[Triolith-users] Important: Triolith two week service stop starting August 26th

[Mats Kronberg]

This is just a reminder about the service stop on Triolith starting
Monday 09:00. For details, see my earlier email below.

regards,

//Mats


On Wed, Aug 14, 2013 at 1:49 PM, Mats Kronberg <kronberg at nsc.liu.se> wrote:
>
> Dear Triolith users,
>
> Summary:
>
> Starting August 26th, Triolith will be unavailable due to it being
> expanded by 400 nodes and moved to NSC's new computer room. The outage
> will last approximately two weeks, but parts of Triolith will be
> available again from August 27nd.
>
>
> Details:
>
> As you may or may not know, Triolith will be expanded with 400
> additional nodes. NSC has also built a new computer room / data center
> building, and Triolith will be moved to it.
>
> Starting August 26th at 09:00 CEST, Triolith will be shut down, and
> the process of disassembling and moving it will start.
>
> No jobs will be started unless they can finish before 09:00 on the
> 26th. You might need to adjust the wall time limit of your jobs if you
> need them to start during the period August 19th - 26th.
>
> Due to the complexity of the move, it is hard to predict exactly how
> long the entire process will take. If we run into any unexpected
> technical problems, things can be delayed. It's also entirely possible
> that the move will go faster than expected.
>
> Our current best schedule estimate is:
>
> Monday week 35 (2013-08-26): Service stop starts at 09:00. The login
> nodes and a small number (24-48) of compute nodes should be available
> again in the evening. The compute nodes will probably be restricted to
> short jobs (like the current "devel" nodes).
>
> Tuesday or Wednesday week 35: Additional compute nodes (bringing the
> total to ~288) becomes available.
>
> The remaining 912 compute nodes will be brought back online as soon as
> they can be moved, connected to the system and tested. The vendor
> estimates that all 1200 original nodes will be ready by the end of
> week 36.
>
> Once the original 1200 nodes have been moved, the additional 400 nodes
> will be installed and tested. The acceptance test period for these
> nodes will last approximately a month. Sometime during this period
> there will be one or more short (up to a day) service stops of the
> entire Triolith system in order to run full system tests.
>
>
> If you have any questions regarding this, please contact support at nsc.liu.se.
>
> --
> Mats Kronberg, NSC Support <support at nsc.liu.se>