Re: RAC

hjr.pythian_at_gmail.com wrote:
> A shared storage technology is a prerequisite for RAC.

Yes, I do have the physical shared storage by means of dual-ported controller.. etc.

My main issue is that will a clustered file system be required for the database/control/data files if there is ASM available for the raw shared storage? Does ASM handle the functions of a clustered file system such as coherent/ lock synchronized file access with regard to database centric files? Do you require ASM+CFS or just ASM?

Thanks

>

> There are three possible shared storage technologies.
>
> 1. Raw
> 2. ASM
> 3. A cluster file system
>
> Oracle provide (2) and OCFS2 is their offering in respect of (3),
> though 3rd party commercial cluster file systems are of course
> available.
>
> You can't do RAC without picking one of these options, but you are not
> obliged to pick option 3.
>
> The Oracle Clusterware installation will detect which shared storage
> technology is in use and will respond appropriately. But if it doesn't
> detect one or other of these three options, it will complain loudly
> and refuse to proceed.
>
Received on Mon Aug 13 2007 - 10:43:04 CDT