Re: [a bit off-topic] Power usage estimation of hardware for Ceph

[Chris Kitzmiller <ckitzmiller@xxxxxxxxxxxxx>]

On Apr 8, 2015, at 8:59 AM, Francois Lafont wrote:

Sorry in advance for this thread not directly linked to Ceph. ;)
We are thinking about buying servers to build a ceph cluster and we
would like to have, if possible, a *approximative* power usage
estimation of these servers (this parameter could be important in
your choice):

Just as a single data point I can speak to my own nodes. I'm using SM 847A [1] chassis. They're 4U, 36 x 3.5" hot swap bays with 2 internal 2.5" bays. So:

30 x 7200 RPM SATA

6 x SSD Journals

2 x SSD OS / Mon

2 x E5-2620 2.0GHz

With the cluster at a relatively idle state each chassis pulls ~400 watts and ~440 watts under load. I'd only use this info for rough estimations though ;)

[1] http://www.supermicro.com/products/chassis/4U/847/SC847A-R1K28W.cfm

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