GitHub user kevinjmh opened a pull request:
https://github.com/apache/carbondata/pull/2624
[CARBONDATA-2845][BloomDataMap] Merge bloom index files of multi-shards for
each index column
Currently a bloom index file will be generated per task per load, the query
performance will be bad if we have many segments. Main datamap already faced
this problem before.
Here we want to merge the bloom index file in segment scope just like the
main datamap do.
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/kevinjmh/carbondata merge_bloomindex
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/2624.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 #2624
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commit 271143cb342b9528e5daccfc0c5af5a2397b0ece
Author: Manhua <kevinjmh@...>
Date: 2018-08-09T11:17:02Z
merge bloom index
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