------------------------<snip>--------------------------
I'm afraid I must respectfully disagree with the collective wisdom of the group
:-)
The most technically correct answer to your questions is: it depends.
We used to do the controller to controller method (IBM's PPRC), but have
recently implemented IBM's XRC. XRC requires a live operating system running
at the remote site to manage the replication.
------------------------<unsnip>---------------------------
Not true; XRC can be "driven" from either end. We evaluated both
possibilities and found that having the DataMover at the remote site was
more cost-effective than running it locally, thanks to services provided
at the remote site by our DR provider.
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