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Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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.\" Copyright (c) 1995, 1996
.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by Bill Paul.
.\" 4. Neither the name of the author nor the names of contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
$Id$ -> $FreeBSD$
1999-08-28 01:35:59 +00:00
.\" $FreeBSD$
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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.\"
.Dd June 2, 1996
.Dt RPC.YPXFRD 8
.Os
.Sh NAME
.Nm rpc.ypxfrd
.Nd "NIS map transfer server"
.Sh SYNOPSIS
mdoc(7) police: use the new features of the Nm macro.
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.Nm
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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.Op Fl p Ar path
.Sh DESCRIPTION
The
Use err(3). Remove multiply defined Id string.
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.Nm
english(4) police.
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utility is used to speed up the distribution of very large NIS maps
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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from NIS master to NIS slave servers.
The normal method for transfering
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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maps involves several steps:
.Bl -bullet -offset indent
.It
The master server calls
.Xr yppush 8
to inform the slave servers to start a transfer.
.It
The slave servers invoke
.Xr ypxfr 8 ,
which reads the entire contents of a map from the master server
using the yp_all() function.
.It
The
.Xr ypxfr 8
program then creates a new map database file by using the
.Xr db 3
library hash method to store the data that it receives from the server.
.It
When all the data has been retrieved,
.Xr ypxfr 8
moves the new file into place and sends
.Xr ypserv 8
on the local machine a YPPROC_CLEAR to tell it to refresh its
database handles.
.El
.Pp
This process can take several minutes when there are very large
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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maps involved.
For example: a passwd database with several tens of
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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thousands of entries can consume several megabytes of disk space,
and it can take the
.Xr db 3
library package a long time to sort and store all the records
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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in a hash database.
Consider also that there are two sets of map
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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files:
.Pa master.passwd.by{name,uid}
and
.Pa passwd.by{name,uid} .
.Pp
The
Use err(3). Remove multiply defined Id string.
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.Nm
The .Nm utility
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utility speeds up the transfer process by allowing NIS slave servers to
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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simply copy the master server's map files rather than building their
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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own from scratch.
Simply put,
Use err(3). Remove multiply defined Id string.
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.Nm
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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implements an RPC-based file transfer protocol.
Transfering even
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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a multi-megabyte file in this fashion takes only a few seconds compared
to the several minutes it would take even a reasonably fast slave server
to build a new map from scratch.
.Pp
The
Use err(3). Remove multiply defined Id string.
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.Nm
The .Nm utility
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utility uses the same access restriction mechanism as
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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.Xr ypserv 8 .
This means that slave servers will only be permitted to transfer
files if the rules in the
o There is no securenets(5) man page, refer to ypserv(8). Obtained from: DragonFlyBSD MFC after: 1 week
2006-11-02 07:36:33 +00:00
.Pa securenets
database permit it (see
.Xr ypserv 8
for more information on
.Pa securenets ) .
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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Furthermore, only slave servers using reserved
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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ports will be allowed to transfer the
.Pa master.passwd
maps.
.Sh OPTIONS
Use err(3). Remove multiply defined Id string.
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The following option is available:
.Bl -tag -width indent
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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.It Fl p Ar path
This option can be used to override the default path to
the location of the NIS
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
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map databases.
The compiled-in default path is
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
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.Pa /var/yp .
.El
.Sh FILES
.Bl -tag -width Pa -compact
.It Pa /var/yp/[domainname]/[maps]
The NIS maps for a particular NIS domain.
.El
.Sh SEE ALSO
yp(4) -> yp(8). PR: docs/30797
2002-01-14 16:59:03 +00:00
.Xr yp 8 ,
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
1996-06-05 04:36:55 +00:00
.Xr yppush 8 ,
Sort cross references.
1997-01-20 00:03:00 +00:00
.Xr ypserv 8 ,
.Xr ypxfr 8
Sort sections.
2005-01-18 20:02:45 +00:00
.Sh AUTHORS
.An Bill Paul Aq wpaul@ctr.columbia.edu
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
1996-06-05 04:36:55 +00:00
.Sh BUGS
Use err(3). Remove multiply defined Id string.
1997-10-13 11:22:39 +00:00
The
Use Fx macro wherever possible.
2000-11-14 11:20:58 +00:00
.Fx
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
1996-06-05 04:36:55 +00:00
.Nm ypxfrd
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
2000-03-01 14:09:25 +00:00
protocol is not compatible with that used by SunOS.
This is unfortunate
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
1996-06-05 04:36:55 +00:00
but unavoidable: Sun's protocol is not freely available, and even if it
Typos.
1997-02-05 07:36:51 +00:00
were it would probably not be useful since the SunOS NIS v2 implementation
Use err(3). Remove multiply defined Id string.
1997-10-13 11:22:39 +00:00
uses the original ndbm package for its map databases whereas the
Use Fx macro wherever possible.
2000-11-14 11:20:58 +00:00
.Fx
Remove single-space hard sentence breaks. These degrade the quality of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc.
2000-03-01 14:09:25 +00:00
implementation uses Berkeley DB.
These two packages use vastly different
file formats.
Furthermore, ndbm is byte-order sensitive and not very
Import rpc.ypxfrd. This server impliments an RPC-based file transfer protocol that allows an NIS slave server to copy a raw map database file from an NIS master. The goal here is to speed up the transfer of very large maps. If you have, for example, an NIS password database with 30,000 records in it, it can take around 8 to 10 minutes to regenerate it (four hash databases are created). As it stands now, ypxfr(8) transfers a map by sucking all the records from ypserv(8) on the master using yp_all() and writing them to a new database using the db(3) library. This adds up to another 8 to 10 minutes, per slave. With as the number of slaves increases, this latency becomes prohibitive. With rpc.ypxfrd, all the slave has to do is copy the already-built hash database file from the master and move it into place. Even with a multi-megabyte file, this reduces the master to slave transfer time to well under a minute. (This is using TCP.) Access restrictions are applied using the same mechanism as in ypserv: you can control access using /var/yp/securenets, and the server will not transmit the master.passwd.* maps unless the transfer request originates on a reserved port. Note: this server is based on my hastily contrived protocol and is _NOT_ compatible with Sun's protocol of the same name. It can't be compatible for a couple of reasons. For one thing, Sun's protocol has not been published anywhere that I know of. It is not included in any of the SunRPC source distributions that I've been able to find. Second, Sun's NIS v2 code uses old style ndbm maps while FreeBSD uses Berkeley DB. The file formats are incompatible, so being able to transfer maps between FreeBSD and SunOS hosts wouldn't do any good anyway. (You could always port the FreeBSD NIS code to SunOS if you really wanted to do it. :) (There's also the little fact that SunOS/SPARC is big-endian and FreeBSD/i386 is little-endian. Berkeley DB can handle byte ordering differences; ndbm probably can't.)
1996-06-05 04:36:55 +00:00
smart about it, meaning that am ndbm database created on a big endian
Expand *n't contractions.
2005-02-13 22:25:33 +00:00
system cannot be read on a little endian system.
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