The following functions are available for local replication (also called: remote copy):
For ETERNUS DX/AF, the REC (Remote Equivalent Copy) functions
For Symmetrix/VMAX3, the SRDF product family
As remote replication is operated independently of the storage system's operating system version, every application can use this function.
Remote replication enables the data which is important for business operations to be made available quickly if, for example, the local storage system or the complete local Data Center is not available because it has crashed or a disaster has occurred.
If a storage system crashes, the current data (when synchronous replication mode is used) always also exists on the remote storage system. As far as data is concerned, this means that after a failure:
the current data does not have to be reimported
no check is necessary to determine whether the backups are usable or consistent
there is no need to roll back to an obsolete status
REC (Remote Equivalent Copy) for ETERNUS DX/AF
REC creates (additional) copies of the application data of a local storage system in other remote storage systems. This makes sense in particular for high availability, disaster protection and migration scenarios.
A detailed description of this function is provided in the chapter "Remote replication with REC (ETERNUS DX/AF)".
REC offers:
Synchronous replication to one or more remote storage systems.
Asynchronous replication between storage systems with and without guaranteed data consistency.
Remote copy configurations supported:
Remote copy pairs (single remote copy configuration)
Concurrent remote copy pairs (multiple simultaneous replications)
Cascaded remote copy (multiple cascaded replications)
Switched remote copy (SAN connection)
SRDF (Symmetrix Remote Data Facility) for Symmetrix/VMAX3
EMC's SRDF product family supports replication of data of a local storage system to one or more remote storage systems.
A detailed description of this function is provided in the chapter "Remote replication with SRDF (Symmetrix/VMAX3)".
SRDF offers:
Synchronous replication to one or more remote storage systems.
Asynchronous replication between storage systems with cross-volume data consistency
Remote copy configurations supported:
Remote copy pairs (single remote copy configuration)
Concurrent remote copy pairs (multiple simultaneous replications)
Cascaded remote copy (cascaded replications)
Switched remote copy (SAN connection)