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I'm a fan of the low cost, high density solutions provided by supermicro. For example:

http://www.supermicro.com/Aplus/system/2U/2022/AS-2022TC-BTRF.cfm

Low cost per node, high memory support and cheap sata/sas 3.5 commodity storage. Problem is you are stuck with their crappy onboard fakeraid raid controller. Some of their blade solutions have the same problem. Fortunately Linux provides a solution. I've been quite happy with Linux software raid in a raid 1 or raid 10 configuration. It works quite well with Ubuntu and RHEL6/CentOS6. The mirrored or striping software raids aren't computationally heavy and don't really impact modern cpus. Failures do not cripple performance and failed drives can be replaced without reboots.

So I'd like to see Nimbula use Linux software raid 1 when it detects two identical sized disks.

( I know some people think HW raid = good, SW raid = bad, but let's just avoid that debate. Linux software raid has been a useful and reliable tool for me, and I think it would be an asset to anyone trying to build a commodity hardware cloud. )

Hi Sherman,

This is a good point, I opened BEN-7176 feature enhancement request internally on this topic.

- Jeremy

Edited jeremy (Jan. 27, 2012 14:01:38)

Just to make it clear, on the hardware I mentioned above and some of the supermicro blade servers, there is no way to add a hw raid card. It's not just that I don't want to buy a $300 cheap hw raid card.