[Snic-users] Tetralith and Sigma unavailable starting 2022-04-05 08:00 CEST

[Mats Kronberg]

Tetralith and Sigma are now available again and you are welcome to log
in.

Mats Kronberg <kronberg at nsc.liu.se> writes:

> Dear Tetralith and Sigma users,
>
> Tetralith and Sigma will be unavailable on April 5th from 08:00
> CEST. Estimated duration: most of the day.
>
> Details:
>
> NSC has installed new UPS systems in the Kärnhuset computer room.
>
> We need to turn off power to complete the installation, and then run a
> load test to verify that the delivered system performs as promised.
>
> During this maintenance window we will also move parts of the storage
> system and do other required maintenance and apply software updates.
>
> This means that you will not be able to access Tetralith or Sigma at all
> during this work as it will be turned off. This include your data on the
> Centre Storage storage system (/home and /proj).
>
> We have scheduled this for 2022-04-05, starting at 08:00 CEST. The work
> will probably take most of the day, but we estimate that Tetralith and
> Sigma will be available again late afternoon or evening.
>
> Queued jobs that cannot be completed before 08:00 will not be
> started. All logged-in users will be logged out at 08:00. Queued jobs
> will remain in the queue and be started normally when the clusters are
> back online.


-- 
Mats Kronberg
National Supercomputer Centre (NSC)