Konstantin,
You can modify the RF of the keyspace with following command in cassandra-cli:
update keyspace KEYSPACE_NAME with storage_options = {replication_factor:N};
When you decrease RF, you need to run nodetool clean on each node.
When you increase RF, you need to run nodetool repair on ea
We are setting up my application around Cassandra .8.0 (will move to
Cassandra 1.0 in the near future). In production the application will
be running in a two (or more) node cluster with RF 2. In development,
we do not always have 2 machines to test on, so we may have to run a
Cassandra cluster con
