Dell PowerVault MD Series Storage Arrays Storage Replication Adapter (SRA) Best Practices Guide (Client)

With added support for Remote Replication over iSCSI protocol, greater replication distances are now possible. However, this improvement in replication distances impacts latency (compared to earlier Fibre Channel-only support). Therefore, take careful consideration during Datastore creation to ensure that only data that must be replicated is included on the virtual disks you replicate. After replication begins, closely observe the amount of data being replicated and the time it takes to synchronize data. If the amount of time required to synchronize data is more than the synchronization interval, a remote replication group becomes degraded and nonfunctional.