Bigdata SQL: Parquet Files

As with RC and ORC, the Parquet format also allows compression and  improved query performance benefits and is generally slower to write.  Unlike RC and ORC files, Parquet supports limited schema evolution. New columns can be added to an existing Parquet format. Parquet is supported by Cloudera and is optimized for Cloudera Impala. Native Parquet support is rapidly being added for the rest of the Hadoop and Spark ecosystem.