"Global Lambdas for Particle Physics Analysis" - Bandwidth Challenge

Supercomputing 2005 - Seattle

Caltech Booth 428. SLAC/FNAL Booth 302

Official UltraLight Page with full details of our winning entry.


We reached a peak speed of 151 Gbits/sec aggregated across the waves connected to the CACR and SLAC/FNAL Booths. We sustained > 100Gbits.sec for more than four hours, equivalent to transferring over one PetaByte in a day. The network traffic was generated by a rich mixture of real physics applications, including bbcp, xrootd, Clarens, Root, gridftp and dCache transfers. We used FAST TCP predominantly, as well as vanilla TCP stacks.

Harvey's presentation, giving full details of the event and partners, is here (~10MByte).

Photographs and Movies:

Movie 1: Walking through the CACR booth, and looking behind the BWC racks

Movie 2: Showing activity in the booth during the BWC measurement on Wednesday evening

Movie 3: A short clip taken at the start of Harvey's presentation at the HP Booth

Movie 4: Iosif tries the Segway

SciNet's Weather Maps during the BWC


Synopsis (as prepared for HP's booth):

The Caltech-CERN-Florida-FNAL-Michigan-Manchester-SLAC entry will demonstrate high speed transfers of physics data between host labs and collaborating institutes in the USA and worldwide. Caltech and FNAL are major participants in the CMS collaboration at CERNís Large Hadron Collider (LHC). SLAC is the host of the BaBar collaboration. Using state of the art WAN infrastructure and Grid-based Web Services based on the LHC Tiered Architecture, our demonstration will show real-time particle event analysis requiring transfers of Terabyte-scale datasets.

We propose to saturate at least fifteen lambdas at Seattle, full duplex (potentially over 300 Gbps of scientific data).
The lambdas will carry traffic between SLAC, Caltech and other partner Grid Service sites including UKlight, UERJ, FNAL and AARnet.
We will monitor the WAN performance using Caltech's MonALISA agent-based system. The analysis software will use a suite of Grid-enabled Analysis tools developed at Caltech and University of Florida. There will be a realistic mixture of streams: those due to the transfer of the TeraByte event datasets, and those due to a set of background flows of varied character absorbing the remaining capacity. The intention is to simulate the environment in which distributed physics analysis will be carried out at the LHC. We expect to easily beat our SC2004 record of ~100Gbits/sec (roughly equivalent to downloading 1000 DVDs in less than an hour).

Bullet Points:

Discovering the Higgs and SuperSymmetry - with a Global Grid
Worldwide collaborations of physicists working together
CERN's Large Hadron Collider experiments: Data/Compute/Network Intensive



Les Cottrell's site: http://www-iepm.slac.stanford.edu/monitoring/bulk/sc2005/hiperf.html

Yang Xia's site: http://www.its.caltech.edu/~yxia/sc2005/

Animated Logo Display: sc2005/SC2005-BWC-Logos.ppt

Handout: (Word)

Booth layout:

Anticipated flows:

GAE Poster:

LHC Data Grid Hierarchy:

COJAC Event:

Black Hole Event (Lucas Taylor/Ianna Osborne):

Some preparations with bbcp:

Presentation at the UltraLight meeting regarding WAN file transfers.

Setting up: