The allocsize tweak was also on the wiki. I applied that yesterday as well. :)<br><br>-Rob<br><br><div class="gmail_quote">On Fri, Oct 22, 2010 at 10:33 AM, Matthew McClement <span dir="ltr"><<a href="mailto:mythtv@macker.co.uk">mythtv@macker.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div></div><div class="h5">On 10/21/2010 07:13 PM, Rob Dege wrote:<br>
> Hello,<br>
><br>
> I just stumbled upon this wiki entry today regarding XFS tweaks, and<br>
> have a question about the RAID Array section<br>
> (<a href="http://www.mythtv.org/wiki/Optimizing_Performance#Optimizing_XFS_on_RAID_Arrays" target="_blank">http://www.mythtv.org/wiki/Optimizing_Performance#Optimizing_XFS_on_RAID_Arrays</a>)<br>
><br>
> My system currently uses 2 disks in software raid 0 for /myth. The<br>
> filesystem was built/formatted back in 2007 (when I first built the<br>
> machine). Given that I don't want to reformat the partition, is it okay<br>
> to add the custom sunit and swidth values to the mount options, even<br>
> though they wouldn't match the values on the partition?<br>
><br>
> xfs_info on /dev/md0 shows the sunit=16 and swidth=32<br>
><br>
> The script recommends sunit=128 and swidth=256<br>
<br>
</div></div>The settings can be changed at mount time without regardless of what was<br>
used during the initial mkfs.xfs. The only thing that might still be<br>
badly aligned is the journal, but there's not much you can do about that<br>
without reformatting. And I second the suggestion to use allocsize to<br>
help reduce fragmentation.<br>
<br>
Matt<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>-Rob<br><br>Hell hath no fury like a snowplow driver from Cheektowaga who gave<br>up cable and Canadian beer so he could afford Bills season tickets.<br>