Re: Oracle Clusters

RAID 5 performs poorly for small reads and small writes. If you must use RAID 5, get the biggest cache on the controller that you can afford.

Mirrors of stripe sets (RAID 0+1) give the best performance and redundancy except the cost is high.

Christopher Weiss
Professional Services Division
Compuware Corporation

Sybrand Bakker <postbus_at_sybrandb.demon.nl> wrote in message news:927656618.11290.0.pluto.d4ee154e_at_news.demon.nl...
> Hi Matt,
> The options are AFAIK to use Oracle Failsafe 2.1 on top of Microsoft
Cluster
> Server 1.x
> With Oracle 8 you should be able to configure sqlnet for both failover and
> load balancing.
> The main problem about Raid 5 is the parity check involved with each
write.
> This will hit most when the redolog files are on RAID 5 devices. You could
> make a mix of Raid 0+1 for redolog and Raid-5 for the other parts of the
> databases.
>
> Hth,
>
> Sybrand Bakker, Oracle DBA
>
>
> Matt Randle wrote in message
> <927655676.11939.0.nnrp-09.d4e48d0d_at_news.demon.co.uk>...
> >We are writing an Oracle application on NT. Does anyone know what the
> >options are for clustering ??
> >
> >By this I mean,
> >
> >Can you cluster + load balance instances of the Oracle server application
> >running on NT ??
> >
> >What are the options for providing physical data redundancy (ie RAID).
> I've
> >heard RAID5 is not good because it means you can't locate tablespaces on
> >seperate physical hard drives. Are there any complete 'replication'
tools
> >??
> >
> >Thanks,
> >
> >Matt.
> >
> >
>
>
Received on Tue May 25 1999 - 15:47:57 CDT