Ensure reliability and fault tolerance by controlling how many data replicas you
want to store across a Cassandra cluster.
The replication factor is the total number of replicas for a keyspace across a Cassandra
cluster. A replication factor of 3 means that there are three copies of each row, where
each copy is on a different node and is equally important.
By setting a high replication factor, you ensure a higher likelihood that the data on the
node exists on another node, in case of a failure. The disadvantage of a high
replication factor is that write operations take longer.
Before you begin: Determine the optimal replication factor setting that
prevents data loss in case multiple nodes in the Cassandra cluster fail. For more
information, see Impact of failing nodes on system stability.
- To change the default replication factor, open the
prconfig.xml file and modify the
The default setting for all keyspaces is