1. Internet2 Spring Member meeting
The DataTAG Project
Internet2 Spring Member meeting
8 April 2003,
Arlington, USA
Olivier H. Martin / CERN

2. DataTAG Mission TransAtlantic Grid
EU  US Grid network research
High Performance Transport protocols
Inter-domain QoS
Advance bandwidth reservation
EU  US Grid Interoperability
Sister project to EU DataGRID
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The DataTAG Project

3. Funding agencies
Cooperating Networks
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4. EU collaborators Brunel University CERN CLRC CNAF DANTE INFN INRIA
NIKHEF
PPARC
UvA
University of Manchester
University of Padova
University of Milano
University of Torino
UCL
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The DataTAG Project

5. US collaborators Northwestern University ANL UIC Caltech Fermilab
University of Chicago
University of Michigan
SLAC
Starlight
ANL
Caltech
Fermilab
FSU
Globus
Indiana
Wisconsin
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6. Project information Two years project started on 1/1/2002 3.9 MEUROs
extension until 1Q04 under consideration
3.9 MEUROs
50% Circuit cost, hardware
Manpower
WP1:
Establishment of a high performance intercontinental Grid testbed (CERN)
WP2:
High performance networking (PPARC)
WP3
Bulk data transfer validations and application performance monitoring (UvA)
WP4
Interoperability between Grid domains (INFN)
WP5 & WP6
Dissemination and project management (CERN)
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7. Interoperability Framework
EU Part
US Part
GriPhyN
PPDG
iVDGL
DataTAG-WP4
iVDGL
HICB
GLUE
DataGRID
Griphyn/PPDG
HEP experiments and LCG
LCG middleware
selection
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8. DataTag is a project funded by the European Union
The WorldGRID transatlantic
testbed
A successful example of Grid interoperability
across EU and US domains 
Flavia Donno (Former DataTAG WP4, LCG)
DataTag is a project funded by the European Union
CHEP 2003 – March – no. (1)

9. Solutions
Different Grid Architectures (VDT server/client vs. Computing Elements, Storage Elements, User Interfaces, Ressource Broker, Replica Catalog,…) UI
VDT Client RC IS RC SE RB IS
VDT Server CE

10. Final Architecture UI
VDT Client RC IS SE RB
VDT Server CE

11. DataTAG testbed status

12. Evolution of the testbed
2.5G circuit in operation since August 20, 2002
On request from the partners, the testbed evolved from a simple layer3 testbed into an extremely rich, most probably unique, multi-vendor layer2 & layer 3 testbed
Alcatel, Cisco, Juniper
Direct extensions to Amsterdam (UvA)/Surfnet (10G) & Lyon (INRIA)/VTHD (2.5G)
VPN layer 2 extension to INFN/CNAF over GEANT & GARR using Juniper’s MPLS
In order to guarantee exclusive access to the testbed a reservation application has been developed
Proved to be essential
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The DataTAG Project

13. Major 2.5/10 Gbps circuits between Europe & USA
DataTAG connectivity
NewYork IT
GARR-B
Abilene UK
SuperJANET4
3*2.5G
VPN Layer 2
STAR-LIGHT
ESNET
GEANT
CERN
2.5G --> 10G
10G
MREN NL
SURFnet
STAR-TAP FR
INRIA
ATRIUM/VTHD
Major 2.5/10 Gbps circuits between Europe & USA
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The DataTAG Project

14. Multi vendor layer 2/3 testbed
INFN (Bologna)
STARLIGHT (Chicago)
CERN (Geneva)
Abilene
Canarie
ESnet
INRIA (Lyon)
GEANT
Surfnet
2.5Gbps
10Gbps
10Gbps
Juniper
Juniper
Wave triangle
Extreme
Summit5i M M
Alcatel
2.5Gbps
Alcatel
GBE
GBE
Cisco
Cisco
M=A1670 (Layer 2over SDH Mux)
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15. Phase I (iGRID2002) Layer2
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16. Phase II Generic Layer 3 configuration (Oct. 2002 – Feb. 2003)
CERN
StarLight
Servers
Servers
GigE switch
GigE switch
2.5Gbps
C7606
C7606
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The DataTAG Project

17. Phase III Layer2/3 (March 2003)
INRIA
Layer 2
VTHD
Layer 1
Routers
Servers
GigE switch
A1670
Multiplexer
GigE switch
A7770
2.5G
2*GigE
C7606
To STARLIGHT
8*GigE
CERN
J-M10
C-ONS15454
10G
UvA
GEANT
From CERN
Servers
Ditto
Abilene
2.5G
GARR
ESNet
Canarie
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STARLIGHT
INFN/CNAF

18. Photos

19. Photos

20. Photos

21. Phase IV (September 2003?) CERN GEANT INRIA UvA GARR Layer 3 Layer 2
VTHD
Layer 1
Routers
Servers
10GigE switch
Multiplexer
GigE switch
A7770
10G
10GigE
C7606
To STARLIGHT
8*GigE
CERN
J-M10
C-ONS15454
10G
UvA
GEANT
From CERN
Servers
Ditto
Abilene
2.5G
GARR
ESNet
Canarie
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STARLIGHT
INFN/CNAF

22. Main achievements
GLUE Interoperability effort with DataGrid, iVDGL & Globus
GLUE testbed & demos
VOMS design and implementation in collaboration with DataGrid
VOMS evaluation within iVDGL underway
Integration of GLUE compliant components in DataGrid and VDT middleware
Internet landspeed records have been beaten one after the other by DataTAG project members and/or teams closely associated with DataTAG:
Atlas Canada lightpath experiment (iGRID2002)
New Internet2 landspeed record (I2 LSR) by Nikhef/Caltech team (SC2002)
Scalable TCP, HSTCP, GridDT & FAST experiments (DataTAG partners & Caltech)
Intel 10GigE tests between CERN (Geneva) and SLAC (Sunnyvale) – (Caltech, CERN, Los Alamos NL, SLAC)
2.38Gbps sustained rate, single TCP/IP flow, 1TB in one hour (S. Ravot/Caltech)
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23. 10GigE Data Transfer Trial
On Feb , a terabyte of data was transferred in 3700 seconds by S. Ravot of Caltech between the Level3 PoP in Sunnyvale near SLAC and CERN through the TeraGrid router at StarLight from memory to memory with a single TCP/IP stream. This achievement translates to an average rate of 2.38 Gbps (using large windows and 9kB “jumbo frames”). This beat the former record by a factor of ~2.5 and used the US-CERN link at 99% efficiency.
European Commission

24. Conclusions
TCP/IP performance issues in long distance high speed networks have been known for very many years.
What is new, however, is the widespread availability of 10Gbps A&R backbones as well as the emergence of 10GigE technology.
Thus, the awareness that the problem requires quick resolution has been growing rapidly during the last 2 years, hence the flurry of proposals.
HSTCP, Scalable TCP, FAST, Grid DT, XCP,…
Hard to predict which one will win, but simplicity and ease of deployment is definitely key to success!
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