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08-18-2009 05:10 AM
08-18-2009 05:10 AM
I have collected data with EVAPerf and the EVA shows an average of 7500 total host KB/s and a average total Req/s of 1000. The costumor is complaining about the performance.
thanks
Solved! Go to Solution.
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08-18-2009 01:35 PM
08-18-2009 01:35 PM
SolutionUp to 141K IOPS and up to 335 MB/s throughput per Controller Pair
Of course that's the limit of the controllers CPU and RAM, the real limit is the type and number of disks.
On EVAperf you should look at the read and write latencies on the vdisk or disk group involved.
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08-19-2009 01:04 AM
08-19-2009 01:04 AM
Re: Maximum total host KB/s for the EVA4000
The concerning vdisk has a much higher read/write latency in relation to the other vdisks.
What does it mean? An OS related problem?
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08-19-2009 01:10 AM
08-19-2009 01:10 AM
Re: Maximum total host KB/s for the EVA4000
If this vdisk has the 90% of the traffic, it will have more latency than the others.
Check this page:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01671044
Multiply by the number of disks on your disk group, compara that to the number of I/Os on the disk group.
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08-19-2009 01:39 AM
08-19-2009 01:39 AM
Re: Maximum total host KB/s for the EVA4000
but what counter in EVAPerf for the diskgroup indicates the IOPS, the req/s?
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08-20-2009 02:44 AM
08-20-2009 02:44 AM
Re: Maximum total host KB/s for the EVA4000
if i use the following formule:
MBâ sec = IOPs à ALLOCATION_UNIT_SIZE_IN_MB
4648 * allocation size (64K) that i have about 300 MB/s
Is this correct?
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08-20-2009 04:16 AM
08-20-2009 04:16 AM