def _get_deadline(self, type, lease, start):
if self.deadlinestretch_dist == None:
return None, None
else:
if type in (FileGenerator.DEADLINE_DURATION, FileGenerator.DEADLINE_SLOWDOWN):
if type == FileGenerator.DEADLINE_DURATION:
tau = self.deadlinestretch_dist.get()
elif type == FileGenerator.DEADLINE_SLOWDOWN:
runtime = float(lease.extras["SWF_runtime"])
waittime = float(lease.extras["SWF_waittime"])
if runtime < 10: runtime = 10
slowdown = (waittime + runtime) / runtime
min = self.deadlinestretch_dist.min
max = self.deadlinestretch_dist.max
tau = self.deadlinestretch_dist.get()
tau = (slowdown - 1)*((tau-min) / (max-min))
deadline = round_datetime_delta(start + (1 + tau)*lease.duration.requested)
elif type == FileGenerator.DEADLINE_ABSOLUTE:
wait = self.deadlinestretch_dist.get()
deadline = round_datetime_delta(start + TimeDelta(seconds=wait) + lease.duration.requested)
tau = ((deadline - start) / lease.duration.requested) - 1
return deadline, tau
def _get_start(self, type, lease = None):
if self.startdelay_dist == None:
return None, None
else:
delta = self.startdelay_dist.get()
if type == FileGenerator.START_ABSOLUTE:
start = round_datetime_delta(TimeDelta(seconds=delta))
elif type == FileGenerator.START_DURATION:
start = round_datetime_delta(delta * lease.duration.requested)
return start, delta
