Cassandra SSTable storage format is changed in 3.0 to support higher level CQL structure directly at Storage engine level. Older format of SSTable was designed to support a very simple model of storing basic key/value pairs which was adequate to support Thrift API. In 2.* and earlier versions of Cassandra, Thrift was predominantly used to define the database schema in the older versions of 2.*. But thrift's column family definition is not sufficient to create tables to store structured applic...
