extended RAC 11gr2 on AIX 5.3

Hi
We are in the initial stages of implemeting RAC across two datacentres(< 2miles) i,e one node in site A and the other in site B having  SAN at each site.How is it different in installation then regular RAC? and what additional components do i need for this?How is data replicated/mirrored between these two sites ?Any oracle documentation for implementing this on 11gr2 AIX?Please any inputs would be valuable.

Thanks
syed_dbaAsked:
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sdstuberConnect With a Mentor Commented:
assuming you can maintain an interconnect across 2 datacenters and your san response/read/write times are fast enough at both sites then there is no difference.

Remember,  RAC does not have data replication.  RAC is ONE database,  with multiple instances.

If you want 2 databases,  that's not RAC
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syed_dbaAuthor Commented:
Needed more guidance on this than provided.
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