Purpose: Urgent service work required to ensure UCSD mainframe operations – immediate tasks are needed to restore full reliability and address a critical issue affecting the mainframe platform.
Impacted services Mainframe (all production workloads). Student systems that depend on the mainframe, including MyTritonLink and every application accessed through it. Instructional tools listed on the UC San Diego Instruction Tools page – these may be unavailable or not function properly during the window.
What users can expect All of the services above will be offline for the two‑hour window. Authentication attempts may return errors; no data will be lost—transactions are paused and will resume automatically once the system is back online.
Recommended actions Complete any critical work that requires these systems before 9 p.m. Avoid submitting applications, enrollment changes, or other time‑sensitive transactions during the outage. Monitor the UC San Diego status page for real‑time updates; an announcement will be posted 30 minutes before the outage begins and updates will be posted roughly every 15 minutes while the work is in progress. If you encounter issues after the maintenance window, contact the ITS Service Desk or email servicedesk@ucsd.edu.
Why this emergency window? A critical condition was identified on the mainframe that could impact system stability and data integrity. Immediate service work is required to prevent potential downtime and to maintain reliable operations for all dependent applications.
Posted Apr 23, 2026 - 13:14 PDT
This scheduled maintenance affected: Academic Services.