19-Jul-2021

Upcoming Schedule for Summer Down

This table summarizes important dates for CLASSE-IT during the 2021 summer down. For more information on each item, please see the detailed announcements below.

Day		Time		Action
Tue 20-Jul		8:00 AM to 12:00 noon		AppsAnywhere outage
Mon 26-Jul		8:00 AM until end of power outage		Compute Farm: capacity reduced
Wed 28-Jul		7:00 AM		Compute Farm: interactive & CHESS jobs terminated
Tue 03-Aug		9:00 AM to 12:00 noon		General CLASSE network outage

AppsAnywhere Upgrade: Tuesday, 20-Jul-2021 @ 8:00 AM

On Tuesday, 20-Jul-2021, from 8:00 AM to 12:00 noon, the AppsAnywhere service will be upgraded. We expect applications to be unavailable for up to an hour somewhere within this window. During that time, any applications that are active might report that there is an interruption; they will resume when the connection returns. Applications that are "offline allowed" will not be affected. If you have any questions or concerns, please submit a ServiceRequest.

Compute Farm Reduced Capacity: Week of 26-Jul-2021 @ 8:00 AM

Starting Monday, 26-Jul-2021 @ 8:00 AM, most CLASSE Compute Farm batch queues will be disabled in advance of the Wilson Lab East Module power outage on Wednesday, 28-Jul-2021. Please note that interactive and CHESS queues are excluded from this two-day pre-outage pause; jobs running in these queues will instead be terminated early morning on Wednesday, 28-Jul-2021, when the East Module power is cut.

Any terminated jobs can be resubmitted immediately to the "all.q" and "interactive.q" queues for continued processing throughout the power outage (likely through Friday, 30-Jul-2021). This continuity of service is made possible by two new farm nodes that have been deployed in Wilson 221. However, farm capacity will be severely degraded, so you may need to wait for resources to become available before your job is scheduled.

CLASSE Network Outage: Tuesday, 03-Aug-2021 @ 9:00 AM

On Tuesday, 03-Aug-2021, from 9:00 AM to 12:00 noon, there will be a general network outage for a central firewall upgrade. Please save your work to samba (central filesystems) and log out of your computer before this time. During this network outage, remote access to CLASSE resources and websites will be unavailable. Please submit a ServiceRequest with any questions or concerns, and consider subscribing to the classe-it-news-l mailing list for additional announcements and information.

macOS Mojave Deprecation

This fall, when the next version of macOS (Monterey) is released, the supported versions of macOS will be macOS 10.15.x (Catalina), macOS 11.x (Big Sur), and the newest version of macOS (Monterrey). Macs running macOS 10.14.x (Mojave) or earlier will need to be upgraded to macOS 10.15 or newer by the end of 2021 in order to comply with Cornell University security requirements. Also, some recent Mojave security updates have broken Kerberos, making it impossible to log into the affected Macs with CLASSE credentials. To schedule an upgrade of your CLASSE-managed Mac, please submit a ServiceRequest. To see what version of macOS your Mac is running, select "About This Mac" under the Apple menu () in the upper left corner of your screen. The upgrade process takes around half a day and may require you to bring your Mac to the lab.

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General network and server maintenance will occur every Tuesday from 12:00 noon to 2:00 PM. The CLASSE-IT group will always announce any expected disruptions in our NewsLetter and via CLASSE-IT-NEWS-L, but with the size and complexity of our network there is always the potential for something to go wrong. We will do our best to contain all network maintenance and planned outages to Tuesdays from 12:00 noon to 2:00 PM.

Unless other arrangements have been made, CLASSE-managed Windows systems may be updated and rebooted on Tuesday morning at 2:00 AM, so please avoid critical or lengthy operations at that time. For more details, please see SystemExpectations.

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Questions or problems? Submit a service request (or email service-classe@cornell.edu).

Other resources:

• CLASSE-IT Home Page
• Previous newsletters

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