Compressed Replication
The compressed replication feature improves performance when replicating compressible data between source and target sites that have limited bandwidth. Before a replication stream is sent to the target, it is automatically compressed at a rate based on current CPU utilization and network I/O throughput. The replication stream is then decompressed when received by the replication target. If any part of the data is not compressible, that portion will be sent as if compression were disabled.
All replication streams will be compressed, unless you explicitly disable compression. If your WAN equipment provides compression, for example through a WAN accelerator, disable the compression feature by following the procedure Disabling Replication Compression BUI, CLI.
The source appliance and replication target require software version 2013.1.4.0 (or later) to
support replication compression. If the target has an earlier version, a warning icon 
is displayed next to the target name. You will need to update the
replication target to the minimum version.
You can view replication performance statistics on the source appliance, under the progress bar for the replication.
