====== 20220314 / Massive Upgrade coming ======

Hi all,

We have a **Massive Upgrade** coming this spring!

  * From debian 9 to debian 11
    * to support both new hardwares and new softwares
    * new cluster with new upgrades already available (Cascade)
    * every binary must be rebuild
    * new ways of sharing programs
    * new ways of installations

    Use the web forms when software are missing. We will find the most suitable way for installation(s).

    * See below new documentation about R, Python, Perl...

  * From SGE to Slurm
    * GridEngine have served us well for years, but it can't keep up as we continue to grow (over 30k cores this year),
    * We choose slurm because it is used on national and international centers
    * better reservation, cleaner exit
    * New examples scripts : [[https://github.com/ltaulell/submission_scripts]]
    * Slurm offer more freedom and more responsabilities!

  * New documentation
    * [[https://meso-centres-lyon.pages.in2p3.fr/psmn-rtd/index.html]]
    * New enforced rules around filesystems and storage
    * Follow rules for a smooth PSMN use

  * We will have to physically re-organize clusters (E5 and Cascade), to double Cascade, and halve E5.

  * We will propose meetings and courses to ease the transition, group by groups

  * Cons:
    * all scratchs will have to be destroyed (we go from v3 to v8, data will not be readable, we must restart from zero)
    * E5 and Cascade will have to be turned off for weeks (2 to 4)

  * Timeline: ASAP! We want to migrate as fast as possible (endline first of june 2022)
    * See [[http://www.ens-lyon.fr/PSMN/doku.php?id=news:blog]] and [[http://www.ens-lyon.fr/PSMN/doku.php?id=news:evolutions]] for more updated informations

{{tag> upgrade tous.psmn}}