Folks,
This is just a warning that LCG may require that all Tier 2
sites can account for space used and available to the larger
LHC VOs.
"Used" is relatively easy, but "available" may require you
to allocate dedicated storage resources (pool groups or whatever)
to at least the major LHC VOs to which you provide resources.
So as an example, if site X is providing 10 TB storage for
Atlas, then those 10 TB will likely have to be dedicated fully
to Atlas, so when the SE publishes "8 TB are available" (if
they have used two), then those 8 TB really are available and
cannot be used by people from another VO.
Non-LHC VOs can share allocations, LCG doesn't care about them
(in this context :-) I am thinking that even if site X primarily
supports Atlas and provides smaller but shared allocations to CMS
and LHCb, that may be OK.
We shall discuss this at the next storage phone conference.
The details are still up for debate, and we can as a group provide
feedback into LCG.
Thanks,
--jens
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