Task

A task contain partial job information such as data split, etc. in order to accomplish a job.

Phase

A single task phase.

• STARTING: Initial phase
• COMPUTE: Within bsp()
• BARRIER_SYNC: Reaching sync().
• CLEANUP: Finish entire supersteps execution.

State

This only indicate a task state.

• UNASSIGNED: Initial state of a task.
• RUNNING: Only valid when a task is either in COMPUTE or in BARRIER_SYNC phase.
• SUCCEEDED: A task completes its execution at the end of CLEANUP phase.
• FAILED: An exception or an error occurrs.
• KILLED