LHC Tier 2 Networking BOF Joe Metzger Joint Techs Vancouver 2005

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

North American LHC Site Hierarchy Tier 0CERN Tier 1Regional Archive & Analysis –US BrookhavenATLAS FERMICMS –Canada TRIUMFATLAS Tier 2Analysis Centers –Universities

Data Challenges 1.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. 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 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

Data Challenges 4.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: Q SC5: the whole infrastructure of Tier-1 and Tier-2 sites in place. Simulated data movements between all partners. Date: Q SC6: test of the whole infrastructure at twice the nominal rate. Date: Q SC7: test of the whole infrastructure with real (cosmic) data from the experiments

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

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

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

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

ATLAS Tier 2 Sites BNL Texas Mbps Mbps Oklahoma New Mexico Langston Chicago Mbps Mbps Indiana Mbps Mbps Boston Michigan10 Gbps Harvard

CMS Tier 2 Sites FERMI MIT Florida Nebraska Wisconsin Caltech1+ Gbps Purdue UCSD

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.

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”