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https://issues.apache.org/jira/browse/DRILL-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15975809#comment-15975809
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Padma Penumarthy commented on DRILL-5379:
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Try this and let me know if it works.
https://github.com/ppadma/drill/commit/317d2657b652ec4d759998ee2828c49476318f9f
This will create files with blockSize configured in the system option
`store.parquet.block-size`. Just make sure it is a multiple of 64K.
> Set Hdfs Block Size based on Parquet Block Size
> -----------------------------------------------
>
> Key: DRILL-5379
> URL: https://issues.apache.org/jira/browse/DRILL-5379
> Project: Apache Drill
> Issue Type: Improvement
> Components: Storage - Parquet
> Affects Versions: 1.9.0
> Reporter: F Méthot
> Fix For: Future
>
>
> It seems there a way to force Drill to store CTAS generated parquet file as a
> single block when using HDFS. Java HDFS API allows to do that, files could be
> created with the Parquet block-size set in a session or system config.
> Since it is ideal to have single parquet file per hdfs block.
> Here is the HDFS API that allow to do that:
> http://archive.cloudera.com/cdh4/cdh/4/hadoop/api/org/apache/hadoop/fs/FileSystem.html#create(org.apache.hadoop.fs.Path,%20boolean,%20int,%20short,%20long)
> http://archive.cloudera.com/cdh4/cdh/4/hadoop/api/org/apache/hadoop/fs/FileSystem.html#create(org.apache.hadoop.fs.Path,%20boolean,%20int,%20short,%20long)
> Drill uses the hadoop ParquetFileWriter
> (https://github.com/Parquet/parquet-mr/blob/master/parquet-hadoop/src/main/java/parquet/hadoop/ParquetFileWriter.java).
> This is where the file creation occurs so it might be tricky.
> However, ParquetRecordWriter.java
> (https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/ParquetRecordWriter.java)
> in Drill creates the ParquetFileWriter with an hadoop configuration object.
> something to explore: Could the block size be set as a property within the
> Configuration object before passing it to ParquetFileWriter constructor?
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