org.apache.hudi.config

Enum HoodieClusteringConfig.SpatialCurveCompositionStrategyType

java.lang.Object

java.lang.Enum<HoodieClusteringConfig.SpatialCurveCompositionStrategyType>

org.apache.hudi.config.HoodieClusteringConfig.SpatialCurveCompositionStrategyType

All Implemented Interfaces:

Serializable, Comparable<HoodieClusteringConfig.SpatialCurveCompositionStrategyType>

Enclosing class:

HoodieClusteringConfig

@EnumDescription(value="This configuration only has effect if `hoodie.layout.optimize.strategy` is set to either \"z-order\" or \"hilbert\" (i.e. leveraging space-filling curves). This configuration controls the type of a strategy to use for building the space-filling curves, tackling specifically how the Strings are ordered based on the curve. Since we truncate the String to 8 bytes for ordering, there are two issues: (1) it can lead to poor aggregation effect, (2) the truncation of String longer than 8 bytes loses the precision, if the Strings are different but the 8-byte prefix is the same. The boundary-based interleaved index method (\"SAMPLE\") has better generalization, solving the two problems above, but is slower than direct method (\"DIRECT\"). User should benchmark the write and query performance before tweaking this in production, if this is actually a problem. Please refer to RFC-28 for more details.")
public static enum HoodieClusteringConfig.SpatialCurveCompositionStrategyType
extends Enum<HoodieClusteringConfig.SpatialCurveCompositionStrategyType>

Type of strategy for building Z-order/Hilbert space-filling curves.

Enum Constant Summary

Enum Constants

Enum Constant and Description
DIRECT
SAMPLE

Method Summary

Modifier and Type	Method and Description
static HoodieClusteringConfig.SpatialCurveCompositionStrategyType	valueOf(String name) Returns the enum constant of this type with the specified name.
static HoodieClusteringConfig.SpatialCurveCompositionStrategyType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

DIRECT

@EnumFieldDescription(value="This strategy builds the spatial curve in full, filling in all of the individual points corresponding to each individual record, which requires less compute.")
public static final HoodieClusteringConfig.SpatialCurveCompositionStrategyType DIRECT

SAMPLE

@EnumFieldDescription(value="This strategy leverages boundary-base interleaved index method (described in more details in Amazon DynamoDB blog https://aws.amazon.com/cn/blogs/database/tag/z-order/) and produces a better layout compared to DIRECT strategy.  It requires more compute and is slower.")
public static final HoodieClusteringConfig.SpatialCurveCompositionStrategyType SAMPLE

Method Detail

values

public static HoodieClusteringConfig.SpatialCurveCompositionStrategyType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (HoodieClusteringConfig.SpatialCurveCompositionStrategyType c : HoodieClusteringConfig.SpatialCurveCompositionStrategyType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static HoodieClusteringConfig.SpatialCurveCompositionStrategyType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null