Re: choosing RAID level for xlogs - Mailing list pgsql-performance

From Vivek Khera
Subject Re: choosing RAID level for xlogs
Date
Msg-id 32D5016B-C7E3-4EEC-AA03-A924521F1DE8@khera.org
Whole thread Raw
In response to Re: choosing RAID level for xlogs  ("Anjan Dave" <adave@vantage.com>)
List pgsql-performance
On Aug 16, 2005, at 2:37 PM, Anjan Dave wrote:

> Yes, that's true, though, I am a bit confused because the Clariion
> array
> document I am reading talks about how the write cache can eliminate
> the
> RAID5 Write Penalty for sequential and large IOs...resulting in better
> sequential write performance than RAID10.
>

well, then run your own tests and find out :-)

if I were using LSI MegaRAID controllers, I'd probalby go RAID10, but
I don't see why you need 6 disks for this... perhaps just 4 would be
enough?  Or are your logs really that big?


Vivek Khera, Ph.D.
+1-301-869-4449 x806



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