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<?xml version="1.0" encoding="UTF-8"?>
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<table id="multipath-components-table">
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<title>DM-Multipath Components</title>
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<tgroup align="left" cols="2" rowsep="1">
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<colspec colname="c1" colwidth="1.3*"/>
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<colspec colname="c2" colwidth="3.6*"/>
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<entry align="left">Component</entry>
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<entry align="left">Description</entry>
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<emphasis role="bold">dm_multipath kernel module</emphasis>
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<entry>Reroutes I/O and supports <emphasis
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role="bold">failover</emphasis> for paths and path groups.</entry>
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<emphasis role="bold">multipath command</emphasis>
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<entry>Lists and configures <emphasis role="bold">multipath</emphasis>
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devices. Normally started up with <filename>/etc/rc.sysinit</filename>, it can also be
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started up by a udev program whenever a block device is added or it
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can be run by the initramfs file system.</entry>
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<emphasis role="bold">multipathd daemon</emphasis>
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<entry>Monitors paths; as paths fail and come back, it may initiate
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path group switches. Provides for interactive changes to <emphasis
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role="bold">multipath</emphasis> devices. This daemon must be restarted for
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any changes to the <filename>/etc/multipath.conf</filename> file to take effect.</entry>
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<emphasis role="bold">kpartx command</emphasis>
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<entry>Creates device mapper devices for the partitions on a device It
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is necessary to use this command for DOS-based partitions with DM-Multipath.
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The kpartx is provided in its own package, but the <emphasis
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role="bold">multipath-tools</emphasis> package depends on it.</entry>
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serverguide/C/storage/dm-multipath/multipath-components-table.xml
