Adaptive Control of Redundant Task Execution for Dependable Volunteer Computing - Cloud, Grid and High Performance Computing: Emerging Applications - page 142

Figure 2. Worker i goes online

assumes the same task failure probability for all
the dispatched tasks. Thus, an enhanced workflow
management mechanism is proposed to assist
the LFPD.
To support the LFPD, the following informa-
tion of each task i is stored and updated by the
dispatcher.

• Status: ``undispatched'', ``dispatched'',

and ``finished.

• Redundancy rate that records how many

workers process the task i at the same time:
RR i .

• The list of worker IDs that process the task

i : workerID i [ RR i ].

• The list of estimated failure probability for

each copy of task i : EFPs i [ RR i ].