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Method, apparatus and computer program product for managing data

A computer program, technology for managing data, applied in the input/output process of data processing, computing, electrical digital data processing, etc.

Pending Publication Date: 2020-10-30
EMC IP HLDG CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem of how to use disks to better process data in RAID

Method used

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  • Method, apparatus and computer program product for managing data
  • Method, apparatus and computer program product for managing data
  • Method, apparatus and computer program product for managing data

Examples

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Embodiment Construction

[0015] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for exemplary purposes only, and are not intended to limit the protection scope of the present disclosure.

[0016] In the description of the embodiments of the present disclosure, the term "comprising" and its similar expressions should be interpreted as an open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be read as "at least one ...

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Abstract

Embodiments of the present disclosure provide a method, an apparatus, and a computer program product for managing data. The method comprises the steps of determining three indications relating to thestatus of the stripe, the first indication being used to indicate whether a set of disks relating to the stripe is available, the second indication being used to indicate whether the stripe is to be reconstructed, and the third indication being used to reserve a value of the first indication when the disks are unavailable; in response to detecting that a disk of the set of disks is unavailable, updating the first indication to indicate that the disk is unavailable; and in response to receiving the write operation, updating a third indication with a first value of the first indication for indicating that the dial is not available; and in response to determining that the unavailable disks are re-available within the predetermined period of time, updating the second indication with the current value of the third indication to indicate reconstruction of the slice. By means of the scheme, the number of input / output operations which need to be conducted and are related to strip reconstruction when the unavailable disks are reused can be remarkably reduced, and the data processing efficiency is improved.

Description

technical field [0001] Embodiments of the present disclosure relate to the field of data storage, and more particularly, to methods, devices and computer program products for managing data. Background technique [0002] Redundant Array of Independent Disks (RAID) is composed of multiple independent disks combined in different ways to form a disk group. From the user's point of view, the redundant array of independent disks is like a disk, but it can provide higher storage capacity than a single hard disk, and can also provide data backup. When the data in the extent is damaged, the data backup can be used to restore the damaged data, thereby protecting the security of user data. Different composition methods of disk arrays are called RAID levels (RAID Levels), such as RAID0, RAID1, RAID5, etc. [0003] With the development of RAID technology, data reading and writing are performed at the slice level of the disk rather than at the disk level. According to this technique, e...

Claims

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Application Information

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IPC IPC(8): G06F3/06
CPCG06F3/0689G06F3/0631G06F3/0644G06F3/061G06F3/0659G06F3/0617G06F3/0653G11B20/18
Inventor 康剑斌高健
Owner EMC IP HLDG CO LLC
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