source: postlfs/filesystems/lvm2.xml@ c3c56b2

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY lvm2-download-http " ">
  <!ENTITY lvm2-download-ftp  "ftp://sources.redhat.com/pub/lvm2/LVM2.&lvm2-version;.tgz">
  <!ENTITY lvm2-md5sum        "1ce5b7f9981e1d02dfd1d3857c8d9fbe">
  <!ENTITY lvm2-size          "1.2 MB">
  <!ENTITY lvm2-buildsize     "20 MB">
  <!ENTITY lvm2-time          "0.6 SBU">
]>

<sect1 id="lvm2" xreflabel="LVM2-&lvm2-version;">
  <?dbhtml filename="lvm2.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>LVM2-&lvm2-version;</title>

  <indexterm zone="lvm2">
    <primary sortas="a-LVM2">LVM2</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to LVM2</title>

    <para>
      The <application>LVM2</application> package is a package that manages
      logical partitions. It allows spanning of file systems across multiple
      physical disks and disk partitions and provides for dynamic growing or
      shrinking of logical partitions.
    </para>

    &lfs72_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&lvm2-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&lvm2-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &lvm2-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &lvm2-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &lvm2-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &lvm2-time;
        </para>
      </listitem>
    </itemizedlist>

    <para condition="html" role="usernotes">User Notes:
      <ulink url="&blfs-wiki;/lvm2"/>
    </para>
  </sect2>

  <sect2 role="kernel" id="lvm2-kernel">
    <title>Kernel Configuration</title>

    <para>
      Enable the following option in the kernel configuration
      and recompile the kernel:
    </para>

<screen><literal>Device Drivers ---&gt;
  Multiple devices driver support (RAID and LVM): Y
    Device mapper support: Y or M
    Crypt target support: (optional)
    Snapshot target: (optional)
    Mirror target: (optional) </literal></screen>

    <indexterm zone="lvm2 lvm2-kernel">
      <primary sortas="d-lvm2">lvm2</primary>
    </indexterm>

  </sect2>

  <sect2 role="installation">
    <title>Installation of LVM2</title>

    <para>
      Install <application>LVM2</application> by running the following
      commands:
    </para>

<screen><userinput>./configure --prefix=/usr       \
            --exec-prefix=      \
            --with-confdir=/etc \
            --enable-applib     \
            --enable-cmdlib     \
            --enable-pkgconfig  \
            --enable-udev_sync &amp;&amp;
make</userinput></screen>

    <para>
      To test the results, issue: <command>make check</command>.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>make install</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <option>--enable-applib</option>: This switch enables
      building of the shared application library.
    </para>

    <para>
      <option>--enable-cmdlib</option>: This switch enables
      building of the shared command library. It is required
      when building the event daemon.
    </para>

    <para>
      <option>--enable-pkgconfig</option>: This switch enables
      installation of <command>pkg-config</command> support files.
    </para>

    <para>
     <option>--enable-udev_sync</option>: This switch enables
      synchronisation with <application>Udev</application> processing.
    </para>

    <para>
      <option>--enable-dmeventd</option>: This switch enables
      building of the <application>Device Mapper</application>
      event daemon.
    </para>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          dmsetup, fsadm, lvm, lvmconf, lvmdump, vgimportclone. There
          are also numerous symbolic links to lvm that implement
          specific functionality.
        </seg>
        <seg>
          libdevmapper.so, liblvm2app.so and liblvm2cmd.so
        </seg>
        <seg>
          None
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="dmsetup">
        <term><command>dmsetup</command></term>
        <listitem>
          <para>
            is a low level logical volume management tool.
          </para>
          <indexterm zone="lvm2 dmsetup">
            <primary sortas="b-dmsetup">dmsetup</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fsadm">
        <term><command>fsadm</command></term>
        <listitem>
          <para>
            is an utility used to resize or check filesystem on a device.
          </para>
          <indexterm zone="lvm2 fsadm">
            <primary sortas="b-fsadm">fsadm</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lvm">
        <term><command>lvm</command></term>
        <listitem>
          <para>
            provides the command-line tools for <application>LVM2</application>.
            Commands are implemented via sympolic links to this program to
            manage physical devices (pv*), volume groups (vg*) and logical
            volumes (lv*).
          </para>
          <indexterm zone="lvm2 lvm">
            <primary sortas="b-lvm">lvm</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lvmconf">
        <term><command>lvmconf</command></term>
        <listitem>
          <para>
            is a script that modifies the locking configuration in 
            the <application>LVM2</application> configuration file.
          </para>
          <indexterm zone="lvm2 lvmconf">
            <primary sortas="b-lvmconf">lvmconf</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lvmdump">
        <term><command>lvmdump</command></term>
        <listitem>
          <para>
            is a tool used to dump various information concerning
            <application>LVM2</application>.
          </para>
          <indexterm zone="lvm2 lvmdump">
            <primary sortas="b-lvmdump">lvmdump</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="vgimportclone">
        <term><command>vgimportclone</command></term>
        <listitem>
          <para>
            is used to import a duplicated VG (e.g. hardware snapshot).
          </para>
          <indexterm zone="lvm2 vgimportclone">
            <primary sortas="b-vgimportclone">vgimportclone</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libdevmapper">
        <term><filename class='libraryfile'>libdevmapper.so</filename></term>
        <listitem>
          <para>
            contains the <application>Device Mapper</application> API
            functions.
          </para>
          <indexterm zone="lvm2 libdevmapper">
            <primary sortas="c-libdevmapper">libdevmapper.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>