GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/10342
[SPARK-12388] change default compression to lz4
According the benchmark [1], LZ4-java could be 80% (or 30%) faster than
Snappy.
After changing the compressor to LZ4, I saw 20% improvement on end-to-end
time for a TPCDS query (Q4).
[1] https://github.com/ning/jvm-compressor-benchmark/wiki
cc @rxin
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark lz4
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10342.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #10342
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commit 14940de30480091618be8ca362c719c936685c4b
Author: Davies Liu <[email protected]>
Date: 2015-12-17T00:55:48Z
change default compression to lz4
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