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>
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<br><br><div class="gmail_quote">On Tue, Feb 19, 2013 at 9:35 AM, gtt116 <span dir="ltr"><<a 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>
</font></span></div>
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