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39 .Nd "force propagation of updated NIS databases"
44 .Op Fl j Ar #parallel jobs
52 utility distributes updated NIS databases (or
54 from an NIS master server to NIS slave servers within an NIS
56 It is normally only run on the NIS master by
58 whenever any of the NIS maps are updated.
65 entry in the Makefile must first be commented out
68 configuration assumes a small network with only
69 a single NIS server; in such a configuration,
75 determines the names of the slave servers for a domain by searching the
77 map. A destination host (or a list of hosts) can also be manually
78 specified on the command line.
79 Once it has a complete list of slave servers, it sends a 'map transfer'
80 request to each slave, which in turn reads a copy of the map from
81 the master NIS server using
83 Included within each request is the name of the map to be copied
84 and some special information required by
86 to successfully 'callback' to
88 and carry out the transfer.
93 via callback will be printed to stderr.
95 The following options are available:
96 .Bl -tag -width indent
98 Specify a particular domain.
100 the local host system is used by default.
101 If the local host's domain
102 name is not set, the domain name must be specified with this flag.
104 Specify a timeout value in seconds.
108 will wait for a response from a slave server before sending a
109 map transfer request to the next slave server in its list.
110 .It Fl j Ar #parallel jobs
113 utility normally performs transfers serially, meaning that it will
114 send a map transfer request to one slave server and then wait for
115 it to respond before moving on to the next slave server.
117 with many slaves, it is more efficient to initiate several map transfers
118 at once so that the transfers can take place in parallel.
121 flag is used to specify the desired number of parallel jobs:
123 will initiate the specified number of transfers immediately and
124 listen for responses.
125 If the number of specified parallel jobs is
126 less than the number of slave servers,
128 will initiate only the number of specified jobs and then wait
129 for some of them to finish before starting any more.
133 handles callbacks asynchronously, which means that it will collect
134 and display the callback information received from
136 as soon as it arrives, even it arrives before all of the map
137 transfer requests have been sent.
139 Can be used to transfer a map to a user-specified machine or
140 group of machines instead of the list of servers contained in
143 map. A list of hosts can be specified by using multiple
150 expects all the local NIS maps to be stored under
154 flag can be used to specify an alternate path in the event that
155 the system administrator decides to store the NIS maps somewhere else.
157 Verbose mode: it causes
159 to print debugging messages as it runs.
160 Specifying this flag twice
166 .Bl -tag -width Pa -compact
167 .It Pa /var/yp/[domainname]/ypservers
168 the NIS ypservers map containing the names of all servers in
169 a particular NIS domain
176 The mechanism for transferring NIS maps in NIS v1 is different
177 than that in NIS version 2. This version of
179 has support for transferring maps to NIS v2 systems only.
181 .An Bill Paul Aq wpaul@ctr.columbia.edu