Open Stack

Hello,

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.

Equallogic is pretty far behind in hardware/technology vs. what some of the newer competitors are doing with SSD.

Thanks,
-Drew

From: Ian Marshall [mailto:Ian.Marshall at freedom-finance.com]
Sent: Friday, April 04, 2014 2:17 AM
To: openstack at lists.openstack.org
Subject: [Openstack] Ceph as unified storage solution


Hi

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.

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.

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.

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.

Pros and cons between a SAN and Ceph would also be appreciated.

Regards
Ian

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