Hi Tim,   I have the similar issue, within one single partition, there are multiple small files. I already followed the similar solution you suggested, however the number of files did not reduced, infact increased. Here is the link to my question with profile and other details. The blocksize I kept was 256 MB.    http://community.cloudera.com/t5/Interactive-Short-cycle-SQL/Insert-query-with-NUM-NODES-1-generating-too-many-Parquet-files/td-p/34207/jump-to/first-unread-message    Please advise, Thanks Amit ... View more