Hi,
> Does Hive LLAP work with Parquet format as well? LLAP does work with the Parquet format, but it does not work very fast, because the java Parquet reader is slow. https://issues.apache.org/jira/browse/PARQUET-131 + https://issues.apache.org/jira/browse/HIVE-14826 In particular to your question, Parquet's columnar data reads haven't been optimized for Azure/S3/GCS. There was a comparison of ORC vs Parquet for NYC taxi data and it found that for simple queries Parquet read ~4x more data over the network - your problem might be bandwidth related. You might want to convert a small amount to ORC and see whether the BYTES_READ drops or not. In my tests with a recent LLAP, Text data was faster on LLAP on S3 & Azure than Parquet, because Text has a vectorized reader & cache support. Cheers, Gopal
