# org.apache.hadoop.mapreduce.v2.app.speculate

## Interfaces

- Speculator
- TaskRuntimeEstimator

## Classes

- DataStatistics
- DefaultSpeculator
- ExponentiallySmoothedTaskRuntimeEstimator
- LegacyTaskRuntimeEstimator
- NullTaskRuntimesEngine
- SimpleExponentialTaskRuntimeEstimator
- SpeculatorEvent
- TaskSpeculationPredicate

## Enums

- ExponentiallySmoothedTaskRuntimeEstimator.SmoothedValue
- Speculator.EventType