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 nischttl(1)							 nischttl(1)




 NAME
      nischttl - change the time to live value of an NIS+ object

 SYNOPSIS
      nischttl [ -AfLP ] time name...

 DESCRIPTION
      nischttl changes the time to live value (ttl) of the NIS+ objects or
      entries specified by name to time.  Entries are specified using
      indexed names (see nismatch(1)).

      The time to live value is used by object caches to expire objects
      within their cache.  When an object is read into the cache, this value
      is added to the current time in seconds yielding the time when the
      cached object would expire.  The object may be returned from the cache
      as long as the current time is earlier than the calculated expiration
      time.  When the expiration time has been reached, the object will be
      flushed from the cache.

      The time to live time may be specified in seconds or in days, hours,
      minutes, seconds format.	The latter format uses a suffix letter of d,
      h, m, or s to identify the units of time.	 See the examples below for
      usage.

      The command will fail if the master NIS+ server is not running.

    Options
      -A   Modify all tables in the concatenation path that match the search
	   criterion specified in name.	 This option implies the -P switch.

      -f   Force the operation and fail silently if it does not succeed.

      -L   Follow links and change the time to live of the linked object or
	   entries rather than the time to live of the link itself.

      -P   Follow the concatenation path within a named table.	This option
	   only makes sense when either name is an indexed name or the -L
	   switch is also specified and the named object is a link pointing
	   to entries.

 EXAMPLES
      Change the ttl of an object using the seconds format and the days,
      hours, minutes, seconds format (the ttl of the second object is set to
      1 day and 12 hours):

	   nischttl 184000 object
	   nischttl 1d12h object

      Change the ttl for a password entry:





 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 nischttl(1)							 nischttl(1)




	   nischttl 1h30m '[uid=99],passwd.org_dir'

      Change the ttl of the object or entries pointed to by a link, and the
      ttl of all entries in the hobbies table:

	   nischttl -L 12h linkname
	   nischttl 3600 '[],hobbies'

 EXTERNAL INFLUENCES
    Environment Variables
      NIS_PATH	     If this variable is set and the NIS+ name is not fully
		     qualified, each directory specified will be searched
		     until the object is found (see nisdefaults(1)).

 RETURN VALUE
      nischttl returns 0 on success and 1 on failure.

 AUTHOR
      nischttl was developed by Sun Microsystems, Inc.

 SEE ALSO
      nis+(1), nischgrp(1), nischmod(1), nischown(1), nisdefaults(1),
      nis_objects(3N).

 NOTES
      Setting a high ttl value allows objects to stay persistent in caches
      for a longer period of time and can improve performance.	However,
      when an object changes, in the worst case, the number of seconds in
      this attribute must pass before that change is visible to all clients.
      Setting a ttl value of 0 means that the object should not be cached at
      all.

      A high ttl value is a week, a low value is less than a minute.
      Password entries should have ttl values of about 12 hours (easily
      allows one password change per day), entries in the RPC table can have
      ttl values of several weeks (this information is effectively
      unchanging).

      Only directory and group objects are cached in this implementation.















 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000