On Fri, Oct 29, 2010 at 11:13 AM, Julien Escario <span dir="ltr"><<a href="mailto:escario@azylog.net">escario@azylog.net</a>></span> wrote: <div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Someone answered me that these preformances are perfectly normal is dual master configuration.<br></blockquote><div><br></div><div>Someone told you wrong.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Seems to be due to the network latency (first server I/O + network latency + second server I/O + network latency (ACK))<br></blockquote><div><br></div><div>You should still be able to get much better than 97MB/sec. I get over 800MB/sec with a dual-primary with a backing store capable of ~950 MB/sec.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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I finally decided that DRBD is unusable in dual primary setup because the performance drop.<br></blockquote><div><br></div><div>You were using 8.0.16, you should have tried with 8.3.x, 8.3 seems to do dual-primary a lot better in general.</div>
<div><br></div><div>-JR</div></div>