EMC has many ways to replicate SAN data. Here is a short list of some of the technology and where they're used:
- MirrorView requires 10 to 20% overhead to operate. So if you have 10TB of data to replicate you are going to need an additional 1 to 2TB of storage space on your production array.
- Celerra Replicator can require up to 250% overhead. This number can vary depending on what you are replicating and how you plan to do it. This means that 10TB of replicated data could require an additional 25TB of disk space between the Production and DR arrays.
- While RecoverPoint is certainly used as a replication technology it provides much more than that. The ability to roll back to any point in time (similar to a Tivo) provides the ultimate granularity to DR. This is accomplished via a Write Splitter that is built in to Clariion arrays. RecoverPoint is also available for non-EMC arrays.
- RecoverPoint can be deployed in 3 different configurations, CDP (local only/not replicated), CRR (remote) and CLR (local and remote).