What you exactly mean down time and uptime? If Datastage is down, you cant expect the universe tables to be updated. Or do you need the timestamp of Datastage engine stop and start? Even its not recorded, as far as I have noticed.
Impossible doesn't mean 'it is not possible' actually means... 'NOBODY HAS DONE IT SO FAR'
It's not logged, unless you change the start up script to have dsrpcd do minimal logging (-d1 on its command line and redirect output to a log file rather than to /dev/null).
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