topic eva performance~ in Disk Enclosures

eva performance~

???_185 — Wed, 19 Oct 2005 00:15:46 GMT

I'll use eva3000 soon.The configuration is 2C1D. the sum of disk is 1of 10k and 146G.
disk is connected with 2Gb switch.
1. At a appearence, how can I distinguish sata disk and fata.
and, I found disk performance of eva3000 is that Sustained I/O and MB Throughput Up to 141K IOPS and up to 700MB/s throughput per Controller Pair on document.
2. How can I interpret this 141K IOPS AND 700MB/s and if send 1G data same disks, how does it speed per second?

Re: eva performance~

Uwe Zessin — Wed, 19 Oct 2005 01:32:47 GMT

The EVA does not use SATA disk drives - either FC/SCSI or FATA (something like FC/ATA).

Please realize that you will *NEVER* have that performance with just 14 disk drives! You better give use a pointer to that document, because I think I can safely claim that you will *NEVER* be able to reach these values with an EVA3000.

Re: eva performance~

???_185 — Thu, 20 Oct 2005 02:08:11 GMT

I read serveral eva performance issue~
could you refer to this forum.
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=942822
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=960358

Re: eva performance~

Uwe Zessin — Thu, 20 Oct 2005 03:32:01 GMT

I have seen them and I still maintain that expecting 141K IOPS AND 700MB/s (the specifications say 335MB) in production use is being unrealistic. I bet both values have been obtained using different, specifically tuned benchmarks making heavily use of the cache.

141000 IOPS / 56 disks ~= 2517 IOPS/disk

Show me a single mechanical disk drive that can deliver that in a real-life situation!

Those values are only good to show how powerful the controller is.

Re: eva performance~

???_185 — Thu, 20 Oct 2005 19:23:00 GMT

I am so sorry.I don't understand what does
single mechanical disk means?

Re: eva performance~

Uwe Zessin — Thu, 20 Oct 2005 23:40:15 GMT

What I meant is:
those high IOPS and MB/s values cannot come from physical disk I/O only - there is heavy caching (use of silicon memory inside the controllers) being used.