  Active replication following the state machine replication (SMR) approach is
a way to make existing systems and services more reliable and fault-tolerant.
The additional communication overhead has a negative impact on the system's
throughput and overall request latency. Today's systems should be highly
optimized to their execution environment and usage scenario in order to remedy
the performance loss introduced by such group communication systems (GCS). In
addition to that, systems should be able to adapt to changing environmental
conditions. This report analyzes the available configuration options of three
existing GCSs. Therefore, it explains the available configuration parameters
and describes the given reconfiguration mechanisms. The found parameters are
then classified in a parameter scheme.
