Experimental Physics and
Industrial Control System

        if userPolicyOverride == 'some-example-policy':
            keep_months = 6
        [...]

        # hold - gather is the minimum number of files that will be retained
        # Empirically it seems to hold one less than requested, so we add two.
        hold = keep_months + 2
        gather = 1

        sts_url = 'pb://localhost?name=STS&rootFolder=${ARCHAPPL_SHORT_TERM_FOLDER}&partitionGranularity=PARTITION_15MIN&consolidateOnShutdown=true'
        mts_url = 'pb://localhost?name=MTS&rootFolder=${ARCHAPPL_MEDIUM_TERM_FOLDER}&partitionGranularity=PARTITION_DAY&hold=2&gather=1'
        lts_url = 'pb://localhost?name=LTS&rootFolder=${ARCHAPPL_LONG_TERM_FOLDER}&partitionGranularity=PARTITION_MONTH&hold=%d&gather=%d' % (hold, gather)
        blackhole_url = 'blackhole://localhost'
        data_stores = [sts_url, mts_url, lts_url, blackhole_url]

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