[Snic-users] Triolith and Gamma unavailable for 1-4 hours on Thursday, December 8th

[Mats Kronberg]

Due to unexpected hardware problems (the delivered spare parts were
broken) this will take a little more than the estimated 1-4 hours.

NSC apologizes for the inconvenience.

We will email you when Triolith and Gamma are available.

-- 
Mats Kronberg, NSC Support <support at nsc.liu.se>




On Mon, Nov 28, 2016 at 9:48 AM, Mats Kronberg <kronberg at nsc.liu.se> wrote:
> Dear NSC users,
>
> On December 8th, Triolith and Gamma will be shut down for a short time.
>
> Start of downtime: 2016-12-08 08:30 CET
> Estimated duration of downtime: 1-4h
>
> Why: During this stop NSC will perform hardware maintenance. Due to
> unfortunate design choices by the storage system vendor, some cables
> (one of which is broken) are very difficult or impossible to replace
> while the system is running. Rather than risking an unplanned outage
> (which would require all users with running jobs to investigate,
> cleanup and resubmit failed jobs) we will perform this maintenance
> while no jobs are running.
>
> If you have any questions regarding this, please contact support at nsc.liu.se.
>
>
> Details
> -------
>
> All login nodes (including ThinLinc) and compute nodes will be
> unavailable during this time, and might be restarted during the stop.
>
> Queued jobs will only start if the time limit requested (i.e "sbatch
> -t DD-HH:MM:SS") is less than the time remaining before the start of
> the downtime.
>
> If you need to run jobs in the week before the downtime, you might
> need to shorten your jobs.
>
> Jobs that are in the queue before the downtime will remain in the
> queue, and will be started normally after the downtime.
>
>
> Opportunities
> -------------
>
> If your project has a low priority due to having run a lot recently,
> you might find it much easier than usual to get short jobs started in
> the days immediately before downtime as they don't have to compete
> with longer jobs. However, please note that core hours used for such
> jobs will still be counted, so your priority will be even less after
> the downtime if you take advantage of this.
>
>
> --
> Mats Kronberg, NSC Support <support at nsc.liu.se>