NFS locks allow a process to have exclusive access to all or part of a file. File locking is implemented both on the server and the client. When a file is locked, the buffer cache is not used for that file, and each write request is immediately sent to the server.
After a system failure, when the server is restarted, the server attempts to restore the file lock status to the previous condition. If the client fails, the server releases the file lock. However, after the client restarts it has a short period of time to reclaim the file lock.
To manage NFS locks
Note NFS is available only if Microsoft Windows Services for UNIX Server for NFS is installed on this server. If NFS is not available on this server, this procedure is not applicable.
NFS Client Groups
User and Group Mappings