Class DirectPostingsFormat

Wraps Lucene41PostingsFormat format for on-disk storage, but then at read time loads and stores all terms & postings directly in RAM as byte[], int[].

WARNING: This is exceptionally RAM intensive: it makes no effort to compress the postings data, storing terms as separate byte[] and postings as separate int[], but as a result it gives substantial increase in search performance.

This postings format supports Ord and SeekExact(Int64).

Because this holds all term bytes as a single byte[], you cannot have more than 2.1GB worth of term bytes in a single segment.

@lucene.experimental

Inheritance
System.Object
PostingsFormat
DirectPostingsFormat
Inherited Members
Assembly: Lucene.Net.Codecs.dll
Syntax
public sealed class DirectPostingsFormat : PostingsFormat

Constructors

Name Description
DirectPostingsFormat()
DirectPostingsFormat(Int32, Int32)

minSkipCount is how many terms in a row must have the same prefix before we put a skip pointer down. Terms with docFreq less than or equal lowFreqCutoff will use a single int[] to hold all docs, freqs, position and offsets; terms with higher docFreq will use separate arrays.

Methods

Name Description
FieldsConsumer(SegmentWriteState)
FieldsProducer(SegmentReadState)

Extension Methods