public static class InflightDataRescalingDescriptor.InflightDataGateOrPartitionRescalingDescriptor extends Object implements Serializable
For inputs, this mapping implies the following:
oldSubtaskIndexes is set when there is a rescale on this task potentially
leading to different key groups. Upstream task has a corresponding rescaledChannelsMappings where it sends data over virtual channel while specifying
the channel index in the VirtualChannelSelector. This subtask then demultiplexes over
the virtual subtask index.
rescaledChannelsMappings is set when there is a downscale of the upstream task.
Upstream task has a corresponding oldSubtaskIndexes where it sends data over
virtual channel while specifying the subtask index in the VirtualChannelSelector. This
subtask then demultiplexes over channel indexes.
For outputs, it's vice-versa. The information must be kept in sync but they are used in opposite ways for multiplexing/demultiplexing.
Note that in the common rescaling case both information is set and need to be simultaneously used. If the input subtask subsumes the state of 3 old subtasks and a channel corresponds to 2 old channels, then there are 6 virtual channels to be demultiplexed.
| Modifier and Type | Class and Description |
|---|---|
static class |
InflightDataRescalingDescriptor.InflightDataGateOrPartitionRescalingDescriptor.MappingType
Type of mapping which should be used for this in-flight data.
|
| Constructor and Description |
|---|
InflightDataGateOrPartitionRescalingDescriptor(int[] oldSubtaskIndexes,
RescaleMappings rescaledChannelsMappings,
Set<Integer> ambiguousSubtaskIndexes,
InflightDataRescalingDescriptor.InflightDataGateOrPartitionRescalingDescriptor.MappingType mappingType) |
public InflightDataGateOrPartitionRescalingDescriptor(int[] oldSubtaskIndexes,
RescaleMappings rescaledChannelsMappings,
Set<Integer> ambiguousSubtaskIndexes,
InflightDataRescalingDescriptor.InflightDataGateOrPartitionRescalingDescriptor.MappingType mappingType)
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