Re: Configuration of the SAN

You should think more in mode of spindles and throughput for your data, and isolation and redundancy for you redo log.

Throughput for redo is good to consider as well.

What you should do with your configuration is dependant on how your system will be used.

Is is read mostly? RAID 5 may be fine.

If it is very write intensive, RAID 5 may not work for you.

You will not know for sure unless you have accurate numbers for the IO requirements of your application.

Or you can setup a test environment, and run the application at real levels via some testing tool.

I *think* this is what you are asking, but the question seemed somewhat vague.

Jared

On Tue, 29 Mar 2005 14:06:17 -0500, Luc Demanche <lucdemanche_at_gmail.com> wrote:
> Jared,
>
> I will have 2 volumes for my redo.
> but my question is not about the number of volumes for redo, it's
> about what should I do with that config.
> RAID-5 for data and index, and RAID-1 for redo and archived ....
>
> Should I put everything on RAID-10 ? I won't have to lose that space
> for my redo and archived b'cause they are the only one on RAID-1.
>
> Thank
> Luc
>
>
> On Tue, 29 Mar 2005 18:58:35 +0000, Jared Still <jkstill_at_gmail.com> wrote:
> > On Tue, 29 Mar 2005 11:41:11 -0500, Luc Demanche <lucdemanche_at_gmail.com> wrote:
> >
> > > I will have a filesystem of 146G to store my redo group of 2G .... what a waste.
> > > Same thing for my redo group 2 and my archived log files ...
> > ...
> > >
> > > What is your LUN configuration regardinf redo log groups and archived
> > > log files ?
> > >
> >
> > 4 RAID 1 volumes for Redo.
> >
> > Redo is software mirrored as well.
> > The belt and suspenders approach.
> > ( Belt and braces for you British folks)
> >
> > What is the point of 3 redo volumes anyway?
> >
> > Archive logs are shipped off to a RAID 10.
> >
> > --
> > Jared Still
> > Certifiable Oracle DBA and Part Time Perl Evangelist
> >
>
> --
> Luc Demanche
> Oracle DBA
> (514) 867-9977
>

-- 
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
--
http://www.freelists.org/webpage/oracle-l