[GitHub] [incubator-druid] jihoonson opened a new pull request #8161: Add benchmark for VersionedIntervalTimeline

[GitBox <gi...@apache.org>]

jihoonson opened a new pull request #8161: Add benchmark for VersionedIntervalTimeline
URL: https://github.com/apache/incubator-druid/pull/8161
 
 
   Benchmark for VersionedIntervalTimeline introduced in https://github.com/apache/incubator-druid/pull/7547#issuecomment-511966275.
   
   ## Description
   
   The primary purpose of this benchmark is to measure how much slower VersionedIntervalTimeline is with segment lock than with timeChunk lock.
   
   ### Data setup
   
   A synthetic segments were created to emulate the usual compaction scenario where initial segments are created and then they got compacted while new segments are appended. The benchmark first generates `numInitialRootGenSegmentsPerInterval` segments per interval. Then, it generates `numInitialRootGenSegmentsPerInterval * COMPACTED_SEGMENTS_RATIO_TO_INITIAL_SEGMENTS` compacted segments which overwrites the segments of the previous generation. It also generates new appending segments. This can be repeated more than once based on `numNonRootGenerations`.
   
   <hr>
   
   This PR has:
   - [x] been self-reviewed.

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