GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/330
[SPARK-1402] Added 3 more compression schemes
JIRA issue: [SPARK-1402](https://issues.apache.org/jira/browse/SPARK-1402)
This PR provides 3 more compression schemes for Spark SQL in-memory
columnar storage:
* `BooleanBitSet`
* `IntDelta`
* `LongDelta`
Now there are 6 compression schemes in total, including the no-op
`PassThrough` scheme.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark moreCompressionSchemes
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/330.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 #330
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commit 44fe4b25c44fa6dcadcf3a58de9be3e9bac58500
Author: Cheng Lian <[email protected]>
Date: 2014-04-03T05:56:41Z
Refactored CompressionScheme, added 3 more compression schemes.
New schemes: BooleanBitSet, IntDelta and LongDelta
commit 3c1ad7afc74179536ef2898627e0192a7b6c68cc
Author: Cheng Lian <[email protected]>
Date: 2014-04-03T18:36:45Z
Added test suite for BooleanBitSet, refactored other test suites
commit d7c0e8fe18eb5b759200dca86ec8c6fe98462d23
Author: Cheng Lian <[email protected]>
Date: 2014-04-05T02:36:26Z
Added test suite for IntegralDelta (IntDelta & LongDelta)
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