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Method, device, and system for writing data

A technology for writing data and data, which is applied in the IT field and can solve problems such as large delays

Active Publication Date: 2014-05-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach can reduce RTO to a certain extent, but in its processing flow, multiple information interactions between controllers are required, and the time delay is still relatively large.

Method used

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  • Method, device, and system for writing data
  • Method, device, and system for writing data
  • Method, device, and system for writing data

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Embodiment Construction

[0016] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained based on the embodiments of the present invention belong to the protection scope of the present invention.

[0017] as attached figure 1 In the embodiment of the present invention, an active-active (AA, Active-Active) storage system is composed of a storage array 13 and a storage array 14. Some servers 11 are connected to the storage array 13 through a network 12, and another part of servers 11 are connected to the storage array 13 through a network 12. The storage array 14 is connected. The storage array 13 and the storage array 14 are communicatively connected to form the storage system 1 together.

[0018] The two storage arrays communicate through data ...

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PUM

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Abstract

The invention provides a data writing technology. A first controller receives a first write request, which comprises a fist data, a first write address, and an LUN ID; the first controller requests to lock the write permission of the first write address in the LUN; after the first controller obtains the write permission of the first write address, the first controller writes the first data into the first controller according to the first write request and sends a first write sub-request to a second controller, wherein the first write sub-request carries the same content as that of the first write request; and after the first controller finishes writing the first data in the first controller and receives the response message that the first write sub-request is successfully written, the first controller releases the locked write permission of the first write address.

Description

technical field [0001] The present invention relates to the field of IT, in particular to a storage technology. Background technique [0002] The traditional disaster recovery data center or two-site three-center (3Data Center, 3DC) can back up data from the local production center to the remote disaster recovery center through the remote replication technology of the storage array to ensure data security. However, if the production center is down, it will take a long time, such as several hours, to start the disaster recovery center, which means that the recovery time objectives (RTO) of this technology are relatively long. [0003] In one solution, two data centers are deployed, and each data center has a controller. One controller acts as the master controller and the other acts as the slave controller. When the slave controller receives a read and write request, it forwards the request to the master controller for processing. This method can reduce the RTO to a certai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/16
CPCG06F3/0619G06F3/0622G06F3/065G06F3/067G06F11/1471
Inventor 蒋培军李小华
Owner HUAWEI TECH CO LTD
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