a common practice for a high-speed memory (Cache) management module to use a cache to improve the write performance of a redundant array of independent disks (Raid). Taking Raid5 as an example, after business data is written to the cache, if the data in the cache can form a whole stripe, the Cache management module will write the data into the Raid to improve the performance of the product. However, if an error occurs in the Raid stripe, for example, when an error occurs in a stripe of the Raid, the Raid will enter a failed (Failed) state, and at this time, the Cache management module will set the cache of the Raid to freeze (Frozen) state, causing the cache of the entire Raid to be unavailable, reducing the utilization of the Raid spac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0656G06F3/0659G06F3/0689
Inventor 余丽
Owner ZHEJIANG UNIVIEW TECH CO LTD
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