Re: ASM setup

From: macdba321 <>
Date: Mon, 28 Apr 2008 10:54:13 -0700 (PDT)
Message-ID: <>

On Apr 28, 12:45 pm, hpuxrac <> wrote:
> On Apr 28, 10:26 am, macdba321 <> wrote:
> > Hi all,
> > I'm setting up my first ASM based database ever. (Just for testing
> > and learning, NOT for production). I only have 3 physical disks in the
> > ASM disk group. (4 total physical disks in the server).
> > I am loading the OS (Windows 2003 server) on one physical disk as
> > well as the Oracle installation. I am keeping the other 3 disks raw
> > for ASM.
> > Should I RAID the 3 raw disks (hardware RAID and/or Oracle raid) or
> > just let Oracle do what it wants with them?
> > Thanks!
> What most people do in the real world ( the ones actually using ASM
> anyhow ... not a large percent yet of the oracle installed base ) is
> basically this.
> If your storage environment supports RAID well then they get LUNs from
> it and define the ( LUNs become disks in an ASM diskgroup ) diskgroup
> as external redundancy.
> This tells ASM hey don't bother doing any overhead of mirroring the
> extents you allocate across disks ... my storage environment does a
> nice job of dealing with that stuff.
> If the storage environment doesn't support RAID then they point ASM at
> disks and let ASM do the mirroring, You have a choice of 2 or 3 way
> mirroring to add additional protection levels.
> So all in all this design is up to you ... perhaps it should be based
> on the type of testing that you want to do and how that relates to an
> eventual production environment that you might be running in
> eventually.
> There's a book that you might want to think about getting "Oracle
> Automatic Storage Management" it's one of those Oracle Press books
> authors are Vengurlekar, Vallath and Long includes 10g and 11g.
> Personally I recommend getting and reading that book ( it really isn't
> that long ) and spending a day or 2 reading it before you make more
> decisions about your setup.

Hello, apologies if you receive this reply twice (It didn't reply successfully the 1st time).

I just got the book you recommended and am playing with the database server as I go along for fun (since for once I have time on my hands).

The database server has 3 raw disks for me to "play" with.

This is 100% academic/fun. There is ZERO need for High Availability/ redundancy. If I lose a drive, oh well, I start over. It doesn't matter.

One quick question:

If you wanted to set it up for 100% performance/speed, would you:

  1. Hardware-based RAID-0 the 3 raw disks as 1 ASM disk group,
  2. Oracle-based RAID-0 the 3 raw disks for ASM
  3. Some other RAID level?
  4. Other???

Thanks!!!!!!! Received on Mon Apr 28 2008 - 12:54:13 CDT

Original text of this message