Re: ASM IO distribution on a SAN
- From: "LS Cheng" <exriscer@xxxxxxxxx>
- To: ryan_gaffuri@xxxxxxxxxxx
- Date: Thu, 13 Sep 2007 08:29:35 +0200
You might test disabling SAN read cache but enabling write cache to get a
better performance
Thanks
--
LSC
On 9/13/07, ryan_gaffuri@xxxxxxxxxxx <ryan_gaffuri@xxxxxxxxxxx> wrote:
>
> The Oracle docs state that ASM can perform striping and mirroring. If I
> use ASM on a SAN how is it able to stripe? All it will see are mount points?
> My understanding is that it is possible create LUN(logical Units) and map
> them to individual disks or sets of disks and then possibly map those to
> mount points. Would this make it easier for ASM to handle IO distribution?
>
> The project I am working will fully deploy with 5 billion inserts(all bulk
> loads using external tables) and have 4 million OLTP type queries/day
> (average query returns over 100 rows, but they are all index scans and the
> queries are not that complex). No updates or deletes.
>
> I am trying to find ways to optimize our physical IO. We are using RAC so
> if I need more CPU we can add nodes.
>
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