io.druid.segment

Class IndexSpec

java.lang.Object

io.druid.segment.IndexSpec

public class IndexSpec
extends Object

IndexSpec defines segment storage format options to be used at indexing time, such as bitmap type, and column compression formats. IndexSpec is specified as part of the TuningConfig for the corresponding index task.

Field Summary

Fields

Modifier and Type	Field and Description
static CompressedObjectStrategy.CompressionStrategy	DEFAULT_DIMENSION_COMPRESSION
static CompressionFactory.LongEncodingStrategy	DEFAULT_LONG_ENCODING
static CompressedObjectStrategy.CompressionStrategy	DEFAULT_METRIC_COMPRESSION

Constructor Summary

Constructors

Constructor and Description
IndexSpec() Creates an IndexSpec with default parameters
IndexSpec(BitmapSerdeFactory bitmapSerdeFactory, CompressedObjectStrategy.CompressionStrategy dimensionCompression, CompressedObjectStrategy.CompressionStrategy metricCompression, CompressionFactory.LongEncodingStrategy longEncoding) Creates an IndexSpec with the given storage format settings.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
BitmapSerdeFactory	getBitmapSerdeFactory()
CompressedObjectStrategy.CompressionStrategy	getDimensionCompression()
CompressionFactory.LongEncodingStrategy	getLongEncoding()
CompressedObjectStrategy.CompressionStrategy	getMetricCompression()
int	hashCode()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_METRIC_COMPRESSION

public static final CompressedObjectStrategy.CompressionStrategy DEFAULT_METRIC_COMPRESSION

DEFAULT_DIMENSION_COMPRESSION

public static final CompressedObjectStrategy.CompressionStrategy DEFAULT_DIMENSION_COMPRESSION

DEFAULT_LONG_ENCODING

public static final CompressionFactory.LongEncodingStrategy DEFAULT_LONG_ENCODING

Constructor Detail

IndexSpec

public IndexSpec()

Creates an IndexSpec with default parameters

IndexSpec

public IndexSpec(BitmapSerdeFactory bitmapSerdeFactory,
                 CompressedObjectStrategy.CompressionStrategy dimensionCompression,
                 CompressedObjectStrategy.CompressionStrategy metricCompression,
                 CompressionFactory.LongEncodingStrategy longEncoding)

Creates an IndexSpec with the given storage format settings.

Parameters:

bitmapSerdeFactory - type of bitmap to use (e.g. roaring or concise), null to use the default. Defaults to the bitmap type specified by the (deprecated) "druid.processing.bitmap.type" setting, or, if none was set, uses the default defined in BitmapSerde

dimensionCompression - compression format for dimension columns, null to use the default. Defaults to CompressedObjectStrategy.DEFAULT_COMPRESSION_STRATEGY

metricCompression - compression format for metric columns, null to use the default. Defaults to CompressedObjectStrategy.DEFAULT_COMPRESSION_STRATEGY

longEncoding - encoding strategy for metric and dimension columns with type long, null to use the default. Defaults to CompressionFactory.DEFAULT_LONG_ENCODING_STRATEGY

Method Detail

getBitmapSerdeFactory

public BitmapSerdeFactory getBitmapSerdeFactory()

getDimensionCompression

public CompressedObjectStrategy.CompressionStrategy getDimensionCompression()

getMetricCompression

public CompressedObjectStrategy.CompressionStrategy getMetricCompression()

getLongEncoding

public CompressionFactory.LongEncodingStrategy getLongEncoding()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object