</para>
</listitem>
</itemizedlist>
<para>It is <emphasis>strongly</emphasis> recommended that sites perform
periodic device-level backup of the MDT(s)
</para>
</listitem>
</itemizedlist>
<para>It is <emphasis>strongly</emphasis> recommended that sites perform
periodic device-level backup of the MDT(s)
for example twice a week with alternate backups going to a separate
device, even if there is not enough capacity to do a full backup of all
of the filesystem data. Even if there are separate file-level backups of
for example twice a week with alternate backups going to a separate
device, even if there is not enough capacity to do a full backup of all
of the filesystem data. Even if there are separate file-level backups of
it is needed), and only needs good linear read/write performance. While
the device-level MDT backup is not useful for restoring individual files,
it is most efficient to handle the case of MDT failure or corruption.</para>
it is needed), and only needs good linear read/write performance. While
the device-level MDT backup is not useful for restoring individual files,
it is most efficient to handle the case of MDT failure or corruption.</para>
<literal>lustre_rsync</literal> is run, the user must specify a set of
parameters for the program to use. These parameters are described in
the following table and in
<literal>lustre_rsync</literal> is run, the user must specify a set of
parameters for the program to use. These parameters are described in
the following table and in
parameters are stored in the the status file, and only the name of the
status file needs to be passed to
<literal>lustre_rsync</literal>.</para>
parameters are stored in the the status file, and only the name of the
status file needs to be passed to
<literal>lustre_rsync</literal>.</para>
<primary>backup</primary>
<secondary>OST and MDT</secondary>
</indexterm>Backing Up an OST or MDT</title>
<primary>backup</primary>
<secondary>OST and MDT</secondary>
</indexterm>Backing Up an OST or MDT</title>
- <para>If backing up an MDT, substitute <literal>mdt</literal> for
- <literal>ost</literal> in the instructions below.</para>
+ <para>The below examples show backing up an OST filesystem. When backing
+ up an MDT, substitute <literal>mdt</literal> for <literal>ost</literal>
+ in the instructions below.</para>
will be immediately although there may be I/O errors reading
from files that are present on the MDT but not the OSTs, and files that
were created after the MDT backup will not be accessible or visible. See
will be immediately although there may be I/O errors reading
from files that are present on the MDT but not the OSTs, and files that
were created after the MDT backup will not be accessible or visible. See