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Fig. 3.5 State diagram of a workflow execution
action can be called in both states, resulting in
delete
state, while a
resume
action can be invoked in
state only. Resuming a workflow effects its sub-
mission as a new workflow instance again, excluding the jobs executed correctly
earlier, so through a temporary resuming state the workflow will be in running
state again. Nevertheless, users have the option to stop the execution any time when
the workflow is in
error
running
state by clicking the
suspend
button. This action
changes the state to
, in which the workflow can be deleted or resumed.
As is illustrated in Fig. 3.5 the workflow enactment and all of the possible
actions can be taken via the web-based user interface.
Additionally, users are allowed to suspend those jobs that are currently being
interpreted; hence the workflow instance can be recon
suspended
gured, and then the instance
can be resumed with its modi
ed con
guration. To let the users change the con-
files generated by job
instances can be downloaded and standard output and standard error outputs can be
visualized immediately after their execution.
figuration considering the former jobs
'
output, all
the
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