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Not sure how you would mirror disks located in two separate
datacenters :-)
http://tinyurl.com/b2pd9qh
That's a link to cross-site mirroring in the IBM i Information Center, if interested.
We need a share nothing type of solution like what is shown
in those diagrams I showed in the MS SQL examples.
Those workflows look like a kluge for a base runtime (MS SQL Server) which can't scale vertically. So they try to come up with a workflow that scales horizontally. Are you sure you "need" that?
User issues INSERT statement on SERVER A,
it gets replicated to SERVER B.
All IBM i HA products do that; via remote journaling; via local or remote disk mirroring.
If user issues INSERT on SERVER B, it gets replicated to SERVER A.
AFAIK the only reason you might need this might be for a horizontal scaling. The IBM i answer is to add more cores and scale vertically. NOBODY really likes duplicating database tables across servers. Again, IBM i scales vertically, without the hassle.
-Nathan.
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