Re: Oracle on Digital Unix RAID
Date: 1996/09/03
Message-ID: <322C8E2B.56F1_at_ix.netcom.com>#1/1
Bryan Lenihan babbled:
>
> We are currently running on a RAID 5 system and are having trouble with
> performance.
Sounds like configuration problems...
> Oracle and it technologies are not friendly with a RAID 5 system.
Bull. The majority of systems out there in industry and big business are running on RAID 5. I've never had any trouble setting up a RAID system.
> We are in the process of seperating our RAID 5 system and setting
> all the disks to a RAID 1 system. This is a costly method, but my company
> wants to have redundant disks for zero downtime.
Redundant disks do not provide zero downtime, there are many factors including disks, but a RAID5 system already provides for redundant disks, that's its job. If you Mirror or Duplex everything, you do not increase your mean time between failure.
> I would recommend that you do not run on a RAID 5 system. Most operating
> systems have a system performace downgrade when using RAID 5.
Only if you use a software version of RAID 5. All my hardware versions kick booty.
> To Oracle a RAID 5 looks and acts like 1 disk drive, you will have disk
> contentions, controller contention and user contentions.
Aha! Now I see your problem. You don't have your database set up correctly. Change your RAID to a RAW partition and READ THE BOOKS on using Oracle with a RAID system. They are very informative: things like how to use dbwr's correctly on the RAID unit.
>> Luis Santos <lsrelac_at_pobox.com> wrote in article
bmartin Received on Tue Sep 03 1996 - 00:00:00 CEST