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Home -> Community -> Usenet -> c.d.o.misc -> Re: oracle on a raid type system
I agree. I used to have comparison info on this but... Some people use RAID 5 because you get fault tolerance and you only lose n-1 disks for parity, but pay a little more for writes. With RAID 10 (or 0+1), you lose 50% of the disks immediately for mirroring, but get good performance with the striping. The problem I have is I work on Oracle 7.3.4 and AIX 4.3.1. I'm told it can't do RAID 10 or 5 (performance problems). I get a choice of 0 or 1 but not both. I choose to mirror and stripe tablespaces across the drives, which is better than nothing but a pain. I still can't guarantee that multiple drives will be used to handle large i/o requests. Oracle 8's partitioning would help, but I wish we'd switch to SUN (or another vendor) or IBM would support mirroring or striping.
Steve
Steve Foley wrote:
I have heard raid-5 is badness. Too much time spend calculating parityReceived on Sat Jan 23 1999 - 13:32:05 CST
slows down writes. Raid 0 + 1 (striping and shadowing) is what we are
using, but system is not live yet.J Holden <jholden@voyager.net> wrote in article
<78am2u$cqh@news.voyager.net>...
> I have always been told that it is not best to have Oralce on a raid
> type system, but I havent been able to find anything to show people
> who ask me why. I kind of understand why, but was wondering where a
> good place to look to find information on this would be. Or is what I
> have been told not entirely accurate?
>
> Thanks
>
> Jeff
>
>
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