VMware officially supports (some) long-distance VMotion scenarios
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At the beginning of July virtualization.info reported how VMware, Cisco and EMC (the VCE triumvirate?) are working together to execute virtual machines live migrations across data centers that are 80 km (50 miles) away from each other.
Well, what was considered an impressive yet experimental configuration in July became an officially supported scenario in September.
The three companies discussed three different scenarios for long-distance VMotion at VMworld 2009 and announced the joint validation for one of them, where VMware supports a 200 km live migration (assuming you can satisfy some pretty demanding requirements):