re: ASM performance on storage RAID 1 or RAID 10 devices 2007-04-05 - By Peter Santos
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Guys,
I'm wondering if any of you have had a chance to test ASM performance
against a RAID 10 vs RAID 1 device. This is the concern:
ASM does 1 MB file extent stripping, and so does it make sense to use a raid
device that is also stripped .. specially if the storage cannot strip with
such large strip size?
The question would be, does one get better IOPS and MB/s with ASM against
a raid device that is just mirrored or a raid device that is mirrored and
stripped with
a stripe size that is a multiple of 1MB?
I spoke to an Oracle architect way back about this, and he said it doesn't
really matter, but that if you can strip at the storage level, then you should!
Does anyone have experience testing this? The IO workload that I'm concerned
with
is lots of small random ios + large read-only sequential ios ?
I'm familiar with Oracle's tool Orion for testing IO, but I'm wondering if
anyone has tested this out ?
Any feedback is greatly appreciated!
BTW, my environment is ( SuSe Enterprise 10 x86_64 + 10.2.0.3 + storage
(DS4400 Disk Systems (FAStT 700))
- -peter
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