Re: Oracle on Digital Unix RAID

We are currently running on a RAID 5 system and are having trouble with performance. Oracle and it technologies are not friendly with a RAID 5 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.

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. To Oracle a RAID 5 looks and acts like 1 disk drive, you will have disk contentions, controller contention and user contentions.

If you have any questions, please feel free to e-mail me at bryanle_at_walkerassoc.com.

Thanks....
Bryan Lenihan
DBA-Walker and Associates, Inc.
bryanle_at_walkerassoc.com
http://www.walkerassoc.com/

Luis Santos <lsrelac_at_pobox.com> wrote in article <50cg3v$jju_at_raptor.centroin.com.br>...
> Hello,
>
> I'm a DBA for an Oracle7 Enterprise based on a Digital Unix v3.2C with
> Digital Storage Works RAID system. Currently, we have four 2.1 Gb
> disk. One disk is out of RAID, and the others three are on RAID 5.
>
> My question: Which are, if this configuration, the best file disposal
> of data datafiles, index datafiles, system datafiles, log files,
> control files and archive log destination.
>
> If I bought one or two more disks, do you advice me to put them on or
> out of the RAID?
>
>
>
> Thanks,
>
> --
> Luis Santos
> Relacional Consultoria
> Rio de Janeiro - Brazil
>
>
  Received on Tue Sep 03 1996 - 00:00:00 CEST