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The "FAQ" page has been changed by JonHermes. http://wiki.apache.org/cassandra/FAQ?action=diff&rev1=83&rev2=84 -------------------------------------------------- Yes, but it will require restarting and running repair manually to change the replica count of existing data. * Alter the ReplicationFactor for the desired keyspace(s) in the storage configuration on each node in the cluster. - * Restart cassandra on each node in the cluster + * Restart cassandra on each node in the cluster. If you're reducing the ReplicationFactor: - * Run "nodetool cleanup" on the cluster to remove surplus replicated data. + * Run "nodetool cleanup" on the cluster to remove surplus replicated data. Cleanup runs on a per-node basis. If you're increasing the ReplicationFactor: - * Run "nodetool repair" to run an anti-entropy repair on the cluster. This is an intensive process so may result in adverse cluster performance. + * Run "nodetool repair" to run an anti-entropy repair on the cluster. Repair runs on a per-node basis. This is an intensive process that will result in adverse cluster performance. It's highly recommended to do rolling repairs, as an attempt to repair the entire cluster at once will most likely swamp it and may even kill it. <<Anchor(large_file_and_blob_storage)>>
