Data recovery method and device
A recovery method and data technology, which is applied in the field of electronic information, can solve the problems of long time, affecting the normal operation of the system, and the long time for the local system to restore data access, so as to achieve the effect of restoring data access in a short time and improving operability
Active Publication Date: 2021-07-23
HUAWEI TECH CO LTD
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Problems solved by technology
Due to the large amount of data in the full user data snapshot and metadata snapshot, it will take a long time to copy the full user data snapshot and metadata snapshot from the remote backup server to the local system when the bandwidth or copy speed is limited, resulting in It takes a long time for the local system to restore data access, which affects the normal operation of the system
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Embodiment Construction
[0048] The embodiment of the present application provides a data recovery method and its device, which are used to restore data access by copying the metadata copy of the backup device when data access occurs when data is damaged or lost, without copying the full amount User data copy saves time and improves system operability.
[0049] see figure 1 , the data storage system in the embodiment of this application includes:
[0050] figure 1 The data storage system shown includes at least two data centers. For the convenience of description, in the embodiment of this application, the figure 1 The two data centers shown are referred to as the production facility and the backup facility. Data transmission can be performed between the two data centers through an Internet protocol address (IP, internet protocol) or a fiber channel (FC, Fiber Chanel). In the embodiment of the present application, a host may be further included, and the host may be configured with a client, and t...
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The embodiment of the invention discloses a data recovery method which can be used in a storage system and comprises the steps that when metadata of a file system in production equipment is damaged, a metadata copy is obtained from backup equipment, and the metadata is used for recording the address of user data; the production equipment receives a first data reading request sent by the client, the first data reading request is used for reading first user data, and the first user data stored in the production equipment is damaged; the production equipment queries in the metadata copy to obtain address information of the first user data, wherein the address of the first user data points to the backup equipment; the production equipment obtains the first user data from the backup equipment; and the production equipment sends the first user data to the client. According to the embodiment of the invention, the data access recovery time can be shortened, so that the operability of the system is improved.
Description
technical field [0001] The embodiment of the present application relates to the field of electronic information technology, and specifically relates to a data recovery method and equipment thereof. Background technique [0002] In the digital age, data is the core asset of society, organizations and individuals, and the protection of data assets is related to the core interests of organizations and individuals. Backing up data to protect data assets is currently the most commonly used method. When system data is lost due to natural disasters, viruses, and man-made damage, the backup data recovery service can be used to restore the lost data. [0003] Usually, the backup system will build a remote backup system, and the remote backup system realizes backup by backing up user data snapshots and metadata snapshots. [0004] When data is damaged or lost, and there is a business need to access the data, it is necessary to copy the full user data snapshot and metadata snapshot fr...
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IPC IPC(8): G06F11/14
CPCG06F11/1448G06F11/1464
Inventor 杨幸坤威普瑞·拉玛苏布拉玛尼亚姆
Owner HUAWEI TECH CO LTD