I am here at EMC world and I have finally grasped the concept of VPLEX after attending the 2 hour Vplex hands on lab. VPLEX is the big buzz here at EMC world and to make it simple to understand, it is virtual raid that can go beyond the datacenter as well as also being storage agnostic. You simply carve up storage and present it to the vplex, the vplex then will claim storage from the backend and it will present it to your servers. You will claim storage from one SAN, claim storage from a different san (it could be in the same data center or at another data center within synchronous distance) and then you raid the storage together. When you svmotion a server between storage and even sites, the data is already there so it looks like it moves from site to site within seconds.
Some of the key points are:
It is active/active, very resilient
It can support 8000 virtual volumes per vplex cluster
the maximum lun size tested by EMC is 32 TB
They recommend using 8 gig fiber between vplex devices
It can support a maximum of 5 ms latency
the easiest migration path is through SVMotion (assuming you are fully virtual, like me)
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