* Posts by Clockspeedy

3 posts • joined 21 Apr 2012

Million-plus IOPS: Kaminario smashes IBM in DRAM decimation

Clockspeedy
Joke

Too funny...

I was wondering how it Kaminario could have possibly come up with an 'architecture' to make DRAM go thousands of times slower than it should. 3.4 milliseconds? That's ridiculous.

I looked at the benchmark docs...this thing is nothing but a rack full of forty-seven Dell server blades (cheapest available) connected to a FC SAN, with RAMdisk software, software RAID and an APC UPS to make it "non-volatile". Oh yeah, and a 1,900% markup piled on for good measure.

No, really. I'm not kidding.

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Clockspeedy
FAIL

So what? Anyone can slap this together with off-the-shelf parts in an hour...

...easy.

Take a Intel E7 box off the shelf (IBM x3850 X5 is nice), load it with DRAM and RAMdisk software (e.g. SuperSpeed) and voila, you have up to 3TB of DRAM-speed disk...from a real vendor...with real support...for 1/3rd the price.

FYI, this is what SAP uses for their HANA in-memory database.

Yawn.

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WTF is... scale-in?

Clockspeedy
Boffin

Explanation of Scale-In

Scale-in relates to elasticity. It's a concept that's been around a few years, and it's actually quite relevant to IBM's new systems, although not at all in the way their marketing folks have spun it.

http://blogs.technet.com/b/scvmm/archive/2011/05/18/scvmm-2012-an-explanation-of-scale-in-and-scale-out-for-a-service.aspx

http://blog.codingoutloud.com/2010/07/27/three-types-of-scaling-in-the-cloud-scale-up-scale-out-and-now-scale-side-by-side-with-juxtaposition-scaling/

http://publib.boulder.ibm.com/infocenter/wxsinfo/v7r0/topic/com.ibm.websphere.extremescale.over.doc/cxsoverview.html

Tinyurl for IBM link:

http://tinyurl.com/6o8xkt3

And there's a very nice picture here (Fig. 5):

http://www.cs.uwaterloo.ca/~ashraf/pubs/smdb12voltdb.pdf

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