Metadata Restoration Method and Device

Abstract

The invention discloses a restoring method of meta data and a device. The restoring method includes that produced business of a meta data server is stored when the meta data server is in the abnormal period and a file identification corresponding to each business is stored. The meta data are produced according to the business corresponding to the same file identification by the stored business after the abnormality of the data server is removed. The produced meta data are delivered to the meta data serve. According to the restoring method of meta data and the device, business produced by the meta data server in the abnormality period and the corresponding file identification are stored. Due to the fact that the meta data produced by the corresponding business of the same file identification can be transmitted, the transmitting way can aim at the fact that the meta data are transmitted parallely by a plurality of files, thus restoring efficiency of the meta data is effectively improved. A plurality of meta data servers are restored uniformly in a short time as soon as possible. Reliability of the system is improved. A large amount of time occupied by the recovering of the server is avoided. The regular conduction of the business of a user is guaranteed as far as possible.

Description

technical field [0001] The present invention relates to the communication field, and in particular, relates to a metadata recovery method and device. Background technique [0002] In order to ensure the accuracy of the metadata in the distributed file system, metadata is usually stored in multiple metadata servers. When one of the metadata servers fails, the other normal metadata servers Metadata is available to the distributed file system. When the abnormal metadata server returns to normal, how to restore the data on two or more metadata servers to be consistent is a difficult and hot issue in the current distributed file system. [0003] Since the nodes in the distributed system (that is, the metadata server) are independent of each other, failures may occur at any time, and the consistency of metadata involves multiple parts, including in the cache, in the disk cache, and stored on the disk. several parts. In order to ensure the consistency of multiple pieces of metad...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem in the related art that the data of multiple metadata servers is difficult to restore to be consistent, resulting in a decrease in system reliability, the present invention proposes a method and device for restoring metadata, which can effectively improve the efficiency of metadata restoration and ensure that users business can be carried on normally

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