nscd man page on FreeBSD

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NSCD(8)			  BSD System Manager's Manual		       NSCD(8)

NAME
     nscd — name service caching daemon

SYNOPSIS
     nscd [-dnst] [-i cachename] [-I cachename]

DESCRIPTION
     The nscd utility is the system caching daemon.  It can cache almost all
     types of data and is basically intended to be used with the nsswitch sub‐
     system.  The cache is actually per-user.  This means that each user can
     work only with the cached data that were cached by themselves, and cannot
     poison the cache of other users.  The nscd utility supports two types of
     caching:

     Type  Description

     Common caching
	   Each cached element is the key+value pair.  This type of caching
	   supports policies which are applied when maximum number of cached
	   elements is exceeded.  Three policies are available: FIFO (first in
	   - first out), LRU (least recently used) and LFU (least frequently
	   used).  This type of caching is used with the getXXXbyname() family
	   of functions.

     Multipart caching
	   Each cached element is the part of the elements sequence.  This
	   type of caching is intended to be used with the getXXXent() family
	   of functions.

     The nscd utility is able not only to cache elements, but to perform the
     actual nsswitch lookups by itself.	 To enable this feature, use the
     perform-actual-lookups parameter in nscd.conf(5).

     The nscd utility recognizes the following runtime options:

     -n	     Do not daemonize; nscd will not fork or disconnect itself from
	     the terminal.

     -s	     Single-threaded mode.  Forces using only one thread for all pro‐
	     cessing purposes (it overrides the threads parameter in the
	     nscd.conf(5) file).

     -t	     Trace mode.  All trace messages will be written to stdout.	 This
	     mode is usually used with -n and -s flags are used for debugging
	     purposes.

     -i cachename
	     Invalidates personal cache.  When specified, nscd acts as the
	     administration tool.  It asks the already running nscd to invali‐
	     date the specified part of the cache of the calling user.	For
	     example, sometimes you may want to invalidate your “hosts” cache.
	     You can specify “all” as the cachename to invalidate your per‐
	     sonal cache as a whole.  You cannot use this option for the
	     cachename for which the perform-actual-lookups option is enabled.

     -I cachename
	     Invalidates the cache for every user.  When specified, nscd acts
	     as the administration tool.  It asks the already running nscd to
	     invalidate the specified part of the cache for every user.	 You
	     can specify “all” as the cachename to invalidate the whole cache.
	     Only the root can use this option.

FILES
     /etc/nscd.conf  The default configuration file.

SEE ALSO
     nsdispatch(3), nscd.conf(5), nsswitch.conf(5)

AUTHORS
     Michael Bushkov ⟨bushman@freebsd.org⟩

BUGS
     Please send bug reports and suggestions to ⟨bushman@freebsd.org⟩.

BSD			       October 20, 2005				   BSD
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