| Class | Description |
|---|---|
| Ack |
The Ack class
|
| Barrier |
The Barrier class
|
| Join |
This class records the destinations of each
partition.
|
| PartitionCount |
PartitionCount records the number of partitions
on the worker
|
| PartitionSet |
PartitionSet is the set of partition IDs on the
worker
|