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The "DataModel" page has been changed by jeremyhanna: https://wiki.apache.org/cassandra/DataModel?action=diff&rev1=38&rev2=39 The first component of a table's primary key is the partition key; within a partition, rows are clustered by the remaining columns of the PK. Other columns may be indexed independent of the PK. This allows pervasive denormalization to "pre-build" resultsets at update time, rather than doing expensive joins across the cluster. + + A blog post by committer Tyler Hobbs that gives [[http://www.datastax.com/dev/blog/basic-rules-of-cassandra-data-modeling|Basic Rules of Cassandra Data Modeling]]. !DataStax has a [[http://www.datastax.com/documentation/cql/3.1/cql/ddl/ddl_intro_c.html|good introduction to data modeling in Cassandra here]].
