If the MDT is upgraded from Lustre software release 1.8, you
need to enable FID-in-dirent manually by "tune2fs -O dirdata".
Otherwise, the namespace LFSCK (since Lustre-2.4) will not
generate FID-in-dirent for the existing files.
Signed-off-by: Fan Yong <fan.yong@intel.com>
Change-Id: Ie562ce8aa2b336bf3afcdcea8f3ccdf396cb7502
Reviewed-on: https://review.whamcloud.com/26025
Tested-by: Jenkins
Reviewed-by: Joseph Gmitter <joseph.gmitter@intel.com>
<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>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 LFSCK to enable FID-in-dirent for 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>
+ <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
</listitem>
<listitem>
<para>Start the Lustre file system by starting the components in the