nbd-client.8.sgml

   1 <!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [
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  11
  12   <!-- Fill in your name for FIRSTNAME and SURNAME. -->
  13   <!ENTITY dhfirstname "<firstname>Wouter</firstname>">
  14   <!ENTITY dhsurname   "<surname>Verhelst</surname>">
  15   <!-- Please adjust the date whenever revising the manpage. -->
  16   <!ENTITY dhdate      "<date>september 19, 2001</date>">
  17   <!-- SECTION should be 1-8, maybe w/ subsection other parameters are
  18        allowed: see man(7), man(1). -->
  19   <!ENTITY dhsection   "<manvolnum>8</manvolnum>">
  20   <!ENTITY dhemail     "<email>wouter@debian.org</email>">
  21   <!ENTITY dhusername  "Wouter Verhelst">
  22   <!ENTITY dhucpackage "<refentrytitle>NBD-CLIENT</refentrytitle>">
  23   <!ENTITY dhpackage   "nbd-client">
  24
  25   <!ENTITY debian      "<productname>Debian GNU/Linux</productname>">
  26   <!ENTITY gnu         "<acronym>GNU</acronym>">
  27 ]>
  28
  29 <refentry>
  30   <refentryinfo>
  31     <address>
  32       &dhemail;
  33     </address>
  34     <author>
  35       &dhfirstname;
  36       &dhsurname;
  37     </author>
  38     <copyright>
  39       <year>2001</year>
  40       <holder>&dhusername;</holder>
  41     </copyright>
  42     &dhdate;
  43   </refentryinfo>
  44   <refmeta>
  45     &dhucpackage;
  46
  47     &dhsection;
  48   </refmeta>
  49   <refnamediv>
  50     <refname>&dhpackage;</refname>
  51
  52     <refpurpose>connect to a server running nbd-server(1), to use its
  53     exported block device</refpurpose>
  54   </refnamediv>
  55   <refsynopsisdiv>
  56     <cmdsynopsis>
  57       <command>&dhpackage;</command>
  58       <arg><option>bs=<replaceable>blocksize</replaceable></option></arg>
  59       <arg choice=plain><option><replaceable>host</replaceable></option></arg>
  60       <arg choice=plain><option><replaceable>port</replaceable></option></arg>
  61       <arg choice=plain><option><replaceable>nbd-device</replaceable></option></arg>
  62       <arg><option>-swap</option></arg>
  63     </cmdsynopsis>
  64     <cmdsynopsis>
  65       <command>&dhpackage;</command>
  66       <arg choice=plain><option>-d <replaceable>nbd-device</replaceable></option></arg>
  67     </cmdsynopsis>
  68   </refsynopsisdiv>
  69   <refsect1>
  70     <title>DESCRIPTION</title>
  71
  72     <para>This manual page documents briefly the
  73       <command>&dhpackage;</command> command.</para>
  74
  75     <para>With <command>&dhpackage;</command>, you can connect to a
  76     server running <command>nbd-server</command>, thus using raw
  77     diskspace from that server as a blockdevice on the local
  78     client.</para>
  79
  80     <para>To do this, support from the Linux Kernel is necessary, in
  81     the form of the Network Block Device (NBD). When you have that,
  82     either in the kernel, or as a module, you can connect to an NBD
  83     server and use its exported file through a block special file with
  84     major mode 43.</para>
  85
  86   </refsect1>
  87   <refsect1>
  88     <title>OPTIONS</title>
  89
  90     <para>The following options are supported:</para>
  91
  92     <variablelist>
  93       <varlistentry>
  94         <term><option>bs=<replaceable>blocksize</replaceable></option></term>
  95         <listitem>
  96           <para>Use a blocksize of "blocksize". Default is 1024;
  97             allowed values are either 512, 1024, 2048 or 4096</para>
  98         </listitem>
  99       </varlistentry>
 100       <varlistentry>
 101         <term><option>host</option></term>
 102         <listitem>
 103           <para>The hostname of the machine running
 104             <command>nbd-server</command>.</para>
 105         </listitem>
 106       </varlistentry>
 107       <varlistentry>
 108         <term><option>port</option></term>
 109         <listitem>
 110           <para>The TCP port on which <command>nbd-server</command> is
 111             running at the server.</para>
 112         </listitem>
 113       </varlistentry>
 114       <varlistentry>
 115         <term><option>nbd-device</option></term>
 116         <listitem>
 117           <para>The block special file this nbd-client should connect
 118             to.</para>
 119         </listitem>
 120       </varlistentry>
 121       <varlistentry>
 122         <term><option>-swap</option></term>
 123         <listitem>
 124           <para>Specifies that this NBD device will be used as
 125             swapspace. If you intend to do that, please use this
 126             option to prevent deadlocks. You'll need a special kernel
 127             patch, available at NBD's homepage:
 128             http://atrey.karlin.mff.cuni.cz/~pavel</para>
 129         </listitem>
 130       </varlistentry>
 131     </variablelist>
 132   </refsect1>
 133   <refsect1>
 134     <title>EXAMPLES</title>
 135
 136     <para>Some examples of nbd-client usage:</para>
 137     <itemizedlist mark="none">
 138       <listitem>
 139         <para>To connect to a server running on port 2000 at host
 140           "server.domain.com", using the client's block special file
 141           "/dev/nd0":</para>
 142         <para><command>nbd-client server.domain.com 2000
 143           /dev/nd0</command></para>
 144       </listitem>
 145       <listitem>
 146         <para>To connect to a server running on port 2001 at host
 147           "swapserver.domain.com", using the client's block special
 148           file "/dev/nd1", for swap purposes:</para>
 149         <para><command>nbd-client swapserver.domain.com 2001 /dev/nd1
 150           -swap</command></para>
 151       </listitem>
 152       <listitem>
 153         <para>To disconnect the above connection again (after making
 154           sure the block special file is not in use anymore):</para>
 155         <para><command>nbd-client -d /dev/nd1</command></para>
 156       </listitem>
 157     </itemizedlist>
 158   </refsect1>
 159   <refsect1>
 160     <title>SEE ALSO</title>
 161
 162     <para>nbd-server (1).</para>
 163
 164   </refsect1>
 165   <refsect1>
 166     <title>AUTHOR</title>
 167     <para>The NBD kernel module and the NBD tools have been written by
 168     Pavel Macheck (pavel@ucw.cz). Maintenance of the kernel module was taken
 169     over by Paul Clements <email>Paul.Clements@steeleye.com></email>, while
 170     &dhusername; &dhemail; took over maintenance of the NBD userland
 171     tools.</para>
 172
 173     <para>This manual page was written by &dhusername; &dhemail; for
 174     the &debian; system (but may be used by others).  Permission is
 175     granted to copy, distribute and/or modify this document under the
 176     terms of the <acronym>GNU</acronym> General Public License,
 177     version 2, as published by the Free Software Foundation.</para>
 178
 179   </refsect1>
 180 </refentry>
 181
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