June 2025

Date: Tuesday, July 1, 2025 (06:00-16:00)

Who is affected:
All users of the CS department storage or computing facilities.

What is happening:
We are upgrading our storage operating system, which requires the
components of the CS storage system to be rebooted. This upgrade is
expected to be mostly non-disruptive, and department services will continue
as usual, but sporadic moments of interruption may be noticeable at times.

All services that depend upon access to storage share the same minor risk
of performance hiccups for some periods during this window, including cycle
servers, ionic and neuronic clusters, web content, home directories, CIFS,
etc.

Why is it happening:
Our current operating system has reached end-of-life status and needs an
upgrade.

While we do not anticipate any extended service outages, you may find that
there are momentary interruptions, and some connections (especially
CIFS/SMB connections) may need to be reestablished.

We will post updates to the status page: www.csstaff.org
as necessary.

If this downtime will cause you undue hardship, please contact
csstaff@cs.princeton.edu immediately, so we can discuss options to reduce
any negative impact. Your patience is appreciated.

Sincerely,
CS Staff

Date: Monday, June 9, 2025 (07:30-08:00)

Who is affected:
All users of CS Department networked services, including email, web
service, and HPC computing.

What is happening:
Critical backbone switches will be upgraded to newer firmware and
rebooted.

We expect no lasting negative impacts from this maintenance.

Why is it happening:
Firmware upgrades are necessary on a few devices to address bugs that are
slowing progress on our Summer project list.

We will post updates to the status page: www.csstaff.org
as necessary.

If this downtime will cause you undue hardship, please contact
csstaff@cs.princeton.edu immediately, so we can discuss options to reduce
any negative impact. Your patience is appreciated.

Sincerely,
CS Staff