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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Thanks. How’s the storage handled ?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">We’re seeing slow I/O on local storage (which is also limited on space) and latencies with Ceph for block storage.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Tim<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black"><medberry@gmail.com> on behalf of David Medberry <openstack@medberry.net><br>
<b>Date: </b>Friday 2 September 2016 at 22:18<br>
<b>To: </b>Tim Bell <Tim.Bell@cern.ch><br>
<b>Cc: </b>openstack-operators <openstack-operators@lists.openstack.org><br>
<b>Subject: </b>Re: [Openstack-operators] ElasticSearch on OpenStack<o:p></o:p></span></p>
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<p class="MsoNormal">Nathan: The page at <a href="https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html">
https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html</a> gives you good advice on a maximum size for the elasticsearch VM's memory.<o:p></o:p></p>
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<p class="MsoNormal">Nathan: suggest you pick a flavor with 64GB RAM or less, then base other sizing things off of that (i.e. choose a flavor with 64GB of RAM and as many CPUs as possible for that RAM allocation, then base disk size on testing of your use case)<o:p></o:p></p>
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<p class="MsoNormal">Nathan: give java heap 30GB, and leave the rest of the memory to the OS filesystem cache so that Lucene can make best use of it.<o:p></o:p></p>
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<p class="MsoNormal">Nathan: that's mostly it for tuning. elasticsearch publishes many other docs for tuning recommendations, but there isn't anything specific to openstack besides the flavor choice. i personally chose CPU size (8CPU) such that all vCPUs for
each VM would fit on a single NUMA node, which is a best practice for ESXi but not sure if it applies to KVM.<o:p></o:p></p>
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<p class="MsoNormal">(resending for clarity)<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Sep 2, 2016 at 6:46 AM, David Medberry <<a href="mailto:openstack@medberry.net" target="_blank">openstack@medberry.net</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hey Tim, <o:p></o:p></p>
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<p class="MsoNormal">We've just started this effort. I'll see if the guy running the service can comment today.<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Sep 2, 2016 at 6:36 AM, Tim Bell <<a href="mailto:Tim.Bell@cern.ch" target="_blank">Tim.Bell@cern.ch</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Has anyone had experience running ElasticSearch on top of OpenStack VMs ?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Are there any tuning recommendations ?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Thanks</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:#888888">Tim</span><span style="color:#888888"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>
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<a href="mailto:OpenStack-operators@lists.openstack.org" target="_blank">OpenStack-operators@lists.openstack.org</a><br>
<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators</a><o:p></o:p></p>
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