GitHub user kevinjmh reopened a pull request:
https://github.com/apache/carbondata/pull/2350
[CARBONDATA-2553] support ZSTD compression for sort temp file
Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:
- [ ] Any interfaces changed?
- [ ] Any backward compatibility impacted?
- [ ] Document update required?
- [ ] Testing done
Please provide details on
- Whether new unit test cases have been added or why no new tests
are required?
- How it is tested? Please attach test report.
- Is it a performance related change? Please attach the performance
test report.
- Any additional information to help reviewers in testing this
change.
- [ ] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
ZSTD project Homeï¼ http://facebook.github.io/zstd/
Zstandard is a real-time compression algorithm, providing high compression
ratios. It can offer higher compression ratio than snappy with similar speed.
In our test, we find that the file size of sort temp file generated by zstd
almost half of snappy.
Hadoop and Spark also imported this project. See:
https://github.com/apache/hadoop/commit/a0a276162147e843a5a4e028abdca5b66f5118da
https://github.com/apache/spark/commit/444bce1c98c45147fe63e2132e9743a0c5e49598
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kevinjmh/carbondata zstd
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/2350.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 #2350
----
commit 0777ffd96a486706ced46cd1270e576644a840fa
Author: Manhua <kevinjmh@...>
Date: 2018-05-29T01:21:52Z
support ZSTD compression for sort temp file
commit 61d5f0ca2a0411b325624e9ae7c9e8f04461d104
Author: Manhua <kevinjmh@...>
Date: 2018-05-29T01:36:15Z
update comment and doc
----
---
