The slc 5 6 upgrade issue
This presentation is the property of its rightful owner.
Sponsored Links
1 / 6

The SLC 5.6 upgrade issue PowerPoint PPT Presentation


  • 79 Views
  • Uploaded on
  • Presentation posted in: General

The SLC 5.6 upgrade issue. Helge Meinhard CERN-IT GDB, 09-Feb-2011. What Happened – User P erspective. LHCb (and LCD) use tcmalloc.so glibc dependent May require recompilation when glibc changes Not part of SLC Code run on RHEL/SLC 5.6 without recompiling tcmalloc.so broke

Download Presentation

The SLC 5.6 upgrade issue

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


The slc 5 6 upgrade issue

The SLC 5.6 upgradeissue

HelgeMeinhard

CERN-IT

GDB, 09-Feb-2011


What happened user p erspective

What Happened – User Perspective

  • LHCb (and LCD) use tcmalloc.so

    • glibc dependent

      • May require recompilation when glibc changes

    • Not part of SLC

  • Code run on RHEL/SLC 5.6 without recompiling tcmalloc.so broke

  • Emergency work-around needed checking whether running on 5.5 or 5.6

    • (Not using rpaths may have avoided the problem)


What happened service provider perspective 1

What happened – Service Provider Perspective (1)

  • 5.6 release history:

    • RedHat released RHEL 5.6 on 13-Jan

    • CERN released SLC 5.6 on 20-Jan

    • FNAL released SL 5.6 last week

  • CERN rolled out SLC 5.6 on desktops and central systems around 28-Jan

  • Announcement channels:

    • Desktops: [email protected], http://cern.ch/linux

    • Central systems: [email protected], motd on lxplus


What happened service provider perspective 2

What happened – Service Provider Perspective (2)

  • Testing before roll-out:

    • Test repositories for desktops (about one week)

    • Central systems: 10% lxplus capacity for about one week


Certification policy

Certification Policy

  • Major releases (e.g. SLC6): full certification cycle of several months

  • Minor releases:

    • Security updates, bug fixes, functionality enhancements

    • Formal certification not considered necessary so far by Linux certification group


Cern it proposal

CERN-IT Proposal

  • Keep process lightweight

    • No formal certification for minor releases

    • About one week for testing

  • Improve communication

    • Announcement to LHC Architects’ Forum

    • AF responsible for disseminating the information to experiments


  • Login