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A differential data backup method and a differential data backup device

A differential data and backup technology, applied in the storage field, can solve the problems of data inconsistency and affect the data processing efficiency of the production array, and achieve the effect of improving efficiency and ensuring data consistency.

Active Publication Date: 2020-10-09
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in order to ensure the data consistency between the production array and the disaster recovery array, the production array needs to suspend the write data request before creating the snapshot, so as to prevent the changed data from not being recorded in the snapshot, resulting in the data in the production array being inconsistent with the disaster recovery Inconsistent data in the array
However, pending write data requests often affect the efficiency of data processing in production arrays

Method used

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  • A differential data backup method and a differential data backup device
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  • A differential data backup method and a differential data backup device

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Embodiment Construction

[0025] Embodiments of the present invention provide a data backup method and a storage system, which can avoid pending data write requests, thereby improving the efficiency of data processing.

[0026] The application scenarios of the embodiments of the present invention are introduced below.

[0027] Such as figure 1 as shown, figure 1 A composition diagram of the storage system 10 provided by the embodiment of the present invention is depicted, figure 1 The illustrated storage system 10 includes one or more hosts 40 and a storage device 20 . The host can be a computing device, such as a terminal device such as a server and a desktop computer. The storage device 20 may be a storage device based on block data, such as a storage area network (Storage Area Networking, SAN) device, or a storage device including a file system, such as a network attached storage (Network Attached Storage, NAS) device. This embodiment does not impose any limitation on the type of the storage dev...

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Abstract

Disclosed are a differential data backup method, a differential data backup device and a storage system. The storage system comprises a processor, a production volume and a target volume. The processor acquires a record of differential data between two numbers, wherein the numbers are used to mark a period in which data is written to the production volume. A first number of the two numbers is a number allocated to data most recently received by the production volume before creating a first snapshot of the production volume; a second number of the two numbers is a number allocated to data most recently received by the production volume after creating a second snapshot of the production volume. The record of differential data comprises logical addresses of the differential data received in the periods marked by all numbers between the two numbers. The processor acquires backup data from the second snapshot according to the record of differential data and sends the backup data to the target volume. The present invention can prevent a data-writing request from being suspended, thus increasing the efficiency of data processing in the storage system.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of storage, in particular, a differential data backup method and a differential data backup device. Background technique [0002] A typical data disaster recovery system includes a production center and a disaster recovery center. In the production center, hosts and storage arrays are deployed for normal business operation; in the disaster recovery center, hosts and storage arrays are deployed for taking over the business after a disaster occurs in the production center. Wherein, the storage array of the production center or the disaster recovery center includes multiple data volumes, and the data volume is a segment of logical storage space mapped from the physical storage space. After the data generated by the business of the production center is written into the production array, it can be backed up to the disaster recovery center through the disaster recovery link and written i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14
CPCG06F11/1448G06F11/1469
Inventor 廖基祥欧阳戟
Owner HUAWEI TECH CO LTD
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