NSRD(8)NSRD(8)NAMEnsrd - daemon providing the NetWorker service
SYNOPSISnsrd [ -k virtual-service-name ]
ansrd [ commentary ]
The nsrd daemon provides an RPC-based save and recover service. This
service allows users to save, query for, and recover their files across
a network. The RPC program number provided by nsrd is 390103.
Normally nsrd is invoked from a startup shell script (for example
rc.local, rc.boot) at boot-time, and should never need to be started
directly by a user. After it is started, nsrd starts up the other dae‐
mons it needs to provide the NetWorker service.
The nsrd command must be run on a machine with appropriate resources.
These resources include devices (for example, tape drives) which are
under the control of the media multiplexor software (see nsrmmd(8)),
and sufficient disk space for the index daemons, (see nsrindexd(8) and
nsrmmdbd(8)) to maintain the index of saved user files and volumes with
Each time a backup, recover, or another session begins, nsrd starts the
program, ansrd, to process the requested session. The ansrd program is
called an agent. The agent is in charge of monitoring that backup,
recover, or another session, and automatically exits when a session
completes. Using ps(1) or another process monitoring tool, you can
inspect the subsequent parameters of ansrd to see what kind of session
it is monitoring. If necessary, agents can be forcibly terminated to
abort a backup or recover session. Agents cannot be run directly; they
can only be started by nsrd.
When nsrd is started with the -k option, it checks to see whether it
has been installed as a cluster service and that the virtual host which
owns /nsr/res matches virtual-service-name. If either of these valida‐
tion steps fails, nsrd exits immediately. (To check whether NetWorker
has been installed as a cluster service, nsrd checks for a file called
NetWorker.clustersvr in the directory containing the nsrd binary. To
check that /nsr/res is owned by virtual-service-name, nsrd queries the
cluster management software.)
If the -k option is not used when starting NetWorker in a cluster, the
server assumes the identity of the virtual host which owns /nsr/res.
If no virtual host owns /nsr/res, then nsrd will not start.
Instructs nsrd to start up in cluster failover mode using vir‐
tual-service-name as its hostname/identity. This option is used
by the NetWorker cluster control script which starts NetWorker.
The file to which nsrd and other NetWorker daemons send
information about various error conditions that cannot other‐
wise be logged using the NetWorker event mechanism.
Information describing the NetWorker service and its
resources (See nsr_service(5)).
If this file exists in the directory containing NetWorker's
daemons, it indicates that the NetWorker server has been
installed as a cluster service.
SEE ALSOnsr(8), nsr_service(5), nsrmmd(8), nsrmmdbd(8), nsrindexd(8), ps(1),
NetWorker 7.3.2 Aug 23, 06 NSRD(8)