LHC Tier 2 Networking BOF
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Transcript of LHC Tier 2 Networking BOF
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LHC: Accelerator at CERN.Used by physicists from around the world.
http://www.ilrasoiodioccam.it/articoli/lhc.html
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http://hepweb.rl.ac.uk/ppUKpics/images/POW/1999/990303.jpg
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North American LHC Site Hierarchy
• Tier 0 CERN• Tier 1 Regional Archive & Analysis
– US• Brookhaven ATLAS• FERMI CMS
– Canada• TRIUMF ATLAS
• Tier 2 Analysis Centers– Universities
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Data Challenges1. SC1: initial tests between some Tier-1 sites and CERN. Datafiles
transported from disk to disk using globus_url_copy. Date: December 2004. Result: tests were done with BNL, CCIN2P3, Fermilab, FZK and SARA.
2. SC2: sustained file transfers with an aggregated rate of 500 MByte/sec out of CERN. Disk to disk using software components from the radiant service at CERN. Participating sites: CCIN2P3, CNAF, Fermilab, FZK, RAL, SARA. Date: last two weeks of March 2005.
3. SC3: sustained file transfer simultaneously to 6 Tier-1 sites. Disk to tape (at 60 MByte/sec) using SRM. Participating sites: CCIN2P3, CNAF, Fermilab, FZK, RAL, SARA. Date: July 2005.
http://lcg.web.cern.ch/LCG/PEB/gdb/ServiceChallenges.htm
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Data Challenges4. SC4: sustained file transfer simultaneously to all 10 Tier-1 and
some Tier-2 sites. Inclusion of data processing on farms at CERN and at the Tier-1 sites. Date: Q4 2005
5. SC5: the whole infrastructure of Tier-1 and Tier-2 sites in place. Simulated data movements between all partners. Date: Q1 2006
6. SC6: test of the whole infrastructure at twice the nominal rate. Date: Q2 2006
7. SC7: test of the whole infrastructure with real (cosmic) data from the experiments
http://lcg.web.cern.ch/LCG/PEB/gdb/ServiceChallenges.htm
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ATLAS Tier 2 Sites BNL
• University of Texas at Arlington• University of Oklahoma• University of New Mexico• Langston University• University of Chicago• Indiana University• Boston University• Harvard University• University of Michigan
http://lcg.web.cern.ch/LCG/PEB/gdb/LCG-Tiers.htm
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CMS Tier 2 Sites FERMI
• MIT
• University of Florida, Gainesville
• University of Nebraska, Lincoln
• University of Wisconsin, Madison
• Caltech
• Purdue University
• University of California, San Diego
http://lcg.web.cern.ch/LCG/PEB/gdb/LCG-Tiers.htm
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ATLAS Tier 2 Sites TRIUMF
• University of Victoria
• WestGrid
• University of Alberta
• University of Toronto
• Carleton University
• University de Monreal
http://lcg.web.cern.ch/LCG/PEB/gdb/LCG-Tiers.htm
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Data Challenge Survey
• Sent to Network contacts at Universities
• Questions– Expected 05 Data Rates for long flows– Expected 06 Data Rates for long flows– Upstream Provider– Light Paths– Contact Info
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ATLAS Tier 2 Sites BNL2005 2006
Texas 200-500 Mbps 500-1000 Mbps
Oklahoma
New Mexico
Langston
Chicago 100-500 Mbps 500-1000 Mbps
Indiana 100-500 Mbps 100-1000 Mbps
Boston
Michigan 10 Gbps 10 Gbps
Harvard
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CMS Tier 2 Sites FERMI
2005 2006
MIT
Florida
Nebraska
Wisconsin
Caltech 1+ Gbps 1+ Gbps
Purdue
UCSD
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Tier 2 Light Path Plans
• U Texas– No
• U Chicago– Initially not, though we do have capabilities to do so. At UC, we
connect to Starlight via optical links provided by I-WIRE. • Indiana U.
– Initially not, though we do have capabilities to do so. • Caltech
– We'll experiment on-demand network path setup dynamically using Monalisa service agents and GMPLS.
• U Michigan– We are an UltraLight collaborating site and will utilize dedicated
light-paths, QoS/MPLS and high-performance protocols (like FAST) to do our Service Challenge work.
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Summary
Synopsis of LHC Tier 2 Networking
Web Page
Mailing list to discuss US LHC networking. [email protected]
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