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Downtime Announcement: The winter cooling tower maintenance for the SciNet data centre will take place on March 24 and 25, 2026, starting at 7:00 a.m. on the 24th. All SciNet systems (Trillium, OnDemand, Balam, S4H, Teach, as well as hosted equipment) will have their compute nodes shut down. Login nodes, file systems, and the HPSS system will remain available, and jobs will be held in the queue until maintenance is complete. Starting 7am on Mar 23, users are encouraged to submit small and short jobs that may be scheduled before the maintenance begins. Fri Feb 20, 2026, 11:35 pm: Power glitch, ~480 compute nodes rebooted. Regional power quality has been quite poor lately (1, 2). Thu Feb 19, 2026, 3:00 pm: Systems restored. Please report issues to support@scinet.utoronto.ca. Tue Feb 17, 2026, 8:40 am: Power outage at the data centre. Cooling issues have developed as a result. Major systems (Trillium, S4H) are expected to be down until sometime Thursday. Login nodes and file systems will remain accessible. Mon Feb 16, 2026, 8:40 pm: Electricity is unstable in the data centre area due to severe snowfall. Thu Jan 29, 2026, 1:40 pm: All services are operational again. Thu Jan 29, 2026, 12:00 pm: The Trillium and Open OnDemand compute nodes are operational again. We are still working on bringing Balam, Neptune and S4H nodes up again. Thu Jan 29, 2026, 10:00 am: There was a power glitch at the data centre overnight. The login nodes are accessible but the compute nodes are down.
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