LHC Computer Grid - Rollout
> [mailto:[log in to unmask]] On Behalf Of Ben Waugh said:
> I don't think it was the intention that every T2 site would have to
> provide infinite amounts of permanent storage, and I don't
> think many T2
> sites will be able to do this. If this means that our processing power
> will remain unused, then there seems little point in having a
> second tier at all.
It might be interesting to look at the RTAG 6 report:
http://lcg.web.cern.ch/LCG/sc2/RTAG6/finalreport.doc
although it isn't very specific. It suggests:
3.2.2 Tier2
§ CPU cycles (Grid enabled computing elements)
§ Disk storage, maybe temporary only (Grid enabled storage elements)
§ May have mass storage
§ Sufficient network bandwidth for inter-operability
§ A weaker commitment to provide access to data over LHC lifetime
§ A weaker commitment to provide long-term access to specific analysis
data
§ A weaker commitment to resource upgrades
§ Focused user support
§ 24/7 service but with no guaranteed short-time "crash" response
Stephen
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