HADOOP-18788: Support lz4 highCompressor level. #5799
Closed
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Description of PR
The Hadoop's LZ4 compression codec now depends on lz4-java. There two type of compressor in lz4,
fastCompressorandhighCompressor. The default lz4 compressor in hadoop is fastCompressor, we also can use highCompressor by using configIO_COMPRESSION_CODEC_LZ4_USELZ4HC_DEFAULTWhen we want to use highCompressor in hadoop, we only can use the default compression level, which is level 9. while highCompressor in lz4-java supports compression level from 1 to 17.
This PR add a configuration to let users to choose different compresssionLevel for lz4 highCompressor.
How was this patch tested?
UT
For code changes:
LICENSE,LICENSE-binary,NOTICE-binaryfiles?