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YPPUSH(8)		FreeBSD	System Manager's Manual		     YPPUSH(8)

NAME
     yppush -- force propagation of updated NIS	databases

SYNOPSIS
     yppush [-d	domain]	[-t timeout] [-j #parallel jobs] [-h host] [-p path]
	    [-v] mapname

DESCRIPTION
     The yppush	utility	distributes updated NIS	databases (or maps) from an
     NIS master	server to NIS slave servers within an NIS domain.  It is nor-
     mally only	run on the NIS master by /var/yp/Makefile whenever any of the
     NIS maps are updated.  Note that /var/yp/Makefile does not	invoke yppush
     by	default: the ``NOPUSH=True'' entry in the Makefile must	first be com-
     mented out	(the default FreeBSD configuration assumes a small network
     with only a single	NIS server; in such a configuration, yppush is not
     needed).

     By	default, yppush	determines the names of	the slave servers for a	domain
     by	searching the ypservers	map.  A	destination host (or a list of hosts)
     can also be manually specified on the command line.  Once it has a	com-
     plete list	of slave servers, it sends a 'map transfer' request to each
     slave, which in turn reads	a copy of the map from the master NIS server
     using ypxfr(8).  Included within each request is the name of the map to
     be	copied and some	special	information required by	ypxfr(8) to success-
     fully 'callback' to yppush	and carry out the transfer.  Any error mes-
     sages yppush receives from	ypxfr(8) via callback will be printed to
     stderr.

     The following options are available:

     -d	domain
	     Specify a particular domain.  The NIS domain of the local host
	     system is used by default.	 If the	local host's domain name is
	     not set, the domain name must be specified	with this flag.

     -t	timeout
	     Specify a timeout value in	seconds.  This timeout controls	how
	     long yppush will wait for a response from a slave server before
	     sending a map transfer request to the next	slave server in	its
	     list.

     -j	#parallel jobs
	     The yppush	utility	normally performs transfers serially, meaning
	     that it will send a map transfer request to one slave server and
	     then wait for it to respond before	moving on to the next slave
	     server.  In environments with many	slaves,	it is more efficient
	     to	initiate several map transfers at once so that the transfers
	     can take place in parallel.  The -j flag is used to specify the
	     desired number of parallel	jobs: yppush will initiate the speci-
	     fied number of transfers immediately and listen for responses.
	     If	the number of specified	parallel jobs is less than the number
	     of	slave servers, yppush will initiate only the number of speci-
	     fied jobs and then	wait for some of them to finish	before start-
	     ing any more.

	     Note that yppush handles callbacks	asynchronously,	which means
	     that it will collect and display the callback information
	     received from ypxfr(8) as soon as it arrives, even	it arrives
	     before all	of the map transfer requests have been sent.

     -h	host
	     Can be used to transfer a map to a	user-specified machine or
	     group of machines instead of the list of servers contained	in the
	     ypservers map.  A list of hosts can be specified by using multi-
	     ple instances of the -h flag.

     -p	path
	     By	default, yppush	expects	all the	local NIS maps to be stored
	     under /var/yp.  The -p flag can be	used to	specify	an alternate
	     path in the event that the	system administrator decides to	store
	     the NIS maps somewhere else.

     -v	     Verbose mode: it causes yppush to print debugging messages	as it
	     runs.  Specifying this flag twice makes yppush even more verbose.

FILES
     /var/yp/[domainname]/ypservers    the NIS ypservers map containing	the
				       names of	all servers in a particular
				       NIS domain

SEE ALSO
     yp(8), ypserv(8), ypxfr(8)

AUTHORS
     Bill Paul <wpaul@ctr.columbia.edu>

BUGS
     The mechanism for transferring NIS	maps in	NIS v1 is different than that
     in	NIS version 2.	This version of	yppush has support for transferring
     maps to NIS v2 systems only.

FreeBSD	9.2		       February	5, 1995			   FreeBSD 9.2

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | AUTHORS | BUGS

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