satishkotha opened a new pull request #2502:
URL: https://github.com/apache/hudi/pull/2502
## What is the purpose of the pull request
Fix 2 issues found during large scale testing of clustering
## Brief change log
* writeStatusRDD.isEmpty() call is taking 15-25% empty and limiting
parallelism for clustering.
* bug using 'int' during plan generation instead of long is limiting
clustering max group size.
## Verify this pull request
This pull request is already covered by existing tests, such as.
1)TestHoodieClientOnCopyOnWriteStorage#testClusteringWithSortColumns,
testSimpleClustering
2) TestHoodieMergeOnReadTable#testSimpleClusteringWithUpdates,
testSimpleClusteringNoUpdates
I repeated this test on large scale dataset and verified this improves
runtime of clustering operation by 20%
We can add more specific tests for measuring performance and validating
clustering plan. I plan to take it up as separate item. This probably requires
updating 0.7 release because performance improvement is substantial
## Committer checklist
- [ ] Has a corresponding JIRA in PR title & commit
- [ ] Commit message is descriptive of the change
- [ ] CI is green
- [ ] Necessary doc changes done or have another open PR
- [ ] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
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