File access method and device

Abstract

The invention discloses a file access method and device.The method comprises the steps that a file system is determined in a network division state, the file system operates on a plurality of hosts, the network partition state indicates the file system to be divided into at least two zones, and networks between the two zones are not communicated; the access request of a first file is received; a first host identification corresponding to the access request is acquired; the first host identification is determined to be consistent with a second host identification configured for the first file in the file system, and the first file is accessed.According to the file access method and device, the reliability for accessing the cluster file system when the networks are divided can be improved.

Description

technical field [0001] The present invention relates to the field of information technology, and more particularly, to a method and device for accessing files. Background technique [0002] Multiple hosts in a cluster file system or distributed file system are connected together through a switch to form an interoperable network. Multiple hosts access shared resources in a mutually exclusive access mode, for example, multiple hosts simultaneously write A file, at this time, use distributed locks to ensure mutual exclusion. Only when a host finishes writing, release the lock, and other hosts can continue to write. However, if there is a host network card failure or a switch port failure, a network failure or a software failure, it may cause the cluster file system to be divided into two or more subnetworks. The networks in the subnetworks are interconnected, but in each divided network are not interoperable. [0003] In the prior art, when the network partition occurs in th...

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Problems solved by technology

However, if there is a host network card failure or a switch port failure, a network failure or a software failure, it may cause the cluster file system to be divided into two or more subnetworks. The networks in the subnetworks are interconnected, but in each divided network are not interoperable

[0003] In the prior art, when the network partition occurs in the cluster file system, in order to ensure that the cluster file system does not hang, some servers must be removed from the cluster file system, then the applications on the hosts removed from the cluster file system cannot access the cluster file system, resulting in business interruption. In order to ensure business continuity, the virtual machine can only be shut down and then started on other hosts. Therefore, when the network is divided, the reliability of accessing the cluster file system is reduced.

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