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Method and device for ensuring data consistency

A consistent, data technology, applied in the input/output process of data processing, electrical digital data processing, instruments, etc., can solve problems such as data loss, restart, data inconsistency, etc.

Pending Publication Date: 2018-06-29
EMC IP HLDG CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the above data update process, any SP may restart or crash due to software or hardware failure, resulting in data inconsistency between multiple SP memories or between memories and storage disks
This data inconsistency problem may have a serious impact on users, such as data loss or data unavailability, etc.

Method used

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  • Method and device for ensuring data consistency
  • Method and device for ensuring data consistency

Examples

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Embodiment Construction

[0020] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0021] As used herein, the term "comprise" and its variants mean open inclusion, ie "including but not limited to". The term "or" means "and / or" unless otherwise stated. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one further embodiment". The terms "first", "second", etc. may refer to di...

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PUM

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Abstract

The embodiment of the invention relates to a method and device for ensuring the data consistency. The method comprises the steps of writing data to a first temporary buffer located in a first processor; responding to the data written into the first temporary buffer, and sending the data to a second processor to update copy of the data in the second processor; responding to receive an instruction that the second processor receives the data, and copying the data to a first work buffer of the first processor from the first temporary buffer.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the field of data storage, and specifically relate to a method and device for ensuring data consistency. Background technique [0002] In a common storage device, a system architecture in which multiple storage processors (SP, also called processing nodes) are attached to a shared storage disk is usually used to improve the computing capability and input-output (IO) throughput of the storage product. In such a storage system architecture, configuration information used to manage storage disks (for example, status information and mapping tables of redundant array of independent disks, etc.) can be cached in the memories of multiple SPs, and the configuration information is also stored on a shared storage disk. [0003] When events such as storage disk failure or disk array expansion occur, the configuration information on a certain SP may be updated. The updated configuration information can th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/0806G06F12/0866
CPCG06F12/0806G06F12/0866G06F3/0619G06F3/0656G06F3/065G06F3/0614G06F3/0689G06F11/2064G06F11/2082G06F11/1438G06F3/064G06F11/2056
Inventor 龚绍钦高健韩耕高宏坡孙蕾徐鑫磊
Owner EMC IP HLDG CO LLC