cluster:

  • Cluster is a collection of multiple data centers.
cassandra cluster node

Node:

  • Cassandra is a distributed database management system designed to handle large amounts of data across many commodity servers.
  • Like all other distributed database systems, it provides high availability with no single point of failure.
  • Is a machine where Cassandra is running.
cassandra ring with vnodes

keyspace:

  • A keyspace in Cassandra is a namespace that defines data replication on nodes.
  • A cluster contains one keyspace per node. Given below is the syntax for creating a keyspace using the statement CREATE KEYSPACE.
  • It is similar to a database in Relational Database Management System, which is a group of tables, also called column families in Cassandra.
CREATE KEYSPACE <identifier> WITH <properties>

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