Fermilab Computing Division

CS Document 497-v2

WAN Emulation Development and Testing at Fermilab

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Submitted by:
JoAnn Larson
Updated by:
Andrey Bobyshev
Document Created:
20 Sep 2004, 15:06
Contents Revised:
23 Sep 2004, 15:44
Metadata Revised:
20 Jan 2005, 09:35
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23 Sep 2004, 15:41
20 Sep 2004, 15:06
The Compact Muon Solenoid (CMS) experiment at CERN’s Large Hadron Collider (LHC) is scheduled to come on-line in 2007. Fermilab will act as the CMS Tier-1 centre for the US and make experiment data available to more than 400 researchers in the US participating in the CMS experiment. The US CMS Users Facility group, based at Fermilab, has initiated a project to develop a model for optimizing movement of CMS experiment data between CERN and the various tiers of US CMS data centres and to design a WAN emulation facility which will enable controlled testing of unmodified or modified CMS applications and TCP implementations locally under conditions that emulate WAN connectivity. The WAN emulator facility is configurable for latency, jitter, and packet loss. The initial implementation is based on the NISTnet software product. In this paper we will describe the status of this project to date, the results of validation and comparison of performance measurements obtained in emulated and real environment for different applications including multistreams GridFTP. We also will introduce future short term and intermediate term plans, as well as outstanding problems and issues.
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Fermilab Publication number CONF-04-464-CD
Associated with Events:
CHEP2004 held from 27 Sep 2004 to 01 Oct 2004 in Interlaken, Switzerland
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