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<p><font size="2">Hi<br>
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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>
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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>
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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>
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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>
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Pros and cons between a SAN and Ceph would also be appreciated. <br>
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Regards<br>
Ian<br>
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