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Keyspaces

In Cassandra, the keyspace is the container for your application data, similar to a schema in a relational database. Keyspaces are used to group column families together. Typically, a cluster has one keyspace per application.

Replication is controlled on a per-keyspace basis, so data that has different replication requirements should reside in different keyspaces. Keyspaces are not designed to be used as a significant map layer within the data model, only as a way to control data replication for a set of column families.

  CREATE KEYSPACE keyspace_name WITH
strategy_class = 'SimpleStrategy'
AND strategy_options:replication_factor='2';

CREATE KEYSPACE keyspace_name WITH
placement_strategy = 'SimpleStrategy'
AND strategy_options = {replication_factor:2};