ConfigurationException replication factor is an option for SimpleStrategy not NetworkTopologyStrategy

Question

I created one keyspace in cassandra, now I want to alter strategy property from SimpleStrategy to NetworkTopologyStrategy. But I am getting the below given error.

$ create keyspace University with replication = {'class' :'NetworkTopologyStrategy','replication_factor':1};
ConfigurationException: replication_factor is an option for SimpleStrategy, not NetworkTopologyStrategy

Thank You

Answer 1

Hi@akhtar,

In cassandra there are two types of Strategy available. One is SimpleStrategy and another one is NetworkTopologyStrategy.

In SimpleStrategy, replication_factor field is available. But, in NetworkTopologyStrategy, DataCenter field in available.

Use the bellow given command, it will work.

$ create keyspace University with replication = {'class' :'NetworkTopologyStrategy','DataCenter1':1};

Thank You