nscd.conf

NSCD.CONF(5)							 NSCD.CONF(5)



NAME
       /etc/nscd.conf - name service cache daemon configuration file

DESCRIPTION
       The  file  /etc/nscd.conf  is  read from nscd(8) at startup. Each line
       specifies either an attribute and a value, or an	 attribute,  service,
       and a value. Fields are separated either by SPACE or TAB characters. A
       ‘#’ (number sign) indicates the	beginning  of  a  comment;  following
       characters, up to the end of the line, are not interpreted by nscd.


       Valid services are passwd, group, or hosts.

       logfile debug-file-name
	      Specifies	 name of the file to which debug info should be writ-
	      ten.

       debug-level value
	      Sets the desired debug level.

       threads number
	      This is the number of threads that  are  started	to  wait  for
	      requests. At least five threads will always be created.

       server-user user
	      If  this	option	is set, nscd will run as this user and not as
	      root.  If a separate cache for every user is used	 (-S  parame-
	      ter), this option is ignored.

       enable-cache service <yes|no>
	      Enables or disables the specified service cache.

       positive-time-to-live service value
	      Sets  the	 TTL  (time-to-live) for positive entries (successful
	      queries) in the specified cache for service.  Value is in	 sec-
	      onds.  Larger  values  increase cache hit rates and reduce mean
	      response times, but increase problems with cache coherence.

       negative-time-to-live service value
	      Sets the TTL (time-to-live) for negative entries	(unsuccessful
	      queries)	in the specified cache for service.  Value is in sec-
	      onds. Can result in  significant	performance  improvements  if
	      there  are several files owned by uids (user IDs) not in system
	      databases (for example untarring the linux  kernel  sources  as
	      root); should be kept small to reduce cache coherency problems.

       suggested-size service value
	      This is the internal hash table size,  value  should  remain  a
	      prime number for optimum efficiency.

       check-files service <yes|no>
	      Enables  or  disables checking the file belonging to the speci-
	      fied  service  for  changes.   The   files   are	 /etc/passwd,
	      /etc/group, and /etc/hosts.

       reload-count unlimited|<number>
	      Sets  the number of times a cached record is reloaded before it
	      is pruned from the cache.	 Each cache  record  has  a  timeout,
	      when  that  timeout  expires, nscd will either reload it (query
	      the NSS service again if the data hasn’t changed), or drop  it.

       paranoia <yes|no>
	      Enables or disables restart of nscd every restart-interval .

       restart-interval <time in seconds>
	      Is  interval  in	which nscd is restarted if option paranoia is
	      set. The default value is 3600.

       persistent service <yes|no>
	      Enables or disables persistent  storage  of  data.   Persistent
	      caches  are  stored  on  the  disk and therefore survive a nscd
	      restart or e.g. machine reboot.

       shared service <yes|no>
	      Enables or disables database  saring  among  nscd	 clients  (by
	      being  read-only	mmapped	 in  their address space, so the nscd
	      client can directly do the lookup and only if an entry  is  not
	      found there, ask nscd over socket to do the lookup).

       max-db-size service number-of-bytes
	      The maximum allowable size for the service.

       auto-propagate service <yes|no>
	      When  set	 to  no for passwd or group service, then the .byname
	      requests are not added to passwd.byuid  or  group.bygid  cache.
	      This  may	 help  for tables containing multiple records for the
	      same id.


SEE ALSO
       nscd(8)

AUTHOR
       nscd was written by Thorsten Kukuk and Ulrich Drepper.



GNU C Library			   1999-10			 NSCD.CONF(5)