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Hi,<br>
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In the older version of lustre, I can see a patch named "<span
class="separator"></span><strong class="final-path">raid5-merge-ios-rhel5.patch</strong>"
which is related to RAID performance improvement for RHEL5. <br>
<br>
As per my understanding, it accumulates the bios in a single
make_request function of RAID layer and sends them collectively by
generic_make_request instead of sending them separately per stripe
basis. <br>
By this means, performance of RAID could be improved.<br>
<br>
But this patch is not present in newer version of lustre and
especially for RHEL6.<br>
<br>
So, is it possible to port that patch for RHEL 6, provided RAID
architecture is changed significantly and handling of stripe has
been made asynchronous in RHEL 6 as compared to synchronous
handling of stripe in RHEL 5?<br>
And even if it can be ported for RHEL6, will it give advantage as
it was giving in RHEL 5 with different RAID architecture?<br>
<br>
<br>
Regards,<br>
Pratik<br>
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