The scripts are registered to the ClearCase scheduler (starting from ClearCase 4.0), on our vob server. They run about every hour (apart at night).
They run the Rational provided scripts from /usr/atria/config/scheduler/tasks with the default settings and no change.
The logs are found in the vob server at /var/adm/atria/log/sync_logs, but are deleted by default after successful execution. Mail is currently sent instead.
Note that in addition, the admin crontab checks the vobs once a week on Saturdays at 0:05.