Status of the HLRN-IV installation in Berlin and Göttingen

Last schedule update: 2019-08-05

  • Info and recipes for data migration published on 2019-08-05

General Information

Dear HLRN users,

we want inform you about the next major steps in preparing the operation of the phase 2 of the HLRN-IV complexes in Berlin and Göttingen.

To our regret, due to the high power demands for the computer systems and cooling it is technically impossible for us to make a smooth transition in Berlin from the old to the new HLRN system, and in Göttingen from the phase 1 to the full system, respectively. With the start of the test period of the new HLRN-IV configuration in Berlin the compute resources of the old HLRN-III system (Cray) need to be switched off (forever). Operation of the HLRN-IV system in Göttingen will be interrupted to integrate phase 1 and phase 2. In the following, we provide you with the best technical solution for the transition to the new HLRN-IV system.

Of course, the HLRN team will be happy to give you further information and to assist you in this transition process.

You will find always the up-to-date information on this webpage.

Overall Schedule

The following dates are preliminary and subject to change.

Overview of the schedule for data migration and availability of compute resources in Berlin and Göttingen

Month August September October November December
CW 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
Data migration Berlin D D D
HLRN Service Berlin ST ST ST ST
HLRN Service Göttingen


 

Color coding:     Existing (compute) resources available
    NO resources available
D Data migration (only) continues, access to old HOME and WORK/WORK2 is possible
ST Stability Test phase of the HLRN-IV phase 2
Cray XC40/30 final power down
Begin Acceptance Test of HLRN-IV phase 2

 

Important Dates for HLRN Complex in Berlin

  1. Timeframe for data migration: CW32 - CW47 (05.08. - 24.11.) with service breaks in CW36 (02. - 08.09.) and CW43 - CW44 (21.10. - 03.11.).
    • Please migrate all important data from HOME and WORK/WORK2 on the old HLRN-III (Cray XC40/30) system to the new HOME and WORK of the HLRN-IV system (Atos).
    • Please migrate your data as soon as possible and avoid last-minute actions as transfer bottlenecks may occur at the end of the data migration period.
    • Please note: All data on the old filesystems HOME and WORK/WORK2 will be lost forever after shutdown.
    • To make the migration efficient plan carefully and migrate only necessary data sets. Data in PERM are not required to be migrated. Consider the easy re-creation of data from smaller data sets if possible.
    • More information and recipes for the data transfer are available on this webpage.
  2. Power-off of the HLRN-III Cray XC40/30 in Berlin: CW43, from 21.10.
    • Please note that the Cray system as a compute resource is powered off forever.
  3. Interrupted HLRN service in Berlin: CW43 – CW50 (21.10. - 13.12.)
    • Within this period no HLRN resources are available in Berlin, but in CW45 – CW47 access to data on old HOME and WORK/WORK2 is possible.
    • Selected user groups may obtain early access to the new HLRN-IV phase 2 complex in Berlin from CW47 (18.11.) depending on the stability of the system.

Important Dates for HLRN Complex in Göttingen

At the present time there are still uncertainties in the time schedule of the installation in Göttingen. Please note, that in particular the period of the non-availability of HLRN resources is pessimistically estimated.

  1. Interrupted HLRN service phase 1 in Göttingen: CW50/2019 – CW05/2020 (09.12.2019 – 31.01.2020)
    • f you plan to use the HLRN resources in Berlin during this service break in Göttingen we recommend to copy data from Göttingen to the new HOME/WORK in Berlin before the shutdown of the Cray system (CW43, 21.10.2019) during the data migration period in Berlin.
  2. In Göttingen, there is no action required to migrate data since the current HOME and WORK will be part of the full HLRN-IV complex.


 
Norddeutscher Verbund für Hoch- und Höchstleistungsrechnen
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