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Posted to dev@parquet.apache.org by "Ryan Blue (JIRA)" <ji...@apache.org> on 2015/01/09 23:08:35 UTC

[jira] [Created] (PARQUET-166) Validate parquet row group size and HDFS block size

Ryan Blue created PARQUET-166:
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             Summary: Validate parquet row group size and HDFS block size
                 Key: PARQUET-166
                 URL: https://issues.apache.org/jira/browse/PARQUET-166
             Project: Parquet
          Issue Type: Bug
          Components: parquet-mr
            Reporter: Ryan Blue


The OutputFormat should verify that {{parquet.block.size < dfs.blocksize}} to avoid bad performance. In addition, we could check that {{(dfs.blocksize % parquet.block.size) < 1MB}} to ensure that some number of row groups is approximately the size of an HDFS block.



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