def _record_initial_stats(self):
'''
Report initial job stats (such as start time) by adding a
uiapi.job_stats record to the db.
'''
job_stats = JobStats(oq_job=self.oq_job)
job_stats.start_time = datetime.utcnow()
job_stats.num_sites = len(self.sites_to_compute())
calc_mode = CALCULATION_MODE[self['CALCULATION_MODE']]
if jobconf.HAZARD_SECTION in self.sections:
if calc_mode != 'scenario':
job_stats.realizations = self["NUMBER_OF_LOGIC_TREE_SAMPLES"]
job_stats.save()
