Class 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 .NET 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 (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 SortedSetDocValuesField) added, then no more than ~210 M documents can be added to one segment.

Inheritance
System.Object
DocValuesFormat
DirectDocValuesFormat
Inherited Members
Namespace: Lucene.Net.Codecs.Memory
Assembly: Lucene.Net.Codecs.dll
Syntax
public class DirectDocValuesFormat : DocValuesFormat

Constructors

| Improve this Doc View Source

DirectDocValuesFormat()

Sole constructor.

Declaration
public DirectDocValuesFormat()

Fields

| Improve this Doc View Source

MAX_SORTED_SET_ORDS

The sum of the number of values across all documents in a sorted set field cannot exceed this.

Declaration
public static readonly int MAX_SORTED_SET_ORDS
Field Value
Type Description
System.Int32
| Improve this Doc View Source

MAX_TOTAL_BYTES_LENGTH

The sum of all byte lengths for binary field, or for the unique values in sorted or sorted set fields, cannot exceed this.

Declaration
public static readonly int MAX_TOTAL_BYTES_LENGTH
Field Value
Type Description
System.Int32

Methods

| Improve this Doc View Source

FieldsConsumer(SegmentWriteState)

Declaration
public override DocValuesConsumer FieldsConsumer(SegmentWriteState state)
Parameters
Type Name Description
SegmentWriteState state
Returns
Type Description
DocValuesConsumer
Overrides
| Improve this Doc View Source

FieldsProducer(SegmentReadState)

Declaration
public override DocValuesProducer FieldsProducer(SegmentReadState state)
Parameters
Type Name Description
SegmentReadState state
Returns
Type Description
DocValuesProducer
Overrides