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The "Operations" page has been changed by AlexisLeQuoc. The comment on this change is: Added instructions to change the replication factor on a live cluster. http://wiki.apache.org/cassandra/Operations?action=diff&rev1=85&rev2=86 -------------------------------------------------- The same options apply to changing replication strategy. Reducing replication factor is easily done and only requires running cleanup afterwards to remove extra replicas. + + To update the replication factor on a live cluster, forget about cassandra.yaml. Rather you want to use '''cassandra-cli''': + update keyspace Keyspace1 set replication_factor = 3; === Network topology === Besides datacenters, you can also tell Cassandra which nodes are in the same rack within a datacenter. Cassandra will use this to route both reads and data movement for Range changes to the nearest replicas. This is configured by a user-pluggable !EndpointSnitch class in the configuration file.
