Examples of org.apache.lucene.codecs.memory.DirectDocValuesFormat

org.apache.lucene.codecs.memory.DirectDocValuesFormat

In-memory docvalues format that does no (or very little) compression. Indexed values are stored on disk, but then at search time all values are loaded into memory as simple java arrays. For numeric values, it uses byte[], short[], int[], long[] as necessary to fit the range of the values. For binary values, there is an int (4 bytes) overhead per value.

Limitations:

For binary and sorted fields the total space required for all binary values cannot exceed about 2.1 GB (see #MAX_TOTAL_BYTES_LENGTH).
For sorted set fields, the sum of the size of each document's set of values cannot exceed about 2.1 B values (see #MAX_SORTED_SET_ORDS). For example, if every document has 10 values (10 instances of {@link SortedSetDocValuesField}) added, then no more than ~210 M documents can be added to one segment.

  public static void beforeClass() throws Exception {
    savedCodec = Codec.getDefault();
    // currently only these codecs that support random access ordinals
    int victim = random().nextInt(2);
    switch(victim) {
      case 0:  Codec.setDefault(TestUtil.alwaysDocValuesFormat(new DirectDocValuesFormat()));
      default: Codec.setDefault(TestUtil.alwaysDocValuesFormat(new Lucene49DocValuesFormat()));
    }
  }

  public static void beforeClass() throws Exception {
    savedCodec = Codec.getDefault();
    // currently only these codecs that support random access ordinals
    int victim = random().nextInt(3);
    switch(victim) {
      case 0:  Codec.setDefault(TestUtil.alwaysDocValuesFormat(new DirectDocValuesFormat()));
      case 1:  Codec.setDefault(TestUtil.alwaysDocValuesFormat(new DiskDocValuesFormat()));
      default: Codec.setDefault(TestUtil.alwaysDocValuesFormat(new Lucene45DocValuesFormat()));
    }
  }

Examples of org.apache.lucene.codecs.memory.DirectDocValuesFormat

Related Classes of org.apache.lucene.codecs.memory.DirectDocValuesFormat