Digimer,<div><br></div><div>Thanks for your reply.</div><div><br></div><div>I come up with the number 300M from DRBD official website "<span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">A good rule of thumb for this value(rate parameter) is to use about 30% of the available replication bandwidth. </span>". I use 10G Ethernet card for replication traffic, 1024M * 0.3 is 300M. What wrong with my calculation?</div>
<div><br></div><div>Ben</div><div>Commit yourself to constant self-improvement<br>
<br><br><div class="gmail_quote">On Tue, Jun 21, 2011 at 7:49 PM, Digimer <span dir="ltr"><<a href="mailto:linux@alteeve.com">linux@alteeve.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On 06/21/2011 06:42 PM, wang xuchen wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
syncer {<br>
rate 300M;<br>
verify-alg crc32c;<br>
al-extents 3800;<br>
}<br>
</blockquote>
<br></div>
Drop that to about 75% of your maximum sustainable throughput (at most, ideally even less).<br>
<br>
The problem you are describing is the reason why the default is low. :)<br><font color="#888888">
<br>
-- <br>
Digimer<br>
E-Mail: <a href="mailto:digimer@alteeve.com" target="_blank">digimer@alteeve.com</a><br>
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"I feel confined, only free to expand myself within boundaries."<br>
</font></blockquote></div><br></div>