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<div>Hi Kevin</div>

<div id="AppleMailSignature">Thanks for your response it was about 50 vms </div>

<div id="AppleMailSignature">Ajay<br>

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On Sep 11, 2017, at 9:49 AM, Kevin Benton <<a href="mailto:kevin@benton.pub">kevin@benton.pub</a>> wrote:<br>

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<div dir="ltr">The biggest improvement will be switching to native netlink calls: <a href="https://review.openstack.org/#/c/470912/">https://review.openstack.org/#/c/470912/</a>

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<div>How many VMs were on a single compute node?</div>

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<div class="gmail_quote">On Mon, Sep 11, 2017 at 9:15 AM, Ajay Kalambur (akalambu)

<span dir="ltr"><<a href="mailto:akalambu@cisco.com" target="_blank">akalambu@cisco.com</a>></span> wrote:<br>

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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">Hi</div>

<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">I am performing a scale test and I see that after creating 500 Vms with ping traffic between them it took almost 1 hr for the connection tracking </div>

<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">To clean up and ovs agent was busy doing this and unable to service any new port bind requests on some computes for almost an hr </div>

<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">It took that long for conntrack clean up to complete</div>

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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"><br>

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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">I see the following bug</div>

<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"><a href="https://bugs.launchpad.net/neutron/+bug/1513765" target="_blank">https://bugs.launchpad.net/<wbr>neutron/+bug/1513765</a></div>

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<div>And I also have the fix below</div>

<div><a href="https://git.openstack.org/cgit/openstack/neutron/commit/?id=d7aeb8dd4b1d122e17eef8687192cd122b79fd6e" target="_blank">https://git.openstack.org/<wbr>cgit/openstack/neutron/commit/<wbr>?id=<wbr>d7aeb8dd4b1d122e17eef8687192cd<wbr>122b79fd6e</a></div>

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<div>Still see really long times for conntrack cleanup</div>

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<div>What is the solution to this problem in scale scenarios?</div>

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<div>Ajay</div>

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