Re: Oracle9i, RAC on linux - server hardware recommendation

Hans Forbrich <news.hans_at_telus.net> wrote in message news:<N4wbd.2418$cr4.857_at_edtnps84>...
> Keg wrote:
>
> > You don't want a NetApp for your storage, that is NFS (unless they
> > have changed recently) You cannot store Oracle datafiles on NFS
> > because writes are not guaranteed (plus the performance would be
> > utterly horrible and negate any reasons for moving to RAC). Shared
> > storage means external storage that is locally mapped to both systems
> > (or several systems). This could be a SAN (as opposed to NAS which is
> > what the NetApp's are) or merely a collection of disks with Fibre
> > connections to each host. The key concept is 'locally' attached so the
> > disk devices appear as local devices to each system/OS. Also the
> > oracle datafiles will need to be on raw devices. The NetApp uses its
> > own filesystem (I believe ext3) and exports via NFS. As of the last
> > time I looked at them, the NetApp's were basically 'NFS in a box' with
> > a tweaked OS, but underneath, it is likely Linux or FreeBSD serving up
> > NFS.
>
> True once upon a time. Times have changed.
>
> NetApp provides guaranteed writes in it's NFS configuration and has
> apparently worked very closely with Oracle to get Filer working in a
> supported and stable config.

http://www.netapp.com/tech_library/ftp/3189.pdf

>
> SO your concern is no longer valid - for NetApp products. But true for most
> implementations of NFS.
>
> /Hans

jg

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