CSCS LCG Tier-2 Upgrade Planning Page

Middleware upgrade

Summary

upgrade dCache 1.9.2, SL5 ?

Details

Upgrade of WNs to SL5

CMS has initiated a site poll: https://twiki.cern.ch/twiki/bin/view/CMS/Poll-T1T2-SLC5

From the CMS Facility operations meeting 2009-06-14:
Status of LHC VOs on the topic is that CMS, LHCb and ALICE expect to run SL4 binaries in SL5/64bit systems smoothly, while ATLAS requires to disable (partly) SELinux in order to run in compatibility mode. GDB has to deal with this. There are remaining issues still to be tackled (e.g. distribution of SL4/SL5 compatibility libraries, gcc-4.3 compiler installation - or distribution of runtime libraries), but not very relevant for CMS: we are ready to run SLC5. As long as the experiments primary platform is SL4, the interactive services (e.g. lxplus), Grid UI, build servers need to be maintained (and the ‘alias’), i.e. they do not plan to build/prepare SL4 binaries on SL5 systems. More details here. So, the GDB recommendation to WLCG sites is to start migration after STEP'09. CMS is recommending to all CMS sites to migrate asap, see dates on slides. On CMS constraints from sw, again see slides. The proposal for CMS SLC5 migration at CERN is to migrate asap the T0 and CAF WNs, between CRUSET and CRAFT, i.e. July 5-10. For more details, and testing status, see slides. For constraints from physics, all details in slides.