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https://issues.apache.org/jira/browse/BEAM-55?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15531312#comment-15531312
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Daniel Halperin commented on BEAM-55:
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Note that there is a good reason this was not originally supported: Compressing
output files is generally terrible for downstream processing. Most consumers of
files perform very poorly when reading from them (Examples: Dataflow and Google
BigQuery are both unable to parallelize reads from compressed files).
At Google, we highly discourage compressed data but prefer, e.g.,
block-compressed formats like Avro that combine compression and the ability to
seek/split/parallelize reading. AvroIO DOES support compression.
> Allow users to compress FileBasedSink output files
> --------------------------------------------------
>
> Key: BEAM-55
> URL: https://issues.apache.org/jira/browse/BEAM-55
> Project: Beam
> Issue Type: New Feature
> Components: sdk-java-core
> Reporter: Daniel Halperin
> Priority: Minor
>
> FileBasedSink (also TextIO.Write, AvroIO.Write, etc). does not have an option
> for compressing its output.
> In general, we discourage compression because it limits or blocks scalably
> reading from a file in parallel. However, users may want it -- so we should
> support the option (with appropriate warnings).
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