Class Lucene90CompressingTermVectorsFormat
- Direct Known Subclasses:
Lucene90TermVectorsFormat
TermVectorsFormat
that compresses chunks of documents together in order to improve the
compression ratio.- WARNING: This API is experimental and might change in incompatible ways in the next release.
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Constructor Summary
ConstructorDescriptionLucene90CompressingTermVectorsFormat
(String formatName, String segmentSuffix, CompressionMode compressionMode, int chunkSize, int maxDocsPerChunk, int blockSize) Create a newLucene90CompressingTermVectorsFormat
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Method Summary
Modifier and TypeMethodDescriptiontoString()
final TermVectorsReader
vectorsReader
(Directory directory, SegmentInfo segmentInfo, FieldInfos fieldInfos, IOContext context) Returns aTermVectorsReader
to read term vectors.final TermVectorsWriter
vectorsWriter
(Directory directory, SegmentInfo segmentInfo, IOContext context) Returns aTermVectorsWriter
to write term vectors.
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Constructor Details
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Lucene90CompressingTermVectorsFormat
public Lucene90CompressingTermVectorsFormat(String formatName, String segmentSuffix, CompressionMode compressionMode, int chunkSize, int maxDocsPerChunk, int blockSize) Create a newLucene90CompressingTermVectorsFormat
.formatName
is the name of the format. This name will be used in the file formats to performcodec header checks
.The
compressionMode
parameter allows you to choose between compression algorithms that have various compression and decompression speeds so that you can pick the one that best fits your indexing and searching throughput. You should never instantiate twoLucene90CompressingTermVectorsFormat
s that have the same name but differentCompressionMode
s.chunkSize
is the minimum byte size of a chunk of documents. Higher values ofchunkSize
should improve the compression ratio but will require more memory at indexing time and might make document loading a little slower (depending on the size of your OS cache compared to the size of your index).- Parameters:
formatName
- the name of theStoredFieldsFormat
segmentSuffix
- a suffix to append to files created by this formatcompressionMode
- theCompressionMode
to usechunkSize
- the minimum number of bytes of a single chunk of stored documentsmaxDocsPerChunk
- the maximum number of documents in a single chunkblockSize
- the number of chunks to store in an index block.- See Also:
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Method Details
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vectorsReader
public final TermVectorsReader vectorsReader(Directory directory, SegmentInfo segmentInfo, FieldInfos fieldInfos, IOContext context) throws IOException Description copied from class:TermVectorsFormat
Returns aTermVectorsReader
to read term vectors.- Specified by:
vectorsReader
in classTermVectorsFormat
- Throws:
IOException
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vectorsWriter
public final TermVectorsWriter vectorsWriter(Directory directory, SegmentInfo segmentInfo, IOContext context) throws IOException Description copied from class:TermVectorsFormat
Returns aTermVectorsWriter
to write term vectors.- Specified by:
vectorsWriter
in classTermVectorsFormat
- Throws:
IOException
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toString
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