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<div class="moz-cite-prefix">Hi Diego<br>
<br>
Thanks for you reply.<br>
How many hosts do you have? I have 4 hosts. And in this bug,
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<a href="https://bugs.launchpad.net/nova/+bug/1094226">https://bugs.launchpad.net/nova/+bug/1094226</a>,
The N is 20. In my environment N is about 16. <br>
<br>
I found that nova-network is too busy to deal with so many rpc
request at the same time. The Rabbitmq is strong enough in the
scenario.<br>
<br>
于 2013年02月19日 16:54, Diego Parrilla Santamaría 写道:<br>
</div>
<blockquote
cite="mid:CAASO9xbDkcNT_VtN_KJT0Nb0siYNopYAg32R1yRZgdm8POabdg@mail.gmail.com"
type="cite">Hi gtt,
<div><br>
</div>
<div>what does it mean for you 'lots of instance simultaneously'?
100, 1000, 10000, more?</div>
<div><br>
</div>
<div>We have launched >100 (but less than <1000)
simultaneously without any issue. Rabbit running in a multicore
with several gigs of RAM with out of the box configuration.</div>
<div><br>
</div>
<div>Cheers</div>
<div>Diego</div>
<div>
<div> -- <br>
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<div><font><span style="font-family:Arial" lang="ES">Diego
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<br>
<br>
<div class="gmail_quote">On Tue, Feb 19, 2013 at 9:35 AM, gtt116
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:gtt116@126.com" target="_blank">gtt116@126.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hi all,<br>
<br>
When create lots of instance simultaneously, there will be
lots of instance in ERROR state. And most of them are
caused by network rpc request timeout. This result is not
so graceful. <br>
<br>
I think it will be better if scheduler keep a queue of
creating request. when he find all the hosts are busy
enough(compute_node.current_workload reach some value),
stop cast the request to host temporarily, until he found
some host free enough. In this way, we can make sure
booting lots of instances simultaneously results in active
instances rather than lots of ERROR instance. but will
cause a small weak point, if the top value of
current_workload small enough, create instance processing
will be slow.<br>
<br>
Do you have another quick fix?<br>
<br>
Thanks,<span class="HOEnZb"><font color="#888888"><br>
<pre cols="72">--
best regards,
gtt</pre>
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<pre class="moz-signature" cols="72">--
best regards,
gtt</pre>
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