1. LHC Tier 2 Networking BOF
Joe Metzger
Joint Techs Vancouver 2005

2. LHC: Accelerator at CERN. Used by physicists from around the world.

4. 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

5. Data Challenges
SC1: initial tests between some Tier-1 sites and CERN. Datafiles transported from disk to disk using globus_url_copy. Date: December Result: tests were done with BNL, CCIN2P3, Fermilab, FZK and SARA.
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.
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.

6. Data Challenges
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
SC5: the whole infrastructure of Tier-1 and Tier-2 sites in place. Simulated data movements between all partners. Date: Q1 2006
SC6: test of the whole infrastructure at twice the nominal rate. Date: Q2 2006
SC7: test of the whole infrastructure with real (cosmic) data from the experiments

7. 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

8. 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

9. ATLAS Tier 2 Sites TRIUMF
University of Victoria
WestGrid
University of Alberta
University of Toronto
Carleton University
University de Monreal

10. 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

11. ATLAS Tier 2 Sites BNL 2005 2006 Texas 200-500 Mbps 500-1000 Mbps
Oklahoma
New Mexico
Langston
Chicago
Mbps
Indiana
Mbps
Boston
Michigan
10 Gbps
Harvard

12. CMS Tier 2 Sites FERMI 2005 2006 MIT Florida Nebraska Wisconsin
Caltech
1+ Gbps
Purdue
UCSD

13. Tier 2 Light Path Plans U Texas U Chicago Indiana U. CaltechNo
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.

14. Summary Synopsis of LHC Tier 2 Networking Web Page
Mailing list to discuss US LHC networking.
Send message to with a subject of “subscribe lhc-us-net”