Lincoln Dale wrote:
I suggest you talk to some of the folks you work with that have to deal
with
synchronous replication.
In the world of storage networking & synchronous I/O, typically anything higher than 1 msec round-trip latency is too high.
True, but 2ms latency in syncing a backup system is much better than 1 month complete loss of service due to *poor* continuity planning. We all know what the next big threats are (nuclear and/or biological), is it worth the risk that the next (and there will be) event is small enough not to affect an area 65 miles across?
Once again, I suggest you talk to the folks you work with that deal with replication. My experience is that "large NY financials" do both sync replication for <90 miles and then async replication to a third tertiary location that is 200+ miles away. Not sure I agree with your on where you think the next big threats are .. but I don't think we could discuss that with any signal:noise ratio! cheers, lincoln.