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
     normally 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
     commented 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
     complete 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
     successfully 'callback' to yppush and carry out the transfer.  Any error
     messages 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
             specified 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 specified jobs and then wait for some of them to finish before
             starting 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
             multiple 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 13.1-RELEASE-p6        February 5, 1995        FreeBSD 13.1-RELEASE-p6