This Ready Solution uses Dell EMC Symmetrix Remote Data Facility (SRDF) software for disaster recovery and data mobility. SRDF software replicates data between two, three, or four arrays located in the same room, on the same campus, or thousands of kilometers apart. SRDF replication modes include:
- SRDF synchronous (SRDF/S)―SRDF/S replication maintains a real-time copy at arrays that are located within 200 kilometers. The local array acknowledges writes from the production host when they are written to cache at the remote array.
- SRDF asynchronous (SRDF/A)―SRDF/A replication maintains a dependent write-consistent copy at arrays at unlimited distances. The local array immediately acknowledges writes from the production host, and, therefore, replication has no impact on host performance. Data at the remote array is typically only seconds behind the primary site.