Re: ASM Question - Best Practice
Date: Fri, 06 Jun 2008 09:48:22 -0700
> On Jun 2, 8:23 pm, Michael Austin <maus..._at_firstdbasource.com> wrote:
>> Palooka wrote: >>> Our application will likely use Oracle 10g (probably 10.2.0.4) on AIX >>> v6, using an EMC Symmetrix SAN. The environment doesn't exist yet - we >>> are at the planning stage. >>> The intention is to use ASM. So first question: The mirroring can be >>> done within ASM; i.e. by Oracle, or we can do it at the SAN level. >> The answer is - it depends on your requirements for redundancy. You can >> do both if you like. You could configure your "mirrors" via Oracle >> ASM and point them to two different arrays that can utilize any level >> RAID-0, RAID0+1 or RAID-5 redundancy - depending on how many spindles >> you want to use which translates to what ever your budget can handle.
> Most any competent company that has a storage system that does RAID
> well uses external redundancy for ASM.
> This sounds like you made up your answer.
> The mirroring that ASM "can do" is mostly applicable to environments
> with cheaper disk subsystems.
Hardly a made up answer. I can, within a few minutes of my office, take you to amazingly large publicly held companies with very expensive arrays doing precisely what Michael stated.
>> Best Practice at most companies will vary depending on the criticality >> of the data being stored.
> Is that some kind of mantra?
It is a simple statement of fact.
-- Daniel A. Morgan Oracle Ace Director & Instructor University of Washington damorgan_at_x.washington.edu (replace x with u to respond) Puget Sound Oracle Users Group www.psoug.orgReceived on Fri Jun 06 2008 - 11:48:22 CDT