org.apache.lucene.index
Class SegmentWriteState

java.lang.Object
  org.apache.lucene.index.SegmentWriteState

public class SegmentWriteState
extends Object

Holder class for common parameters used during write.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

BitVector	deletedDocs
Directory	directory
FieldInfos	fieldInfos
boolean	hasVectors
PrintStream	infoStream
int	maxSkipLevels Expert: The maximum number of skip levels.
int	numDocs
org.apache.lucene.index.BufferedDeletes	segDeletes
String	segmentName
int	skipInterval Expert: The fraction of TermDocs entries stored in skip tables, used to accelerate TermDocs.skipTo(int).
int	termIndexInterval Expert: The fraction of terms in the "dictionary" which should be stored in RAM.

Constructor Summary

SegmentWriteState(PrintStream infoStream, Directory directory, String segmentName, FieldInfos fieldInfos, int numDocs, int termIndexInterval, org.apache.lucene.index.BufferedDeletes segDeletes)

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

infoStream

public final PrintStream infoStream

directory

public final Directory directory

segmentName

public final String segmentName

fieldInfos

public final FieldInfos fieldInfos

numDocs

public final int numDocs

hasVectors

public boolean hasVectors

segDeletes

public final org.apache.lucene.index.BufferedDeletes segDeletes

deletedDocs

public BitVector deletedDocs

termIndexInterval

public final int termIndexInterval

Expert: The fraction of terms in the "dictionary" which should be stored in RAM. Smaller values use more memory, but make searching slightly faster, while larger values use less memory and make searching slightly slower. Searching is typically not dominated by dictionary lookup, so tweaking this is rarely useful.

skipInterval

public final int skipInterval

Expert: The fraction of TermDocs entries stored in skip tables, used to accelerate TermDocs.skipTo(int). Larger values result in smaller indexes, greater acceleration, but fewer accelerable cases, while smaller values result in bigger indexes, less acceleration and more accelerable cases. More detailed experiments would be useful here.

See Also:

Constant Field Values

maxSkipLevels

public final int maxSkipLevels

Expert: The maximum number of skip levels. Smaller values result in slightly smaller indexes, but slower skipping in big posting lists.

See Also:

Constant Field Values

Constructor Detail

SegmentWriteState

public SegmentWriteState(PrintStream infoStream,
                         Directory directory,
                         String segmentName,
                         FieldInfos fieldInfos,
                         int numDocs,
                         int termIndexInterval,
                         org.apache.lucene.index.BufferedDeletes segDeletes)