- <para condition="l22">In Lustre release 2.2, a feature has been added that allows striping
- across up to 2000 OSTs. By default, this "wide striping" feature is disabled. It is
- activated by setting the <literal>large_xattr</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 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. </para>
- <para>OR </para>
- <para>Use <literal>lfs_migrate</literal> with the option <literal>-c</literal>
- <replaceable>stripe_count</replaceable> (set <replaceable>stripe_count</replaceable>
- to 160) to move the files to another location.</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>
- </para></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>