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https://issues.apache.org/jira/browse/DRILL-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16014795#comment-16014795
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ASF GitHub Bot commented on DRILL-5379:
---------------------------------------
Github user ppadma commented on a diff in the pull request:
https://github.com/apache/drill/pull/826#discussion_r117113119
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/ExecConstants.java ---
@@ -160,6 +160,9 @@
OptionValidator OUTPUT_FORMAT_VALIDATOR = new
StringValidator(OUTPUT_FORMAT_OPTION, "parquet");
String PARQUET_BLOCK_SIZE = "store.parquet.block-size";
OptionValidator PARQUET_BLOCK_SIZE_VALIDATOR = new
LongValidator(PARQUET_BLOCK_SIZE, 512*1024*1024);
+ String PARQUET_WRITER_USE_CONFIGURED_BLOCK_SIZE =
"store.parquet.writer.use_configured_block-size";
--- End diff --
ok, I went with "store.parquet.writer.use_single_fs_block". Please review
updated changes.
> 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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