[GitHub] [incubator-druid] jihoonson opened a new pull request #8257: Add support for parallel native indexing with shuffle for perfect rollup

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jihoonson opened a new pull request #8257: Add support for parallel native indexing with shuffle for perfect rollup
URL: https://github.com/apache/incubator-druid/pull/8257
 
 
   Part of https://github.com/apache/incubator-druid/issues/8061.
   
   This PR is based on https://github.com/apache/incubator-druid/pull/8236.
   
   ### Description
   
   This PR adds support for parallel native indexing with shuffle for perfect rollup.
   
   #### New configurations in `tuningConfig` for parallel index task:
   
   - `forceGuaranteedRollup`: parallel indexing is executed in two phases with shuffle if this is set.
   - `maxNumSegmentsToMerge`: Max limit for the number of segments that a single task can merge at the same time in the second phase. Used only `forceGuaranteedRollup` is set.
   - `totalNumMergeTasks`: Total number of tasks to merge segments in the second phase when `forceGuaranteedRollup` is set.
   
   #### Refactoring
   
   - `FiniteFirehoseProcessor` is added to share the duplicate codes to process a firehose
   - `ParallelIndexPhaseRunner` is added to share the duplicate codes in the implementations of ParallelIndexTaskRunner
   - Added `SubTaskReport` interface to support different types of subtask reports
   
   #### Multi-phase indexing
   
   If `forceGuaranteedRollup` is set, `ParallelIndexSupervisorTask` runs `PartialSegmentGenerateParallelIndexTaskRunner` and `PartialSegmentMergeParallelIndexTaskRunner` for the first and second phases, respectively. 
   
   <hr>
   
   This PR has:
   - [x] been self-reviewed.
      - [x] using the [concurrency checklist](https://github.com/apache/incubator-druid/blob/master/dev/code-review/concurrency.md) (Remove this item if the PR doesn't have any relation to concurrency.)
   - [x] added documentation for new or modified features or behaviors.
   - [x] added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
   - [x] added unit tests or modified existing tests to cover new code paths.
   - [x] been tested in a test Druid cluster.
     - tested by ingesting the lineitem data of TPC-H@100GB

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