zhtaoxiang commented on code in PR #9890:
URL: https://github.com/apache/pinot/pull/9890#discussion_r1040144315
##########
pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/mergerollup/MergeRollupTaskGenerator.java:
##########
@@ -61,13 +63,26 @@
/**
* A {@link PinotTaskGenerator} implementation for generating tasks of type
{@link MergeRollupTask}
*
- * TODO: Add the support for realtime table
+ * Assumptions:
+ * - When the MergeRollupTask starts the first time, records older than the
bufferTimeMs have already been ingested.
Review Comment:
1. I agree that the code I pointed out is only used by metrics
2. the code snippet you posted here is used to prevent bucketEndMs from
moving too far
The real progress is managed by the `watermark`, it will not move too far:
https://github.com/apache/pinot/blob/master/pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/mergerollup/MergeRollupTaskGenerator.java#L342.
This value will not excceed the max end time ms of all ready to process
segments.
What do you think?
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