|RPC.STATD(8)||System Manager's Manual||RPC.STATD(8)|
rpc.statdis a daemon which co-operates with rpc.statd daemons on other hosts to provide a status monitoring service. The daemon accepts requests from programs running on the local host (typically, rpc.lockd(8), the NFS file locking daemon) to monitor the status of specified hosts. If a monitored host crashes and restarts, the remote daemon will notify the local daemon, which in turn will notify the local program(s) which requested the monitoring service. Conversely if this host crashes and restarts when
rpc.statdrestarts, it will notify all of the hosts which were being monitored at the time of the crash.
The options available are:
LOG_DAEMON. Error conditions are logged irrespective of this option, using level
rpc.statd daemon must NOT be invoked
by inetd(8) because the protocol assumes
that the daemon will run from system start time. Instead, it should be
configured in rc.conf(8) to run at
rpc.statdappeared in SunOS 4. The current implementation was ported from NetBSD to OpenBSD 4.4.
The protocol requires that symmetric monitor requests are made to both the local and remote daemon in order to establish a monitored relationship. This is convenient for the NFS locking protocol, but probably reduces the usefulness of the monitoring system for other applications.
The current implementation uses more than 1Kbyte per monitored host in the status file (and also in VM). This may be inefficient for NFS servers with large numbers of clients.
|October 17, 2017||OpenBSD-current|