Metadata service system metadata synchronized method and writing server updating method

Abstract

The invention discloses a metadata service system metadata synchronized method and writing server updating method. The metadata service system provided by the invention includes a writing server and a reading server; the writing server is used for storing the metadata in a concurrent file system to receive reading access and receive writing access; correcting the metadata in the concurrent file system and synchronously updating the corrected metadata into the reading server; the reading server is used for storing the metadata and receiving reading access, receiving the synchronous updating of the writing server to the metadata, and is also used for converting into writing service when the write server is monitored to be valid. The invention solves the problem of single point failure through the mutual backup of the reading server and the writing server, and can meet high effective large-scale concurrent access demands.

Description

technical field [0001] The invention relates to distributed storage in cluster computing, in particular to a metadata service system for storing, modifying and reading metadata in a parallel file system, a method for synchronizing metadata and a method for updating a write server. Background technique [0002] A file system is a subsystem used for data storage and reading in a computer system, and is generally built on a disk. In network application scenarios, computing and storage are often separated, that is, distributed file systems are accessed through the network. For high-performance computing and high-load network service applications that use a large number of computers to work in parallel, it is often necessary to use multiple servers dedicated to storage to jointly provide file system services to meet access bandwidth requirements. [0003] A commonly used high-performance parallel file system architecture is to store the "metadata" such as the index information o...

AI Technical Summary

Problems solved by technology

[0008] 1. The existing parallel file system that provides metadata services by a single server does not have high availability, and the failure of the metadata server will cause the entire file system to be unavailable

[0009] 2. Using shared storage devices to form a metadata server with a master-standby structure will lose state data when a switchover occurs

Moreover, only one server provides services at the same time, and it is difficult to provide sufficient load capacity when facing a large number of concurrent accesses

[0010] 3. Multi-node distributed storage of metadata, that is, the way of providing multiple metadata server services by querying information each other will affect the efficiency of access and increase the delay of access

At the same time, it does not solve the synchronization problem of state data

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