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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I am not entirely familiar with Ceph but when considering SAN deployments make sure you check out some of the newer providers in that market like Nimble Storage,
Pure Storage, etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Equallogic is pretty far behind in hardware/technology vs. what some of the newer competitors are doing with SSD.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-Drew<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Ian Marshall [mailto:Ian.Marshall@freedom-finance.com]
<br>
<b>Sent:</b> Friday, April 04, 2014 2:17 AM<br>
<b>To:</b> openstack@lists.openstack.org<br>
<b>Subject:</b> [Openstack] Ceph as unified storage solution<o:p></o:p></span></p>
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<p><span style="font-size:10.0pt">Hi<br>
<br>
I am implementing a small Openstack production system across two sites. This will initially have 2 controller nodes (also acting as network nodes) and 2 compute nodes at each site. Network up to hadware load balancers will be 10gbe.<br>
<br>
Expectation is we will be running about 80-100 VMs at each site (4gb Ram and 20gb volumes). These will boot and run from block storage. About 90% of these will run Tomcat servers, the others Apache. They will be stateless.<br>
<br>
I have been told Ceph solution will not provide the necessary performance compared to SAN (EquaLogic) unless using SSD drives for journals which is out of budget at present. If I was confident to go with Ceph - I would be planning 2 storage servers with 10k
sas drives and write back cache on raid controllers and have each drive as Raid0 with a partition for journals.<br>
<br>
Could anyone provide evidence of using Ceph for this size production, as my preference is a ceph based stirage solution to privide flexibility in storage - especially as long term plan is to replicate across WAN.<br>
<br>
Pros and cons between a SAN and Ceph would also be appreciated. <br>
<br>
Regards<br>
Ian</span><o:p></o:p></p>
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