Thanks Felix. Upgraded to 8.3 and able to see reasonable performance.<div><br></div><div>Lin<br><br><div class="gmail_quote">On Wed, Jan 16, 2013 at 6:54 AM, Felix Frank <span dir="ltr"><<a href="mailto:ff@mpexnet.de" target="_blank">ff@mpexnet.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<div class="im"><br>
On 01/10/2013 10:09 PM, Lin Zhao wrote:<br>
> BTW we are using drbd 8.2<br>
<br>
</div>Why?<br>
<div class="im"><br>
> On Thu, Jan 10, 2013 at 1:08 PM, Lin Zhao <<a href="mailto:lin@groupon.com">lin@groupon.com</a><br>
</div><div class="im">> <mailto:<a href="mailto:lin@groupon.com">lin@groupon.com</a>>> wrote:<br>
><br>
> All,<br>
><br>
> I'm setting up a drbd setup for my system, but the poor disk write<br>
> performance is really throttling my system, even with Protocol A.<br>
> The write speed needs to be 20MB/s to not bottleneck my system.<br>
> Anyone has advice tuning for small writes? 10kb writes is the most<br>
> common operations my system does.<br>
><br>
> It doesn't make much sense to me Protocol A performance is so much<br>
> off native. Anyone has a theory?<br>
<br>
</div>Perhaps it's the ancient DRBD. What kernel is this, anyway?<br>
<br>
If upgrading to recent 8.3.x doesn't help, you may want to try tuning<br>
your tcp buffers, but please do the obvious thing first.<br>
<br>
Cheers,<br>
Felix<br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br>Lin Zhao<br>Data Platform Engineer<br>3101 Park Blvd, Palo Alto, CA 94306<br>
</div>