Example usage for org.apache.lucene.index TieredMergePolicy DEFAULT_NO_CFS_RATIO

Introduction

In this page you can find the example usage for org.apache.lucene.index TieredMergePolicy DEFAULT_NO_CFS_RATIO.

Prototype

double DEFAULT_NO_CFS_RATIO

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Document

Default noCFSRatio.

Usage

From source file:org.elasticsearch.index.shard.MergePolicyConfig.java

License:Apache License

public MergePolicyConfig(ESLogger logger, Settings indexSettings) {
    this.logger = logger;
    this.noCFSRatio = parseNoCFSRatio(
            indexSettings.get(INDEX_COMPOUND_FORMAT, Double.toString(TieredMergePolicy.DEFAULT_NO_CFS_RATIO)));
    double forceMergeDeletesPctAllowed = indexSettings.getAsDouble("index.merge.policy.expunge_deletes_allowed",
            DEFAULT_EXPUNGE_DELETES_ALLOWED); // percentage
    ByteSizeValue floorSegment = indexSettings.getAsBytesSize("index.merge.policy.floor_segment",
            DEFAULT_FLOOR_SEGMENT);/*  w w w .j  av a2s  .c o m*/
    int maxMergeAtOnce = indexSettings.getAsInt("index.merge.policy.max_merge_at_once",
            DEFAULT_MAX_MERGE_AT_ONCE);
    int maxMergeAtOnceExplicit = indexSettings.getAsInt("index.merge.policy.max_merge_at_once_explicit",
            DEFAULT_MAX_MERGE_AT_ONCE_EXPLICIT);
    // TODO is this really a good default number for max_merge_segment, what happens for large indices, won't they end up with many segments?
    ByteSizeValue maxMergedSegment = indexSettings.getAsBytesSize("index.merge.policy.max_merged_segment",
            DEFAULT_MAX_MERGED_SEGMENT);
    double segmentsPerTier = indexSettings.getAsDouble("index.merge.policy.segments_per_tier",
            DEFAULT_SEGMENTS_PER_TIER);
    double reclaimDeletesWeight = indexSettings.getAsDouble("index.merge.policy.reclaim_deletes_weight",
            DEFAULT_RECLAIM_DELETES_WEIGHT);
    this.mergesEnabled = indexSettings.getAsBoolean(INDEX_MERGE_ENABLED, true);
    if (mergesEnabled == false) {
        logger.warn(
                "[{}] is set to false, this should only be used in tests and can cause serious problems in production environments",
                INDEX_MERGE_ENABLED);
    }
    maxMergeAtOnce = adjustMaxMergeAtOnceIfNeeded(maxMergeAtOnce, segmentsPerTier);
    mergePolicy.setNoCFSRatio(noCFSRatio);
    mergePolicy.setForceMergeDeletesPctAllowed(forceMergeDeletesPctAllowed);
    mergePolicy.setFloorSegmentMB(floorSegment.mbFrac());
    mergePolicy.setMaxMergeAtOnce(maxMergeAtOnce);
    mergePolicy.setMaxMergeAtOnceExplicit(maxMergeAtOnceExplicit);
    mergePolicy.setMaxMergedSegmentMB(maxMergedSegment.mbFrac());
    mergePolicy.setSegmentsPerTier(segmentsPerTier);
    mergePolicy.setReclaimDeletesWeight(reclaimDeletesWeight);
    logger.debug(
            "using [tiered] merge mergePolicy with expunge_deletes_allowed[{}], floor_segment[{}], max_merge_at_once[{}], max_merge_at_once_explicit[{}], max_merged_segment[{}], segments_per_tier[{}], reclaim_deletes_weight[{}]",
            forceMergeDeletesPctAllowed, floorSegment, maxMergeAtOnce, maxMergeAtOnceExplicit, maxMergedSegment,
            segmentsPerTier, reclaimDeletesWeight);
}

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