-=-=-=-=-= Beginning of submission data (step 1)=-=-=-=-=- Contact Person: Name: Richard Hughes-Jones Address: HEP Group Department of Physics and Astronomy The University of Manchester Manchester M13 9PL Phone: +44 161 275 4117 Fax: +44 161 273 5867 Email: R.Hughes-Jones@man.ac.uk Title: High Bandwidth High Throughput Data Transfers in the MB-NG and EU DataTAG Projects Author 1: Name: Richard Hughes-Jones Affiliation: The University of Manchester Author2: Name: Stephen Dallison Affiliation: The University of Manchester Author3: Name: Gareth Fairey Affiliation: The University of Manchester Author4: Name: Yee Li Affiliation: UCL Author5: Name: Miguel Rio Affiliation: UCL Author6: Name: Robin Tasker Affiliation: Daresbury Lab CLRC Author is PC Member: No Main Fields: 6. Networks Abstract: This presentation reports on aspects of the work that has been carried out in two major projects consisting of more than 50 people. The MB-NG and EU DataTAG projects are designed to bring the possibility of high throughput data transfers over Gigabit and multi-gigabit links to the users. Today we have a core network with 10 Gbit/s capacity, but end applications rarely achieve more than 100 Mbit/s end-2-end. This is known as the ^Swizard gap^T as ways to change this situation are known but tend to reside within the network specialist community. These two projects pilot ways of achieving high speed transport, but also demonstrate the benefits in the context of real e-science applications. We describe work carried out over the MB-NG development network in the UK and the transatlantic testbed between Geneva and Chicago. The talk will cover details of the tests and demonstrations. The achievements include: ^U Continuous memory to memory data transfers with an average user data rate of 940 Mbit/s for over 24 hours using the HighSpeed TCP stack. ^U Sustained high throughput data transfers of 2 GByte files between RAID disk systems using Gridftp and bbcp. ^U Transfers of 2 GByte files using the http protocol from the standard apache Web server and HighSpeed TCP that achieved data rates of ~725 Mbit/s. ^U Comparison of the behaviour of different TCP stacks that have recently been proposed to overcome the inherent limitations of the old TCP protocol. The results indicate that sustained data flows at Gigabit rates are achievable, providing that ^SServer-quality^T PCs are used and the correct selection of parameters is made. We end with the progress of showing the benefit of this work for two important applications a) Particle Physics data transport b) the Reality Grid e-science project. Remarks: [None Given] -=-=-=-=-=-= End of abstract submission data =-=-=-=-=-=- IMPORTANT: To submit your paper you should revisit the submission site at http://cyberchair.nesc.ac.uk/AHM2003/, go to step 2 and at the appropriate places fill in the following: Login: R.Hughes-Jones@man.ac.uk Password: E00-2049642187 You will then be able to upload your paper. If you have questions about this message, please contact Anna Kenway (anna@nesc.ac.uk). --- End of this message --- ================== RFC 822 Headers ================== Return-Path: anna@nesc.ac.uk Received: from CURLEW (130.88.13.7) by a3.ph.man.ac.uk (V5.0A-1, OpenVMS V7.2-1 Alpha); Sun, 01 Jun 2003 19:30:41 +0000 Received: from [129.215.30.10] (helo=zappa.nesc.ed.ac.uk) by curlew.cs.man.ac.uk with esmtp (Exim 4.14) id 19MD7z-000JB1-65 for R.Hughes-Jones@man.ac.uk; Sat, 31 May 2003 21:38:59 +0100 Received: from page.nesc.ed.ac.uk (page [129.215.30.14]) by zappa.nesc.ed.ac.uk (8.12.8/8.12.9) with ESMTP id h4VKcCF7001470; Sat, 31 May 2003 21:38:12 +0100 (BST) Message-Id: <200305312038.h4VKcCF7001470@zappa.nesc.ed.ac.uk> From: AHM2003 - CyberChair To: R.Hughes-Jones@man.ac.uk Cc: r.perrott@qub.ac.uk, anna@nesc.ac.uk Subject: AHM2003 Abstract Submission Form Feedback Date: Sat May 31 21:38:12 2003 BST Reply-To: anna@nesc.ac.uk X-Mailer: Python smtplib X-Spam-Level: ** X-Scanned-By: MIMEDefang 2.29 (www . roaringpenguin . com / mimedefang) X-Scanner: exiscan for exim4 (http://duncanthrax.net/exiscan/) *19MD7z-000JB1-65*JWB7QWzv9yM*