Examples with StringSketchMerger org.apache.druid.indexing.common.task.batch.parallel.distribution.StringSketchMerger used on opensource projects

Example 1 with StringSketchMerger

use of org.apache.druid.indexing.common.task.batch.parallel.distribution.StringSketchMerger in project druid by druid-io.

the class ParallelIndexSupervisorTask method determineRangePartition.

private PartitionBoundaries determineRangePartition(Collection<StringDistribution> distributions) {
    StringDistributionMerger distributionMerger = new StringSketchMerger();
    distributions.forEach(distributionMerger::merge);
    StringDistribution mergedDistribution = distributionMerger.getResult();
    DimensionRangePartitionsSpec partitionsSpec = (DimensionRangePartitionsSpec) ingestionSchema.getTuningConfig().getGivenOrDefaultPartitionsSpec();
    final PartitionBoundaries partitions;
    Integer targetRowsPerSegment = partitionsSpec.getTargetRowsPerSegment();
    if (targetRowsPerSegment == null) {
        partitions = mergedDistribution.getEvenPartitionsByMaxSize(partitionsSpec.getMaxRowsPerSegment());
    } else {
        partitions = mergedDistribution.getEvenPartitionsByTargetSize(targetRowsPerSegment);
    }
    return partitions;
}