Hi,
I'm in that horrible place where I thought I was clear and suddenly I'm doubting all that was good in my head. Now it hurts.
To paint the scenario: (this is not yet in production)
2 physical datacentres. There are HW load balancers in place, each site has a leased line reliable v.low latency connection PLUS a point to point stretched vlan. These sites both contain DC's for the single domain and are listed under Sites & Services. The majority of users are spread across the county in small satellite sites (Their subnets are sporadically assigned to a site)
Exchange 2010 is to be Active\Active, 4 servers in each datacentre. In each datacentre, the 4 servers roles will be CAS\MB, CAS\MB, HT\MB, HT\MB.
Each MB server will have active, passive & a passive copy of the other datacentres' active DBs.
So.....
A mailbox is associated a CAS-ARRAY in site 1
Site 1 shuts down.
I assume that as the DR copy becomes Active it will still be associated to the site 1 CAS-ARRAY - therefore no-one can connect. Is there a way of setting a DB copy to a different CAS-ARRAY that its' seed?
Originally, I thought that I could create a single org-wide cas array that contained the CAS servers from each site. Traffic would then be load balanced to the members IPs at the HW LB level. All DBs would be associated to the single CAS-ARRAY. But from what I've read, a stretched CAS-ARRAY isn't recommended.
Any help is clearing my head would be greatly appreciated.
Many thanks