Package org.apache.lucene.index
Class LogDocMergePolicy
java.lang.Object
org.apache.lucene.index.MergePolicy
org.apache.lucene.index.LogMergePolicy
org.apache.lucene.index.LogDocMergePolicy
This is a
LogMergePolicy that measures size of a segment as the number of documents (not
taking deletions into account).-
Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.index.MergePolicy
MergePolicy.MergeAbortedException, MergePolicy.MergeContext, MergePolicy.MergeException, MergePolicy.MergeSpecification, MergePolicy.OneMerge, MergePolicy.OneMergeProgress -
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final intDefault minimum segment size.Fields inherited from class org.apache.lucene.index.LogMergePolicy
calibrateSizeByDeletes, DEFAULT_MAX_MERGE_DOCS, DEFAULT_MERGE_FACTOR, DEFAULT_NO_CFS_RATIO, LEVEL_LOG_SPAN, maxMergeDocs, maxMergeSize, maxMergeSizeForForcedMerge, mergeFactor, minMergeSize, targetSearchConcurrencyFields inherited from class org.apache.lucene.index.MergePolicy
DEFAULT_MAX_CFS_SEGMENT_SIZE, maxCFSSegmentSize, noCFSRatio -
Constructor Summary
ConstructorsConstructorDescriptionSole constructor, setting all settings to their defaults. -
Method Summary
Modifier and TypeMethodDescriptionintGet the minimum size for a segment to remain un-merged.voidsetMinMergeDocs(int minMergeDocs) Sets the minimum size for the lowest level segments.protected longsize(SegmentCommitInfo info, MergePolicy.MergeContext mergeContext) Return the byte size of the providedSegmentCommitInfo, prorated by percentage of non-deleted documents is set.Methods inherited from class org.apache.lucene.index.LogMergePolicy
findForcedDeletesMerges, findForcedMerges, findMerges, getCalibrateSizeByDeletes, getMaxMergeDocs, getMergeFactor, getTargetSearchConcurrency, isMerged, maxFullFlushMergeSize, setCalibrateSizeByDeletes, setMaxMergeDocs, setMergeFactor, setTargetSearchConcurrency, sizeBytes, sizeDocs, toStringMethods inherited from class org.apache.lucene.index.MergePolicy
assertDelCount, findFullFlushMerges, findMerges, getMaxCFSSegmentSizeMB, getNoCFSRatio, isMerged, keepFullyDeletedSegment, message, numDeletesToMerge, segString, setMaxCFSSegmentSizeMB, setNoCFSRatio, useCompoundFile, verbose
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Field Details
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DEFAULT_MIN_MERGE_DOCS
public static final int DEFAULT_MIN_MERGE_DOCSDefault minimum segment size. @see setMinMergeDocs- See Also:
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Constructor Details
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LogDocMergePolicy
public LogDocMergePolicy()Sole constructor, setting all settings to their defaults.
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Method Details
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size
protected long size(SegmentCommitInfo info, MergePolicy.MergeContext mergeContext) throws IOException Description copied from class:MergePolicyReturn the byte size of the providedSegmentCommitInfo, prorated by percentage of non-deleted documents is set.- Overrides:
sizein classMergePolicy- Throws:
IOException
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setMinMergeDocs
public void setMinMergeDocs(int minMergeDocs) Sets the minimum size for the lowest level segments. Any segments below this size are candidates for full-flush merges and merged more aggressively in order to avoid having a long tail of small segments. Large values of this parameter increase the merging cost during indexing if you flush small segments. -
getMinMergeDocs
public int getMinMergeDocs()Get the minimum size for a segment to remain un-merged.- See Also:
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