XIV relies on lots of Intel cores and distributed caches to deliver performance. People who get hung up on disk systems being all about disk drives have trouble understanding XIV in so many ways, including power consumption.
If you’re going to compare XIV power consumption you need to be clear what you are comparing it to. XIV is positioned primarily against EMC VMAX-SE and HDS USP-V USP-VM. If you are comparing equivalent performance and capacity, you probably need to compare a XIV to a two-frame VMAX-SE and a two-frame USP-V USP-VM. The XIV has an immediate footprint advantage.
Whenever I have done comparisons, what I find is that no matter how you cut it, you will end up with something in the range of 7-10 KVA and 20-30 KBTU/Hr.
Most vendors’ marketing charts will show an advantage for themselves over others, and that is usually based on things like RAID selection, or comparing to an older system using smaller drives etc. Sure I have had customers tell me on occasion that we were much lower on power and cooling than another vendor, but I think that is generally sweet-spot dependent.
So my personal view on power and cooling for tier1 disk systems is that on average there is not much difference between vendors.
p.s. I have never been quite happy with this post on XIV power and cooling. Originally I intended to do a more quantitive analysis, but after several goes at it I gave up and settled for the unsatisfactory “not much difference” conclusion. A more accurate way of putting it would actually have been “it depends”, but that’s not much more satisfactory.
I feel similarly about price comparisons – they are two things that I think are best compared by customers in their specific situation.
I will try to stay away from areas like this in future and I apologise for the lack of usefulness of this original power & cooling post.
I feel better now.
Filed under: XIV |