# Package org.apache.lucene.codecs.memory

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

See: Description

Class Summary
DirectDocValuesFormat: In-memory docvalues format that does no (or very little) compression.
DirectPostingsFormat: Wraps `Lucene84PostingsFormat` 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.

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

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