Richard wrote:
> I'm searching for opinions on disaster proofing options in Oracle,
> particularly those involving wide separation of server nodes, in
> different data centres.
>
> I know this can be done using replication and DataGuard but I wondered
> about RAC. There are a couple 'wide area' clustering products
> available, notably OpenVMS and some third party applications for
> Linux. They appear to allow 'shared nothing' clusters to be created
> where individual nodes are not connected to a shared disk array, as is
> usual with RAC.
>
> Is anybody aware of these products being used to create 'wide area'
> RAC clusters? If so I'd be interested to hear opinions.
You can do extended clusters with Oracle RAC but not with shared nothing
and you must keep in mind the 1ms/30 mile latency issue. Until network
performance improve distances are limited.
--
Daniel A. Morgan
University of Washington
damorgan_at_x.washington.edu (replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org
Received on Tue Jun 26 2007 - 10:29:15 CDT
