Home > Storage > Unity XT > Virtualization, Cloud & Applications > Dell EMC Unity: VMware vSphere Best Practices > Synchronous replication
Dell Technologies recommends including a flash tier in a hybrid pool where synchronous replication will be active.
Synchronous replication transfers data to the remote system over the first Fibre Channel port on each SP. When planning to use synchronous replication, it may be appropriate to reduce the number of host connections on this port. Additional information can be found in