Welcome to NWSC Operations

NWSC Availability Window

NCAR & UCAR Notices

Event Date Details
Yellowstone, Geyser and Caldera, Erebus, CISL Status SCHEDULED OUTAGE Feb 3 2015 - 6:00am to 2:00pm SCHEDULED OUTAGE, CHANGE CONTROL NOTIFICATION

All of Yellowstone, Geyser and Caldera will be down for system maintenance on February 3, 2015 from 0600 until 1400.

During this outage all the nodes will also be rebooted.

START: Tue Feb 3 2015 6:00 AM MST

Geyser and Caldera

During the first two hours of the Yellowstone outage scheduled concurrently on 2/3/15, NETS will reboot all eight QFX 3500 switches at NWSC to upgrade their JUNOS firmware:
Glade services will be interrupted during this time period

To prepare for the downtime, a system-wide reservation will be put in place on Friday, January 30, at 5 p.m. MST. Once the reservation is in place, the LSF scheduler will be unable to launch new jobs with run times that stretch into the reservation window; such jobs will remain pending until after the maintenance period. Initially, this is more likely to affect certain users who have very long runtime exceptions on Geyser.

Any jobs still running at 6 a.m. February 3 will be killed by the system administrators.

Among the scheduled maintenance tasks is rebooting of the Yellowstone login and compute nodes to address higher than expected occurrences of out-of-memory conditions and related issues. Those appear to have resulted from the accumulation of memory leaks in kernel and system processes during a roughly 180-day period of up time for most of the Yellowstone compute nodes.

NETS will be replacing the Ethernet switch ml-312-c1-gs. Feb 4 2015 - 5:30am to 7:30am All devices directly connected to this ethernet switch will experience an outage of up to 2 hours while the hardware is replaced. This also affects wireless access points that serve the same area. This ethernet switch serves ML Tower A, floors 2 thru 6

For a detailed list of room numbers/ports affected, please visit

START: Wed Feb 4 2015 5:30 AM MST
DURATION: 2 hours

Replacement of the NETS UPS in the Marshall Comm Room Feb 4 2015 - 7:00am to 7:30am Replacement of the NETS UPS in the Marshall Comm Room. This will cause a very short outage as the power is shifted to the new UPS.