Remote file locking
With remote file locking, only one user or process can use a
file at a time.
Remote file locking allows for file locking and file sharing
by NFS clients,
and for the automatic maintenance of those locks in the event of a
client or server crash.
The following sections describe how remote file
locking works,
how to configure it for your network, and how to troubleshoot it.
Two RPC-based daemons interact to effect file locks: lockd and statd. lockd is the Network Lock Manager and statd is the Network Status Monitor. The following sections describe how they interact to lock files.