Administrator Guide

Synchronous replication use cases
33 Dell EMC SC Series: Synchronous Replication and Live Volume | CML1064
Intra campus and metro DR sites, cascade topology, Fibre Channel and iSCSI replication
Intra-campus, metro, and remote DR sites; hybrid topology; Fibre Channel and iSCSI replication
The examples in Figure 26 through Figure 30 serve to represent physical hosts or virtual machines. Some
notable details in the examples are:
• A 1U DSM server is racked at each recovery site to facilitate DR testing and cutover automation
through DSM, VMware Site Recovery Manager, or both. The DSM shown is for logical representation
only. DSM may be a virtual machine.
• SC Series storage supports Fibre Channel and iSCSI-based replication.
• SC Series storage supports asynchronous replication as well as multiple modes of synchronous
replication.
• Either mode of synchronous replication latency will impact production applications relying on the
replication source volume. The infrastructure design should be sized for adequate replication
bandwidth, controllers, and storage at the recovery site to efficiently absorb throughput.
• The examples provide adequate hardware and data center redundancy at the recovery site when
implementing high consistency synchronous replication. Aside from a pause operation, unavailability
of a destination replica volume leads to unavailability of the source volume and will result in a
production application outage.