GitHub user xuchuanyin reopened a pull request:
https://github.com/apache/carbondata/pull/2628
[CARBONDATA-2851] Support zstd as column compressor in final store
1. add zstd compressor for compressing column data
2. add zstd support in thrift
3. legacy store is not considered in this commit
4. since zstd does not support zero-copy while compressing, offheap will
not take effect for zstd
A simple test with 1.2GB raw CSV data shows that the size (in MB) of final
store with different compressor:
| local dictionary | snappy | zstd | Size Reduced |
| --- | --- | --- | -- |
| local dict enabled | 335 | 207 | 38.2% |
| local dict disabled | 375 | 225 | 40% |
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.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/xuchuanyin/carbondata
0810_support_zstd_compressor_final_store
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/2628.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 #2628
----
commit bcd3d8f9c64f197668d46d29af1aa2ee2d956ceb
Author: xuchuanyin <xuchuanyin@...>
Date: 2018-08-10T14:02:57Z
Support zstd as column compressor in final store
1. add zstd compressor for compressing column data
2. add zstd support in thrift
3. legacy store is not considered in this commit
4. since zstd does not support zero-copy while compressing, offheap will
not take effect for zstd
----
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