User Guide Task & Job States
Tasks are nodes in the abstract workflow graph representing processes that should run once their prerequisites are satisfied. Jobs are the real processes submitted to execute these tasks (or at least, at the submission stage, real job scripts). A task can have multiple jobs, by automatic retries and manual re-triggering.
Cylc 7 had 13 task/job states. The GUI only showed tasks, with job data from the latest job.
Cylc 8 has only 8 task/job states. The Cylc 8 UI shows both task and jobs. Task icons are monochrome circles; job icons are coloured squares. The running task icon incorporates a radial progress indicator.