CHTC updates: today's office hours, downtime next week, new twitter

[chtc-users@xxxxxxxxxxx]

Greetings CHTC users,

A few updates for everyone:

Today (Feb 14): There is candy at office hours today, from now until 4:30. Stop by and say hello (http://chtc.cs.wisc.edu/get-help).

Next week (Feb 18): We have a scheduled downtime that affects one of our server rooms:

• Starting tomorrow morning (Feb 15), Gluster-dependent jobs will not run until after the downtime on Feb 18.
  
• Any jobs running on the high-memory servers will be evicted if still running on February 18.
• Other jobs will start and run as usual; however, expect to have fewer jobs running at once as our capacity decreases in preparation for the downtime.
  

See our original email below for full details.

Anytime: We are now on Twitter! Follow @CHTC_UW for tweets about CHTC.

Email us with any questions or concerns at chtc@xxxxxxxxxxx.

Cheers,

the Research Computing Facilitators

---------- Forwarded message ---------
From: <chtc-users@xxxxxxxxxxx>
Date: Thu, Feb 7, 2019 at 3:32 PM
Subject: Interruption to certain HTC services on Monday, February 18
To: chtc-users <chtc-users@xxxxxxxxxxx>

Greetings CHTC users,

This message is for users of our high throughput computing (HTC) system; users of only our HPC cluster may disregard.Â

Due to maintenance in one of our server rooms, a number of HTC system servers will be unavailable during the afternoon of Monday, February 18. These include:

• the high memory servers
• the Gluster file share and transfer server
  
• about half of our execute servers
  

In order to minimize job interruptions, starting on Friday, February 15, we will be implementing the following restrictions:

• Gluster-dependent jobs that haven't started by the morning of Feb 15 will not run until after the downtime on Feb 18.
  
• Jobs not already specifying "WantFlocking" or "WantGlidein" will experience less throughput because they'll only run on the portion of CHTC servers that are unaffected by maintenance; however, no special action is required for such jobs.
  
• (Jobs specifying "WantFlocking" or "WantGlidein" will continue to run as normal, and will be evicted if running on the affected servers when the maintenance window starts.)
• Any jobs running on the high-memory servers will be evicted if still running when the maintenance window begins on Monday, February 18.
  

As always, get in touch with us at chtc@xxxxxxxxxxx with any questions and concerns.

Cheers,

Your CHTC team