<div dir="ltr">Thanks Rolandas, great catch!<div><br></div><div>I completely agree with your suggestion:</div><div><a href="http://dev.opennebula.org/issues/1722">http://dev.opennebula.org/issues/1722</a><br></div><div><br>
</div><div style>thanks again,</div><div style><br></div><div style>cheers,<br>Jaime</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jan 3, 2013 at 11:47 AM, Rolandas Naujikas <span dir="ltr"><<a href="mailto:rolandas.naujikas@mif.vu.lt" target="_blank">rolandas.naujikas@mif.vu.lt</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
When testing on 3.8.1 I found, that shutdown/cancel/delete of VM in a host is done in parallel without ability to configure concurrency (like MAX_HOST in sched.conf). That leads to several problems:<br>
(1) potential overload of storage with persistent images (ssh/qcow2 TM drivers)<br>
(2) race conditions in ebtables/iptables, as those tools doesn't support concurrent execution<br>
<br>
I saw (2) in my crash tests (submitting many VMs to the host with network=ebtables and doing onevm shutdown on them), which could be solved with "flock /tmp/ebtables sudo ebtables" and "flock /tmp/iptables sudo iptables" in OpenNebulaNetwork.rb as a workaround.<br>
<br>
When MAX_HOST=1 in sched.conf, then there are no problems with ebtables/iptables concurrency in deploy time, but when MAX_HOST>1, then the (2) problem could also be.<br>
<br>
Regards, Rolandas Naujikas<br>
______________________________<u></u>_________________<br>
Users mailing list<br>
<a href="mailto:Users@lists.opennebula.org" target="_blank">Users@lists.opennebula.org</a><br>
<a href="http://lists.opennebula.org/listinfo.cgi/users-opennebula.org" target="_blank">http://lists.opennebula.org/<u></u>listinfo.cgi/users-opennebula.<u></u>org</a><br>
</blockquote></div><br></div><br clear="all"><div><br></div>-- <br>Jaime Melis<br>Project Engineer<br>OpenNebula - The Open Source Toolkit for Cloud Computing<br><a href="http://www.OpenNebula.org" target="_blank">www.OpenNebula.org</a> | <a href="mailto:jmelis@opennebula.org" target="_blank">jmelis@opennebula.org</a>