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| author | Davies Liu <davies@databricks.com> | 2015-12-21 14:21:43 -0800 |
|---|---|---|
| committer | Davies Liu <davies.liu@gmail.com> | 2015-12-21 14:21:43 -0800 |
| commit | 29cecd4a42f6969613e5b2a40f2724f99e7eec01 (patch) | |
| tree | 261b40272c991649ce584b7cec2056dcd2b6cf1c /docs/configuration.md | |
| parent | d655d37ddf59d7fb6db529324ac8044d53b2622a (diff) | |
| download | spark-29cecd4a42f6969613e5b2a40f2724f99e7eec01.tar.gz spark-29cecd4a42f6969613e5b2a40f2724f99e7eec01.tar.bz2 spark-29cecd4a42f6969613e5b2a40f2724f99e7eec01.zip | |
[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
Author: Davies Liu <davies@databricks.com>
Closes #10342 from davies/lz4.
Diffstat (limited to 'docs/configuration.md')
| -rw-r--r-- | docs/configuration.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/configuration.md b/docs/configuration.md index 85e7d1202d..a9ef37a9b1 100644 --- a/docs/configuration.md +++ b/docs/configuration.md @@ -595,7 +595,7 @@ Apart from these, the following properties are also available, and may be useful </tr> <tr> <td><code>spark.io.compression.codec</code></td> - <td>snappy</td> + <td>lz4</td> <td> The codec used to compress internal data such as RDD partitions, broadcast variables and shuffle outputs. By default, Spark provides three codecs: <code>lz4</code>, <code>lzf</code>, |