<secondary>multiple MDSs</secondary>
</indexterm>
<indexterm>
- <primary>large_xattr</primary>
- <secondary>ea_inode</secondary>
+ <primary>ea_inode</primary>
+ <secondary>large_xattr</secondary>
</indexterm>
<indexterm>
<primary>wide striping</primary>
- <secondary>large_xattr</secondary>
- <tertiary>ea_inode</tertiary>
+ <secondary>ea_inode</secondary>
+ <tertiary>large_xattr</tertiary>
</indexterm>Upgrading to Lustre Software Release 2.x (Major
Release)</title>
<para>The procedure for upgrading from a Lustre software release 2.x to a
- more recent 2.x release of the Lustre software is described in this
- section.</para>
- <note>
- <para>This procedure can also be used to upgrade Lustre software release
- 1.8.6-wc1 or later to any Lustre software release 2.x. To upgrade other
- versions of Lustre software release 1.8.x, contact your support
- provider.</para>
- </note>
- <note>
- <para>In Lustre software release 2.2, a feature has been added for
- ldiskfs-based MDTs that allows striping a single file across up to 2000
- OSTs. By default, this "wide striping" feature is disabled. It is
- activated by setting the <literal>ea_inode</literal> option on the MDT
- using either <literal>mkfs.lustre</literal> or <literal>tune2fs</literal>.
- For example after upgrading an existing file system to Lustre software
- release 2.2 or later, wide striping can be enabled by running the
- following command on the MDT device before mounting it:
- <screen>tune2fs -O large_xattr</screen>
- Once the wide striping feature is enabled and in use on the MDT, it is
- not possible to directly downgrade the MDT file system to an earlier
- version of the Lustre software that does not support wide striping. To
- disable wide striping:
- <orderedlist>
- <listitem>
- <para>Delete all wide-striped files, <emphasis>OR</emphasis>
- use <literal>lfs_migrate -c 160</literal> (or fewer stripes)
- to migrate the files to use fewer OSTs. This does not affect the
- total number of OSTs that the whole filesystem can access.</para>
- </listitem>
- <listitem>
- <para>Unmount the MDT.</para>
- </listitem>
- <listitem>
- <para>Run the following command to turn off the
- <literal>large_xattr</literal> option:
- <screen>tune2fs -O ^large_xattr</screen></para>
- </listitem>
- </orderedlist>Using either
- <literal>mkfs.lustre</literal> or
- <literal>tune2fs</literal> with
- <literal>large_xattr</literal> or
- <literal>ea_inode</literal> option reseults in
- <literal>ea_inode</literal> in the file system feature list.</para>
- </note>
- <note>
- <para>To generate a list of all files with more than 160 stripes use
- <literal>lfs find</literal> with the
- <literal>--stripe-count</literal> option:
- <screen>lfs find ${mountpoint} --stripe-count=+160</screen></para>
- </note>
- <note condition="l24">
- <para>In Lustre software release 2.4, a new feature allows using multiple
- MDTs, which can each serve one or more remote sub-directories in the file
- system. The
- <literal>root</literal> directory is always located on MDT0.</para>
- <para>Note that clients running a release prior to the Lustre software
- release 2.4 can only see the namespace hosted by MDT0 and will return an
- IO error if an attempt is made to access a directory on another
- MDT.</para>
- </note>
- <para>To upgrade a Lustre software release 2.x to a more recent major
- release, complete these steps:</para>
+ more recent 2.y major release of the Lustre software is described in this
+ section. To upgrade an existing 2.x installation to a more recent major
+ release, complete the following steps:</para>
<orderedlist>
<listitem>
<para>Create a complete, restorable file system backup.</para>
</orderedlist>
</listitem>
<listitem>
- <para>(Optional) For upgrades to Lustre software release 2.2 or higher,
- to enable wide striping on an existing MDT, run the following command
- on the MDT:
- <screen>tune2fs -O ea_inode /dev/<replaceable>mdtdev</replaceable></screen>
+ <para condition="l2D">Lustre allows striping a single file across up to
+ 2000 OSTs. Before Lustre 2.13, the "wide striping" feature that
+ allowed creating files with more than 160 stripes was not enabled by
+ default. From the 2.13 release onward, the <literal>ea_inode</literal>
+ feature is enabled for newly-formatted MDTs. The feature can also
+ be enabled by the <literal>tune2fs</literal> command on existing MDTs:
+ <screen>mds# tune2fs -O ea_inode /dev/<replaceable>mdtdev</replaceable></screen>
</para>
<para>For more information about wide striping, see
<xref xmlns:xlink="http://www.w3.org/1999/xlink" linkend="wide_striping" />.</para>
</listitem>
<listitem>
- <para>(Optional) For upgrades to Lustre software release 2.4 or higher,
- to format an additional MDT, complete these steps:
+ <para>(Optional) To format an additional MDT, complete these steps:
<orderedlist numeration="loweralpha">
<listitem>
<para>Determine the index used for the first MDT (each MDT must
</orderedlist></para>
</listitem>
<listitem>
- <para>(Optional) If you are upgrading to Lustre software release 2.3 or
- higher from Lustre software release 2.2 or earlier and want to enable
- the quota feature, complete these steps:
- <orderedlist numeration="loweralpha">
- <listitem>
- <para>Before setting up the file system, enter on both the MDS and
- OSTs:
- <screen>tunefs.lustre --quota</screen></para>
- </listitem>
- <listitem>
<para>(Optional) If you are upgrading before Lustre software release
2.10, to enable the project quota feature enter the following on every
ldiskfs backend target:
should only be enabled if the project quota feature is required and/or
after it is known that the upgraded release does not need to be
downgraded.</para></note>
- </listitem>
- <listitem>
- <para>When setting up the file system, enter:
- <screen>conf_param $FSNAME.quota.mdt=$QUOTA_TYPE
+ <para>When setting up the file system, enter:
+ <screen>conf_param $FSNAME.quota.mdt=$QUOTA_TYPE
conf_param $FSNAME.quota.ost=$QUOTA_TYPE</screen></para>
- </listitem>
- </orderedlist></para>
- </listitem>
- <listitem>
- <para>(Optional) If you are upgrading from Lustre software release 1.8,
- you must manually enable the FID-in-dirent feature. On the MDS, enter:
- <screen>tune2fs –O dirdata /dev/<replaceable>mdtdev</replaceable></screen></para>
- <warning>
- <para>This step is not reversible. Do not complete this step until
- you are sure you will not be downgrading the Lustre software.</para>
- </warning>
- <para condition='l24'>This step only enables FID-in-dirent for newly
- created files. If you are upgrading to Lustre software release 2.4,
- you can use namespace LFSCK to enable FID-in-dirent for the existing
- files. For the case of upgrading from Lustre software release 1.8, it is
- important to note that if you do NOT enable <literal>dirdata</literal> via
- the <literal>tune2fs</literal> command above, the namespace LFSCK will NOT
- generate FID-in-dirent for the existing files. For more information about
- FID-in-dirent and related functionalities in LFSCK, see
- <xref xmlns:xlink="http://www.w3.org/1999/xlink"
- linkend="understandinglustre.storageio" />.</para>
</listitem>
<listitem>
<para>Start the Lustre file system by starting the components in the
git://git.whamcloud.com / doc / manual.git / blobdiff