# Presentation: 442977

## Report from U.S. Representative to the LCG Grid Deployment Board

## LCG GDB Goals

- Big rush to decide things _for the short term_ in order to have a “production” LCG in the summer and get experience
- Agree on middleware to be run everywhere (and other software infrastructure)
- Agree on what “contributing resources” means
- Agree on security infrastructure
- Agree on who is going to “operate” and what it means
- Start to think about what “user support” means

- Vicky White, Fermilab

## GDB reality (as I see it)

- Valuable forum for discussion.
- There should be even more structured discussion
- LCG will happen and evolve, based more on what experiments are actually doing, than on what is said/written by GDB

- Vicky White, Fermilab

## GDB reality (as I see it)

- Ongoing opportunity to really figure out
- What the LHC Computing Grid really is
- Some minimal attempt to define it by WG3
- What additional work must be done by someone (Grid projects, experiments, LCG subprojects, participating institutions, etc)
- For security infrastructure
- To adapt or interface Site Fabrics to the Grid
- To “harden” Grid software and make a SYSTEM that works, instead of a bucket of tools without a coherent overall system design
- The policy and resource allocation issues for the long term

- Vicky White, Fermilab

## LCG Resources

- Table of total resources available for LHC work put together by Alberto Masoni
- Started with view of each Tier 1 or Tier 2 site contributing N cpus, X disk, T tapes
- Much confusion between resources acquired/made available for use by LHC experiments and resources to be “contributed” to the LHC Computing Grid
- Aggregated now to total resources by region
- Assumed that in the end all resources made available for LHC experiments will be “part of” or “joined” with the LHC Computing Grid.  However, the timescale for this and the path from now to then is still unclear

- Vicky White, Fermilab

## US View

- We expect to be part of a Grid (not part of a controlled distributed computing center)
- We expect emphasis on standards and interfaces
- We expect aggregates of Tier 1+Tier 2 centers to together become part of the LCG and to share administrators, security contacts, operational responsibilities

- Vicky White, Fermilab

## US View

- We expect resource contributions to the LCG from the US to be aggregates for ATLAS and for CMS and not specific numbers of CPUs from specific sites
- We expect to make use of our large investments in Grid Testbeds and Grid middleware
-  made through US LHC Computing projects and US funded Grid projects

- Vicky White, Fermilab

## US View

- We expect most of our dedicated LHC computing resources (funded through the LHC Computing projects) to rapidly be made available to participate in the LCG
- We expect other potential resources at Tier 1 and Tier 2 sites and quite possibly at other HEP and CS collaborator sites to be made available opportunistically
- provided LCG is a Grid, not a distributed computing center

- Vicky White, Fermilab

## US View

- We expect emerging CMS and ATLAS Grid testbeds to morph into LCG
- We expect the process of resource allocation to be done globally only at the highest level of granularity
- (e.g.  ATLAS will be running DC in March and need 70% of the resources in the US)
- We expect local policies to be respected
- Eg. We run no LHCb jobs

- Vicky White, Fermilab

## US View

- We expect discussions on all of the WG topics (Grid components, Resource allocation, Security, Operations and User Support) _to go on for a long time_, to evolve into _common understandings_ slowly and to need much work to be done to implement the whole system.

- Vicky White, Fermilab

## US View

- I am working within the GDB to explain and propagate the above US view
- As chair of WG2
- As participant in WG3 (not met yet)
- By participation in meetings/discussion
- By constructive criticism of draft docs that in some cases are not consistent with this US view
- By informal discussions
- By encouraging US interested parties to read and comment on all materials coming from the GDB

- Vicky White, Fermilab

## GDB Information

- _[http://lhcgrid.web.cern.ch/lcg](http://lhcgrid.web.cern.ch/lcg)_
- GDB web site. WG charges. Draft docs (under minutes of last meeting)
- US email list and discussion forum
- us-lcg-gdb@fnal.gov
- http://listserv.fnal.gov/archives/us-lcg-gdb.html

- Vicky White, Fermilab