Manual page for nis_cachemgr(1M)
nis_cachemgr - NIS+ utility to cache location information about NIS+ servers
[ -i ]
[ -n ]
[ -v ]
daemon maintains a cache of the NIS+ directory objects.
The cache contains location information necessary to contact the NIS+ servers
that serve the various directories in the name space. This includes transport
addresses, information neeeded to authenticate the server, and a time to live field
which gives a hint on how long the directory object can be cached.
The cache helps to improve the performance of the clients that are traversing
the NIS+ name space. nis_cachemgr should be running on all the machines that are using NIS+. However, it is not required that the
program be running in order for NIS+
requests to be serviced.
The cache maintained by this program is shared
by all the processes which access NIS+ on that machine.
The cache is maintained in a file
that is memory mapped (see
by all the processes.
On start up,
initializes the cache from the cold start file
and preserves unexpired entries that already exist
in the cache file. Thus, the cache survives machine reboots.
program is normally started from a system startup script.
program makes NIS+ requests under the NIS+ principal name of the host
on which it runs. Before running
security credentials for the host should be added to the
table in the host's domain using
Credentials of type
will be needed if the NIS+ service is operating at security level 2 (see
Additionally, a "keylogin -r" needs to be done on the machine.
can be used to look at the cached objects.
to ignore the previous cache file and reinitialize
the cache from just the cold start file.
By default, the cache manager initializes itself from both the cold start file
and the old cache file, thereby maintaining the entries in the cache across
mode. By default, before adding a directory object to the shared cache, on the request
of another process on the machine, it checks the encrypted signature on the request
to make sure that the directory object is a valid one and is sent by an authorized
server. In this mode,
adds the directory object to the shared cache without making
This flag sets
mode. In this mode, the
program logs not only errors and warnings,
but also additional status messages.
The additional messages are logged using
with a priority of
the shared cache file
the coldstart file
initialization scripts for NIS+
daemon logs error messages and warnings using syslog
Error messages are logged to the
facility with a priority of
and warning messages with a priority of
Additional status messages can be obtained using the
If the host principal does not have the proper security credentials
table for its domain, then running this program without the '-n' insecure mode
option may significantly
the performance of processes issuing NIS+ requests.
Created by unroff & hp-tools.
© by Hans-Peter Bischof. All Rights Reserved (1997).
Last modified 21/April/97