# Package org.apache.lucene.codecs.memory

Term dictionary, DocValues or Postings formats that are read entirely into memory.

See: Description

- Class Summary
  Class | Description
  --- | ---
  DirectDocValuesFormat | In-memory docvalues format that does no (or very little) compression.
  DirectPostingsFormat | Wraps `Lucene50PostingsFormat` format for on-disk storage, but then at read time loads and stores all terms and postings directly in RAM as byte[], int[].
  FSTOrdPostingsFormat | FSTOrd term dict + Lucene50PBF
  FSTOrdTermsReader | FST-based terms dictionary reader.
  FSTOrdTermsWriter | FST-based term dict, using ord as FST output.
  FSTPostingsFormat | FST term dict + Lucene50PBF
  FSTTermsReader | FST-based terms dictionary reader.
  FSTTermsWriter | FST-based term dict, using metadata as FST output.
  MemoryDocValuesFormat | In-memory docvalues format
  MemoryPostingsFormat | Stores terms and postings (docs, positions, payloads) in RAM, using an FST.

## Package org.apache.lucene.codecs.memory Description

Term dictionary, DocValues or Postings formats that are read entirely into memory.

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