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Question |
Alice |
Atlas |
CMS |
LHCb |
Can the experiment run on SL6? |
yes but tested only on small scale |
yes, but still some compilation problems with analysis rels |
yes, in compatibility mode working on native exec |
yes, in compatibility mode working on native exec. Most of the sw stack is already on SL6 native |
Can the experiment run on mixed clusters? |
yes |
no |
yes in compatibility mode but would prefer different queues so there are no problems when SL6 native executables are introduced |
yes, but would prefer separate queues to avoid having to blacklist both OSs in case things went wrong |
Big bang or gradual upgrade? |
gradual allows to find any problem without risks |
gradual but can cope with big bang if sites need |
gradual |
doesn't matter as can run on mixed clusters |
Does the experiment have already SL6 sites? |
a few small sites |
SARA T1 and US atlas site, Brunel (only prod) |
half USCMS and few test sites in EU (Brunel, Desy, CNAF) |
some sites |
Are there time constraints? |
no |
prefer sites NOT to upgrade before 1st June 2013 |
no indicatively would prefer summer though |
no |
Do the experiments have an upgrade procedure in place? |
yes, but informal |
yes, two linked from TF page see below |
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Communication with sites |
site contacts list, EGI ops |
central ops and cloud support |
local experts |
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Test procedure |
yes |
several sites with test queues |
yes, if sites strongly require |
yes |