# Package org.apache.lucene.codecs.memory

package org.apache.lucene.codecs.memory
Term dictionary, DocValues or Postings formats that are read entirely into memory.

- Classes
  Class
  Description
  DirectPostingsFormat
  Wraps `Lucene103PostingsFormat` format for on-disk storage, but then at read time loads and stores all terms and postings directly in RAM as byte[], int[].
  FSTPostingsFormat
  FST term dict + Lucene50PBF
  FSTTermsReader
  FST-based terms dictionary reader.
  FSTTermsWriter
  FST-based term dict, using metadata as FST output.