Maxim Gekk created SPARK-24881:
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Summary: New options - compression and compressionLevel
Key: SPARK-24881
URL: https://issues.apache.org/jira/browse/SPARK-24881
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 2.3.1
Reporter: Maxim Gekk
Currently Avro datasource takes the compression codec name from SQL config
(config key is hard coded in AvroFileFormat):
https://github.com/apache/spark/blob/106880edcd67bc20e8610a16f8ce6aa250268eeb/external/avro/src/main/scala/org/apache/spark/sql/avro/AvroFileFormat.scala#L121-L125
. The obvious cons of it is modification of the global config can impact of
multiple writes.
A purpose of the ticket is to add new Avro option - "compression" the same as
we already have for other datasource like JSON, CSV and etc. If new option is
not set by an user, we take settings from SQL config
spark.sql.avro.compression.codec. If the former one is not set too, default
compression codec will be snappy (this is current behavior in the master).
Besides of the compression option, need to add another option -
compressionLevel which should reflect another SQL config in Avro:
https://github.com/apache/spark/blob/106880edcd67bc20e8610a16f8ce6aa250268eeb/external/avro/src/main/scala/org/apache/spark/sql/avro/AvroFileFormat.scala#L122
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