File system session missing solution

Abstract

The invention discloses a file system session missing solution and relates to the field of storage file systems. A mechanism of a session is established and kept by reconstituting a client side and a server side; when clients is mounted, session connection with each currently-used server is established; when a node of one server breaks down and the server cannot be connected, the node failure is informed by a monitoring node to the client side, and the client side eliminates connection with the server; when a new node is added to the server side, the monitoring node informs the client side of information of the newly added node, and the client side establishes session connection with the newly added node of the server side. The problems that the server side breaks down, session missing occurs, a standby node cannot conduct normal replacement, and consequently a whole file system is unusable are solved; normal use of a whole cluster is guaranteed, continuous support to user service is improved, and product reliability can be remarkably improved.

Description

technical field [0001] The invention relates to the field of storage file systems, in particular to a solution to file system session loss. Background technique [0002] In some file systems, the newly mounted client will only establish a session connection with a server-side metadata node that the file system is using. When the client has data interaction with the directory under the jurisdiction of other metadata nodes, it will establish a session connection with the corresponding metadata node. If the client has not established a complete connection with other metadata nodes, the server where the only metadata node is connected is disconnected due to device exceptions and file system connections, which will directly lead to the loss of the session between the client and the server. However, due to a server failure, the file system will automatically trigger the failure recovery process. At this time, the lack of client session information on the server side will directly...

AI Technical Summary

Problems solved by technology

If the client has not established a complete connection with other metadata nodes, the server where the only metadata node is connected is disconnected due to device exceptions and file system connections, which will directly lead to the loss of client and server sessions.

However, due to a server failure, the file system will automatically trigger the failure recovery process. At this time, the lack of client session information on the server side will directly cause the failure of the file system failure recovery, thus making the file system unavailable

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