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The "Operations" page has been changed by MakiWatanabe: http://wiki.apache.org/cassandra/Operations?action=diff&rev1=98&rev2=99 Comment: Update cli command syntax to change replication factor To update the replication factor on a live cluster, forget about cassandra.yaml. Rather you want to use '''cassandra-cli''': - . update keyspace Keyspace1 with replication_factor = 3; + . update keyspace Keyspace1 with strategy_options = {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.
