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LUN data replication method and device

A data replication and data technology, applied in the storage field, can solve the problems of newly written source LUN data loss, lost data, etc., to achieve high space utilization and reduce the risk of data loss

Pending Publication Date: 2022-01-28
MACROSAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] If the source LUN fails during use, the target LUN only saves the data in the source LUN at the start of the last replication, resulting in the loss of data newly written to the source LUN since the last replication
And the longer the replication period, the more data will be lost

Method used

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  • LUN data replication method and device
  • LUN data replication method and device
  • LUN data replication method and device

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Embodiment Construction

[0070] 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.

[0071] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the a...

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Abstract

The invention provides an LUN data replication method and device which are applied to storage equipment. A source LUN included in the storage equipment corresponds to a buffer area, the buffer area is used for storing a data record of to-be-copied data in the source LUN and part of the to-be-copied data, and the data record comprises a corresponding logic address field of the to-be-copied data in the source LUN and a storage position of the to-be-copied data in the buffer area. For each data record in the buffer area, if the storage position included in the data record is empty, indicating that the data to be copied corresponding to the data record is located in the source LUN, and copying the corresponding data from the source LUN to a target LUN; and if the storage position included in the data record is not empty, it is indicated that the to-be-copied data corresponding to the data record is located in the buffer area, and the corresponding data is copied to the target LUN from the buffer area. According to the method and the device, data loss under abnormal conditions can be effectively reduced, and the utilization rate of the buffer area can be effectively improved.

Description

technical field [0001] The present application relates to the field of storage technologies, and in particular to a method and device for duplicating LUN data. Background technique [0002] Storage devices generally have data protection features, and data replication, as a technology that can realize data protection, has been widely used in storage devices. [0003] At present, for the data replication of Logical Unit Number (English: Logical Unit Number, abbreviation: LUN) in the storage device, the periodic replication method is mainly adopted, that is, every preset replication cycle (for example, 1 hour) will copy the new data in the source LUN The written data is copied to the target LUN. Here, the LUN to be copied in the storage device is called a source LUN; the LUN used for backing up (copying) data in the source LUN is called a target LUN. [0004] If the source LUN fails during use, the target LUN only saves the data in the source LUN at the start of the last repl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0614G06F3/065G06F3/0656G06F3/0673
Inventor 上官应兰
Owner MACROSAN TECH