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 Post subject: EVA vs 3PAR
PostPosted: Wed Oct 24, 2012 10:55 pm 

Joined: Wed Oct 24, 2012 10:52 pm
Posts: 4
Hi, anyone tried to compare between EVA and 3PAR on single thread sequential writes. It seems EVA is better. Did anyone try ?
Thanks


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 Post subject: Re: EVA vs 3PAR
PostPosted: Wed Oct 24, 2012 11:42 pm 
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Joined: Tue Aug 18, 2009 10:35 pm
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Location: Dallas, Texas
Got any specs or benchmarks to add some substance and depth to your topic? How exactly does it "seem better"?

How big was the EVA disk pool vs the 3PAR?
Disk types/rpm?

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Richard Siemers
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 Post subject: Re: EVA vs 3PAR
PostPosted: Thu Oct 25, 2012 12:49 am 

Joined: Wed Oct 24, 2012 10:52 pm
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I tried 250G SQLdump.
From EVA8000(20 x 10K/vRAID5) to P6300 (16 x 7.2k /vRAID5) =
From EVA8000(20 x 10K/vRAID5) to 3PARF400 (16 x 7.2k /vRAID5) =


Last edited by mlev.26s on Thu Oct 25, 2012 8:27 am, edited 1 time in total.

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 Post subject: Re: EVA vs 3PAR
PostPosted: Thu Oct 25, 2012 7:29 am 
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Wow, 300% slower... to get that huge delta in performance, something else is interfering with your benchmarks. One vendor's flavor of raid5 vs another's using identical spindle configuration should yield anywhere from a 0% to maybe 15% difference... 300% is cause to re-evaluate and analyze your benchmark environment until you understand WHY that is so different. I guarantee you something is not apples to apples there.

250gb at 20 mins is about 208 mb/s.
250gb at 62.4 mins is only 4 mb/s second.

Could compression have been turned on for one dump and not the other?

--Richard

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 Post subject: Re: EVA vs 3PAR
PostPosted: Thu Oct 25, 2012 9:37 pm 

Joined: Wed Oct 24, 2012 10:52 pm
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I did a simple testing.
Local copy to EVA and Local copy to 3PAR. EVA is better


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 Post subject: Re: EVA vs 3PAR
PostPosted: Fri Oct 26, 2012 5:53 pm 
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I don't want to sound confrontational... 4 mb/s can be beat by a USB 1.0 external drive, single spindle. If it was a copy from local disk to SAN, I would guess the local drives you were reading from were busy doing something else at the same time.

If you re-run the test(s) you should keep an eye on the queue depth and response time of source drive and the target drive... as well as MB/s total on each. You can only write as fast as you can read in a test like that.

Better then that though, you may want to try using IOmeter for benchmarking instead.

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