ConfigurationException: replication_factor is an option for SimpleStrategy, not NetworkTopologyStrategy

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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

Apr 1 in Big Data Hadoop by akhtar
• 11,270 points
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1 answer to this question.

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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

answered Apr 1 by MD
• 24,500 points

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