[8bc3edae] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY lvm2-download-http " ">
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[54789f3] | 8 | <!ENTITY lvm2-download-ftp "ftp://sources.redhat.com/pub/lvm2/releases/LVM2.&lvm2-version;.tgz">
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[d7bee48] | 9 | <!ENTITY lvm2-md5sum "3b1be9a67d8000040931f3e88ec10557">
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[50e6a9f7] | 10 | <!ENTITY lvm2-size "1.9 MB">
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[d7bee48] | 11 | <!ENTITY lvm2-buildsize "27 MB (add 13 MB for tests, however transient files can grow up to around 500 MB)">
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| 12 | <!ENTITY lvm2-time "0.4 SBU (additional 5.4 SBU for tests)">
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[8bc3edae] | 13 | ]>
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| 14 |
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[c627795] | 15 | <sect1 id="lvm2" xreflabel="LVM2-&lvm2-version;">
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[8bc3edae] | 16 | <?dbhtml filename="lvm2.html"?>
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| 17 |
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| 18 | <sect1info>
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| 19 | <othername>$LastChangedBy$</othername>
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| 20 | <date>$Date$</date>
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| 21 | </sect1info>
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| 22 |
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[c627795] | 23 | <title>LVM2-&lvm2-version;</title>
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[8bc3edae] | 24 |
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| 25 | <indexterm zone="lvm2">
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[c627795] | 26 | <primary sortas="a-LVM2">LVM2</primary>
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[8bc3edae] | 27 | </indexterm>
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| 28 |
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| 29 | <sect2 role="package">
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[c627795] | 30 | <title>Introduction to LVM2</title>
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[8bc3edae] | 31 |
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[c627795] | 32 | <para>
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[54789f3] | 33 | The <application>LVM2</application> package is a set of utilities that manages
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[c627795] | 34 | logical partitions. It allows spanning of file systems across multiple
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| 35 | physical disks and disk partitions and provides for dynamic growing or
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[54789f3] | 36 | shrinking of logical partitions, mirroring and low storage footprint snapshots.
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[c627795] | 37 | </para>
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[8bc3edae] | 38 |
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[8ee0429] | 39 | &lfs79_checked;&gcc6_checked;
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[8bc3edae] | 40 |
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| 41 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 42 | <itemizedlist spacing="compact">
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[f60cf4a] | 43 | <listitem>
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[c627795] | 44 | <para>
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| 45 | Download (HTTP): <ulink url="&lvm2-download-http;"/>
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| 46 | </para>
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[f60cf4a] | 47 | </listitem>
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[8bc3edae] | 48 | <listitem>
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[c627795] | 49 | <para>
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| 50 | Download (FTP): <ulink url="&lvm2-download-ftp;"/>
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| 51 | </para>
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[8bc3edae] | 52 | </listitem>
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| 53 | <listitem>
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[c627795] | 54 | <para>
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| 55 | Download MD5 sum: &lvm2-md5sum;
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| 56 | </para>
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[8bc3edae] | 57 | </listitem>
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| 58 | <listitem>
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[c627795] | 59 | <para>
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| 60 | Download size: &lvm2-size;
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| 61 | </para>
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[8bc3edae] | 62 | </listitem>
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| 63 | <listitem>
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[c627795] | 64 | <para>
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| 65 | Estimated disk space required: &lvm2-buildsize;
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| 66 | </para>
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[8bc3edae] | 67 | </listitem>
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| 68 | <listitem>
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[c627795] | 69 | <para>
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| 70 | Estimated build time: &lvm2-time;
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| 71 | </para>
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[8bc3edae] | 72 | </listitem>
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| 73 | </itemizedlist>
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| 74 |
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[b5e8375] | 75 | <bridgehead renderas="sect3">LVM2 Dependencies</bridgehead>
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| 76 |
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| 77 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 78 | <para role="optional">
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[54789f3] | 79 | <xref linkend='mdadm'/> (for checks),
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| 80 | <xref linkend='reiserfs'/>,
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| 81 | <xref linkend='valgrind'/>,
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| 82 | <xref linkend='which'/>,
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| 83 | <xref linkend='xfsprogs'/> (all five may be used, but are not required,
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| 84 | for tests), and
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| 85 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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| 86 | thin-provisioning-tools</ulink>
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[b5e8375] | 87 | </para>
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| 88 |
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[8bc3edae] | 89 | <para condition="html" role="usernotes">User Notes:
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[c627795] | 90 | <ulink url="&blfs-wiki;/lvm2"/>
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| 91 | </para>
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[54789f3] | 92 |
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[9a3e4ba] | 93 | <caution>
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[54789f3] | 94 | <para>
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[9a3e4ba] | 95 | Kernel versions between 4.1 and 4.4.1 have a broken RAID
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| 96 | implementation. If you want to use RAID type LV's, you should install
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| 97 | kernel version 4.4.2 or above. Note that several tests use RAID logical
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| 98 | volumes, and can generate a <quote>kernel oops</quote> with the faulty
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| 99 | kernel version, which usually renders the system unusable.
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[54789f3] | 100 | </para>
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[9a3e4ba] | 101 | </caution>
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[8bc3edae] | 102 | </sect2>
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| 103 |
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[c627795] | 104 | <sect2 role="kernel" id="lvm2-kernel">
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[7e1df8f9] | 105 | <title>Kernel Configuration</title>
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| 106 |
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[c627795] | 107 | <para>
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[ac38e9dc] | 108 | Enable the following options in the kernel configuration
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[c627795] | 109 | and recompile the kernel:
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| 110 | </para>
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[7e1df8f9] | 111 |
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[b5e8375] | 112 | <note><para>
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| 113 | There are several other Device Mapper options in the kernel beyond those
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| 114 | listed below. In order to get reasonable results if running the
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| 115 | regression tests, all must be enabled either internally or as a module.
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| 116 | </para></note>
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| 117 |
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[7e1df8f9] | 118 | <screen><literal>Device Drivers --->
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[ac38e9dc] | 119 | [*] Multiple devices driver support (RAID and LVM) ---> [CONFIG_MD]
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| 120 | <*/M> Device mapper support [CONFIG_BLK_DEV_DM]
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| 121 | <*/M/ > Crypt target support [CONFIG_DM_CRYPT]
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| 122 | <*/M/ > Snapshot target [CONFIG_DM_SNAPSHOT]
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[54789f3] | 123 | <*/M/ > Thin provisioning target [CONFIG_DM_THIN_PROVISIONING]
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[ac38e9dc] | 124 | <*/M/ > Mirror target [CONFIG_DM_MIRROR]</literal></screen>
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[7e1df8f9] | 125 |
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| 126 | <indexterm zone="lvm2 lvm2-kernel">
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| 127 | <primary sortas="d-lvm2">lvm2</primary>
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| 128 | </indexterm>
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| 129 |
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| 130 | </sect2>
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| 131 |
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[8bc3edae] | 132 | <sect2 role="installation">
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[c627795] | 133 | <title>Installation of LVM2</title>
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[8bc3edae] | 134 |
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[c627795] | 135 | <para>
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| 136 | Install <application>LVM2</application> by running the following
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| 137 | commands:
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| 138 | </para>
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[8bc3edae] | 139 |
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[54789f3] | 140 | <screen><userinput>SAVEPATH=$PATH &&
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| 141 | PATH=$PATH:/sbin:/usr/sbin &&
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| 142 | ./configure --prefix=/usr \
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[4591404] | 143 | --exec-prefix= \
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[f60cf4a] | 144 | --with-confdir=/etc \
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[4591404] | 145 | --enable-applib \
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| 146 | --enable-cmdlib \
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| 147 | --enable-pkgconfig \
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[a1b18af2] | 148 | --enable-udev_sync &&
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[54789f3] | 149 | make &&
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| 150 | PATH=$SAVEPATH &&
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| 151 | unset SAVEPATH</userinput></screen>
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| 152 |
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| 153 | <para>
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| 154 | The tests use <application>udev</application> for logical volume
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| 155 | synchronization, so the LVM udev rules and some utilities need to
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| 156 | be installed before running the tests. If you are installing
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| 157 | <application>LVM2</application> for the first time, and do not
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| 158 | want to install the full package before running the tests, the minimal
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| 159 | set of utilities can be installed by running the following commands
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| 160 | as the <systemitem class="username">root</systemitem> user:
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| 161 | </para>
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| 162 |
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| 163 | <screen role="root"><userinput>make -C tools install_dmsetup_dynamic &&
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| 164 | make -C udev install &&
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| 165 | make -C libdm install</userinput></screen>
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| 166 |
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| 167 | <para>
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| 168 | To test the results, issue: <command>make check_local</command> as the
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| 169 | <systemitem class="username">root</systemitem> user. Other targets are
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| 170 | available and can be listed with <command>make -C test help</command>.
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| 171 | The test timings are very dependent on the speed of the disk(s), and on
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| 172 | the number of enabled kernel options.
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| 173 | </para>
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| 174 | <para>
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| 175 | Those tests do not implement the <quote>expected fail</quote> possibility,
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| 176 | and a small number of test failures is expected by upstream. More
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| 177 | failures may happen because some kernel options are missing. For example,
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| 178 | the lack of the <emphasis>dm-delay</emphasis> device mapper target may
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[54aaa89] | 179 | explain some failures. Some tests are flagged
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[54789f3] | 180 | <quote>warned</quote> if
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| 181 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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| 182 | thin-provisioning-tools</ulink> are not installed. A workaround is to
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| 183 | add the following flags to <command>configure</command>:
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| 184 | </para>
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| 185 |
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| 186 | <screen role="nodump"><userinput> --with-thin-check= \
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| 187 | --with-thin-dump= \
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| 188 | --with-thin-repair= \
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| 189 | --with-thin-restore= \
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| 190 | --with-cache-check= \
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| 191 | --with-cache-dump= \
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| 192 | --with-cache-repair= \
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| 193 | --with-cache-restore= \</userinput></screen>
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[8bc3edae] | 194 |
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[c627795] | 195 | <para>
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[54789f3] | 196 | Some tests may hang with kernel versions within the 4.1 and 4.2 series (see
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| 197 | above). They can be removed if necessary, for example: <command>rm
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| 198 | test/shell/lvcreate-large-raid.sh</command>. The tests generate a lot
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| 199 | of kernel messages, which may clutter your terminal. You can disable them
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| 200 | by issuing <command>dmesg -D</command> before running the tests (do not
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| 201 | forget to issue <command>dmesg -E</command> when the tests are done).
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[c627795] | 202 | </para>
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[8bc3edae] | 203 |
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[c627795] | 204 | <para>
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| 205 | Now, as the <systemitem class="username">root</systemitem> user:
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| 206 | </para>
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[8bc3edae] | 207 |
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| 208 | <screen role="root"><userinput>make install</userinput></screen>
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| 209 |
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| 210 | </sect2>
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| 211 |
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| 212 | <sect2 role="commands">
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| 213 | <title>Command Explanations</title>
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| 214 |
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[54789f3] | 215 | <para>
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| 216 | <command>PATH=$PATH:/sbin:/usr/sbin</command>: The path
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| 217 | must contain <filename class="directory">/sbin</filename> and
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| 218 | <filename class="directory">/usr/sbin</filename> for proper system tool
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| 219 | detection by the <command>configure</command> script. This command
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[027c7d7] | 220 | ensures that PATH is properly set if you are building as an unprivileged
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| 221 | user.
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[54789f3] | 222 | </para>
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| 223 |
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[c627795] | 224 | <para>
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[2800af7] | 225 | <parameter>--enable-applib</parameter>: This switch enables
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[c627795] | 226 | building of the shared application library.
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| 227 | </para>
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| 228 |
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| 229 | <para>
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[2800af7] | 230 | <parameter>--enable-cmdlib</parameter>: This switch enables
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[c627795] | 231 | building of the shared command library. It is required
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| 232 | when building the event daemon.
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| 233 | </para>
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[54789f3] | 234 |
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| 235 | <para>
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| 236 | <option>--enable-lvmetad</option>: This switch enables
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| 237 | building of the <application>LVM</application> metadata daemon,
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| 238 | which avoids scanning all the filesystems when an LVM command is
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| 239 | run.
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| 240 | </para>
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[c627795] | 241 |
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| 242 | <para>
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[2800af7] | 243 | <parameter>--enable-pkgconfig</parameter>: This switch enables
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[c627795] | 244 | installation of <command>pkg-config</command> support files.
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| 245 | </para>
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| 246 |
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| 247 | <para>
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[2800af7] | 248 | <parameter>--enable-udev_sync</parameter>: This switch enables
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[c627795] | 249 | synchronisation with <application>Udev</application> processing.
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| 250 | </para>
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| 251 |
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| 252 | <para>
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| 253 | <option>--enable-dmeventd</option>: This switch enables
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| 254 | building of the <application>Device Mapper</application>
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| 255 | event daemon.
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| 256 | </para>
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[8bc3edae] | 257 |
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| 258 | </sect2>
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| 259 |
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| 260 | <sect2 role="content">
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| 261 | <title>Contents</title>
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| 262 |
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| 263 | <segmentedlist>
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| 264 | <segtitle>Installed Programs</segtitle>
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| 265 | <segtitle>Installed Libraries</segtitle>
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[c3c56b2] | 266 | <segtitle>Installed Directories</segtitle>
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[8bc3edae] | 267 |
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| 268 | <seglistitem>
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[c627795] | 269 | <seg>
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[54789f3] | 270 | blkdeactivate,
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| 271 | dmeventd (optional),
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| 272 | dmsetup,
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| 273 | fsadm,
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| 274 | lvm,
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| 275 | lvmconf,
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| 276 | lvmdump,
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| 277 | lvmetad (optional),
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| 278 | and vgimportclone.
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| 279 | There are also numerous symbolic links to
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[ac38e9dc] | 280 | lvm that implement specific functionalities
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[c627795] | 281 | </seg>
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| 282 | <seg>
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[54789f3] | 283 | libdevmapper.so,
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| 284 | liblvm2app.so,
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| 285 | and liblvm2cmd.so;
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| 286 | optional: libdevmapper-event.so,
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| 287 | libdevmapper-event-lvm2.so,
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| 288 | libdevmapper-event-lvm2mirror.so,
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| 289 | libdevmapper-event-lvm2snapshot.so,
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| 290 | libdevmapper-event-lvm2raid.so,
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| 291 | and libdevmapper-event-lvm2thin.so
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[c627795] | 292 | </seg>
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[c3c56b2] | 293 | <seg>
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[a037dab] | 294 | /etc/lvm and
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| 295 | /lib/device-mapper (optional)
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[c3c56b2] | 296 | </seg>
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[8bc3edae] | 297 | </seglistitem>
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| 298 | </segmentedlist>
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| 299 |
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| 300 | <variablelist>
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| 301 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 302 | <?dbfo list-presentation="list"?>
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[61b95ac4] | 303 |
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| 304 | <?dbhtml list-presentation="table"?>
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[8bc3edae] | 305 |
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[8ed30d52] | 306 | <varlistentry id="blkdeactivate">
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| 307 | <term><command>blkdeactivate</command></term>
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| 308 | <listitem>
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| 309 | <para>
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[8770a48] | 310 | is a utility to deactivate block device.
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[8ed30d52] | 311 | </para>
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| 312 | <indexterm zone="lvm2 blkdeactivate">
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| 313 | <primary sortas="b-blkdeactivate">blkdeactivate</primary>
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| 314 | </indexterm>
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| 315 | </listitem>
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| 316 | </varlistentry>
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| 317 |
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[a037dab] | 318 | <varlistentry id="dmeventd">
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| 319 | <term><command>dmeventd</command></term>
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| 320 | <listitem>
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| 321 | <para>
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| 322 | (optional) is the Device Mapper event daemon.
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| 323 | </para>
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| 324 | <indexterm zone="lvm2 dmeventd">
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| 325 | <primary sortas="b-dmeventd">dmeventd</primary>
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| 326 | </indexterm>
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| 327 | </listitem>
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| 328 | </varlistentry>
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| 329 |
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[8bc3edae] | 330 | <varlistentry id="dmsetup">
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| 331 | <term><command>dmsetup</command></term>
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| 332 | <listitem>
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[c627795] | 333 | <para>
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| 334 | is a low level logical volume management tool.
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| 335 | </para>
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[8bc3edae] | 336 | <indexterm zone="lvm2 dmsetup">
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| 337 | <primary sortas="b-dmsetup">dmsetup</primary>
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| 338 | </indexterm>
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| 339 | </listitem>
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| 340 | </varlistentry>
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| 341 |
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| 342 | <varlistentry id="fsadm">
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| 343 | <term><command>fsadm</command></term>
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| 344 | <listitem>
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[c627795] | 345 | <para>
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[cb0bbd2] | 346 | is a utility used to resize or check filesystem on a device.
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[c627795] | 347 | </para>
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[8bc3edae] | 348 | <indexterm zone="lvm2 fsadm">
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| 349 | <primary sortas="b-fsadm">fsadm</primary>
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| 350 | </indexterm>
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| 351 | </listitem>
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| 352 | </varlistentry>
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| 353 |
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| 354 | <varlistentry id="lvm">
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| 355 | <term><command>lvm</command></term>
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| 356 | <listitem>
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[c627795] | 357 | <para>
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| 358 | provides the command-line tools for <application>LVM2</application>.
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| 359 | Commands are implemented via sympolic links to this program to
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| 360 | manage physical devices (pv*), volume groups (vg*) and logical
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| 361 | volumes (lv*).
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| 362 | </para>
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[8bc3edae] | 363 | <indexterm zone="lvm2 lvm">
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| 364 | <primary sortas="b-lvm">lvm</primary>
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| 365 | </indexterm>
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| 366 | </listitem>
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| 367 | </varlistentry>
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| 368 |
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| 369 | <varlistentry id="lvmconf">
|
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| 370 | <term><command>lvmconf</command></term>
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| 371 | <listitem>
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[c627795] | 372 | <para>
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[0d7900a] | 373 | is a script that modifies the locking configuration in
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[c627795] | 374 | the <application>LVM2</application> configuration file.
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| 375 | </para>
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[8bc3edae] | 376 | <indexterm zone="lvm2 lvmconf">
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| 377 | <primary sortas="b-lvmconf">lvmconf</primary>
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| 378 | </indexterm>
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| 379 | </listitem>
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| 380 | </varlistentry>
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| 381 |
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| 382 | <varlistentry id="lvmdump">
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| 383 | <term><command>lvmdump</command></term>
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| 384 | <listitem>
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[c627795] | 385 | <para>
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| 386 | is a tool used to dump various information concerning
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| 387 | <application>LVM2</application>.
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| 388 | </para>
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[8bc3edae] | 389 | <indexterm zone="lvm2 lvmdump">
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| 390 | <primary sortas="b-lvmdump">lvmdump</primary>
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| 391 | </indexterm>
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| 392 | </listitem>
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| 393 | </varlistentry>
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| 394 |
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[54789f3] | 395 | <varlistentry id="lvmetad">
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| 396 | <term><command>lvmetad</command></term>
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| 397 | <listitem>
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| 398 | <para>
|
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| 399 | (optional) is the LVM metadata daemon.
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| 400 | </para>
|
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| 401 | <indexterm zone="lvm2 lvmetad">
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| 402 | <primary sortas="b-lvmetad">lvmetad</primary>
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| 403 | </indexterm>
|
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| 404 | </listitem>
|
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| 405 | </varlistentry>
|
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| 406 |
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[8bc3edae] | 407 | <varlistentry id="vgimportclone">
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| 408 | <term><command>vgimportclone</command></term>
|
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| 409 | <listitem>
|
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[c627795] | 410 | <para>
|
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| 411 | is used to import a duplicated VG (e.g. hardware snapshot).
|
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| 412 | </para>
|
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[8bc3edae] | 413 | <indexterm zone="lvm2 vgimportclone">
|
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| 414 | <primary sortas="b-vgimportclone">vgimportclone</primary>
|
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| 415 | </indexterm>
|
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| 416 | </listitem>
|
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| 417 | </varlistentry>
|
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| 418 |
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| 419 | <varlistentry id="libdevmapper">
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| 420 | <term><filename class='libraryfile'>libdevmapper.so</filename></term>
|
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| 421 | <listitem>
|
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[c627795] | 422 | <para>
|
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| 423 | contains the <application>Device Mapper</application> API
|
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| 424 | functions.
|
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| 425 | </para>
|
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[8bc3edae] | 426 | <indexterm zone="lvm2 libdevmapper">
|
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| 427 | <primary sortas="c-libdevmapper">libdevmapper.so</primary>
|
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| 428 | </indexterm>
|
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| 429 | </listitem>
|
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| 430 | </varlistentry>
|
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| 431 |
|
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| 432 | </variablelist>
|
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| 433 |
|
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| 434 | </sect2>
|
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| 435 |
|
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| 436 | </sect1>
|
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