Method and device for synchronizing increments among different copies
A technology of incremental synchronization and copying, which is applied to the generation of response errors, error detection of redundant data in calculations, and instruments. It can solve the problems of long time to find common records and low efficiency of incremental synchronization. Achieve the effect of shortening the duration and improving the efficiency of incremental synchronization
Active Publication Date: 2019-10-18
华云工业互联网有限公司
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Problems solved by technology
However, if the log device has a lot of content, it will take a long time to find common records, resulting in low efficiency of incremental synchronization between different replicas
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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0042] This embodiment discloses a method for incremental synchronization between different replicas, which is applied to a distributed storage management system. Please refer to figure 2 , the incremental synchronization method between different replicas disclosed in this embodiment specifically includes the following steps:
[0043] S101: After detecting that the faulty device is restored, determine the target logical disk to be restored;
[0044] When the...
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The invention provides a method and a device for synchronizing increments among different copies. The method comprises steps of generating snapshots for the available copies of each logic disk, when the logic disk corresponding to the recovered equipment needs to be recovered, determining a latest common snapshot and a current latest snapshot between different copies of a logic disk; determining first incremental data between the latest common snapshot and the current latest snapshot, on the basis, determining the second incremental data between the current latest write operation and the current latest snapshot in the log device of any available copy of the logic disk quickly, and writing the first incremental data and the second incremental data into the recovered device to complete incremental synchronization between different copies. Due to the fact that the latest common snapshot and the current latest snapshot between different copies of the logic disk do not need to traverse allrecords in the log device, the duration for determining incremental data between different copies can be effectively shortened, and the incremental synchronization efficiency between different copiesis improved.
Description
technical field [0001] The present invention relates to the technical field of data storage, and more specifically, to a method and device for incremental synchronization between different copies. Background technique [0002] In order to improve the utilization and reliability of storage resources, cloud computing providers and storage providers usually virtualize multiple physical storage devices into a single or a few storage pools, and then create logical disks from these storage pools and divide them into virtual computers or Physical computer use. Such as figure 1 As shown in the figure, three physical hard disks form a storage pool, and the storage management software divides logical disks in the storage pool. Logical disks are assigned to virtual machines for use. [0003] In order to avoid system unavailability caused by a single point of failure, multiple copies are set for each logical disk. These copies will be distributed on different physical hard disk devic...
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IPC IPC(8): H04L29/08G06F11/14
CPCH04L67/1095H04L67/1097G06F11/1464G06F11/1469
Inventor 刘庆张欢
Owner 华云工业互联网有限公司