That’s ok (I had considered it) but this can causes other “political” issues.

Anyway I was reading about Hyper-V 2012 and SMB transport. I know that is SO new (and we know which king of nightmares the Microsoft novelties bring) but somewhere NetApp states 10 time faster…vs what?

What do you think about?

 

Regards

 

Da: Sebastian Goetze [mailto:spgoetze@gmail.com]
Inviato: marted́ 23 ottobre 2012 16:46
A: Milazzo Giacomo
Cc: toasters@teaparty.net
Oggetto: Re: 2220 or 2240? Performance issues?

 

Just a reminder:
Don't just count the drives. Imagine the setup.
If you configure the controllers symmetrically they should both have a spare and RAID-DP, leaving you with just 3 data spindles per controller if you go for the 12-disk offer.
If you configure asymmetrically you'll get something like:

So 7 Data spindles, but only one active controller (the other one being idle most of the time, I presume).
7*~250 IOPS = 1.700 IOPS at the spindles...  (The controller shouldn't be the bottleneck...)

I still have an uneasy feeling here...

In conclusion: If you can't afford the 24-disk offer, consider at least an asymmetric configuration!


Sebastian

On 23.10.2012 16:16, Milazzo Giacomo wrote:

Hi all,

 

I’ve a startup project that will expect a very simple Hyper-V 2012 iSCSI cluster. Competitor is an EqualLogic appliance 24x300 10k SAS HDs.

 

There’s a very interesting promo in these days offering a 2220 12x900 SAS at very competitive price vs a 2240-2 24x450 SAS so I was evaluating the 2220.

 

But I’m concerned about performances. The two server nodes will be “only” 32 GB RAM/2 CPU Xeon 8C so I can presume that the number of VM servers will be no more that 7-8

I’ve lab data from NetApp that state, at lab conditions, that for short random ops with iSCSI the 2220 can do roughy 10k IOPS vs the 30k of the 2240-2, for short write they are quite similar (40k IOPS).

For large ops the 2240-2’s performances are very higher that 2220.

In addition to this I’ve also considered that the 2220 will have ONLY 6 mechanics for each controller while the 2240 will have 12 each…

 

What do you think about this little cluster? Can I trust in 2220?

Regards

 

 




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