A workaround for missing file system sessions

Abstract

The invention discloses a solution to the lack of file system session, which relates to the field of storage file system, by reconstructing the mechanism of establishing and maintaining a session between a client and a server; when the client mounts, it establishes with each server in use Session connection; when a node on the server fails to connect, the monitoring node notifies the client of the node failure, and the client removes the connection to the server; when a new node is added to the server, the monitoring node notifies the client of the newly added node information , the client establishes a session connection with the newly joined server node. The present invention solves the problem that the entire file system is unusable due to the failure of the server end to cause the session to be lost, and the backup node cannot be replaced normally; it ensures the normal use of the entire cluster, improves the continuous support for user services, and can significantly improve product quality. reliability.

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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