[CentOS] looking for RAID 1+0 setup instructions?
rswwalker at gmail.com
Sun Aug 30 17:11:57 UTC 2009
On Aug 30, 2009, at 1:02 PM, Götz Reinicke <goetz.reinicke at filmakademie.d
> Miguel Medalha schrieb:
>>> what is your purpose with this Level? I'm asking because I had
>>> done some
>>> raid level tests some time ago with hardware raid controllers/
>>> from 3ware, sun and iscsi-raidsystems and some softwareraid setups.
>> The purpose of using RAID 10 is, of course, performance coupled with
>> full redundancy.
>>> I haven't seen significant performance differences using different
>>> levels. (I'm not comparing the controllers.)
>> Did you test RAID 10 also?
>> I am using software RAID 10 with CentOS 5.3 and I surely did see a
>> *huge* performance increase with RAID 10 compared to RAID 1 only.
> I tested 1+0 vers 0+1 vers 5 on the 3ware, the sun build in raid
> and using softwareraid on an other (older) server.
> On the iscsi systems and the 3ware controller I tested raid 5 vers.
> 6 as
> May be I should have mentioned that.
> My conclusion on my systems was:
> Level 5 is the best concerning performance/capacity.
Then you were only testing sequential io an that only gets you so far.
For random io nothing beats RAID10.
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