GGF 5 and GGF 6

1. GGF 5 and GGF 6 Richard Hughes-Jones The University of Manchester DataGrid WP7 Oct 2002 R. Hughes-Jones Manchester

2. GGF 5 • Network Monitoring Working Group • One working slot: • Discussion of Network Measurements document draft • Network Characteristics hierarchy • Measurement Methodologies and Tools lists • Tools document • Revisions to milestones • One speakers slot: • Henk Uijterwaal: RIPE Test Traffic Measurements project • Warren Matthews: IEPM-BW measurements and plans for MAGGIE • Richard for Tiziana : Closeness metrics • Rich Wolski: What do Short TCP Bandwidth Probes Tell Us? DataGrid WP7 Oct 2002 R. Hughes-Jones Manchester

3. Network Measurements Working Group • Details: Hierarchy Document/Future Plans (60) Presentations on Recent Work (50) • Chairs: Bruce Lowekamp, College of William and Mary Brian Tierney, LBL Richard Hughes-Jones, University of Machester • Purpose • Hierarchy document: Reviewed Network Characteristics Hierarchy, discussion focused on issues of QoS, Available Bandwidth, and Topology. Upcoming documents were revised and milestones adjusted accordingly. • Presentations: 5 Presentations were given on current network measurement systems and issues. • Plans • Hierarchy document will be completed and reviewed at GGF6, submission to GFSG is expected at that time. • Survey of tools, and classifications of existing tools to characteristics is beginning, preliminary results and document expected for GGF6. DataGrid WP7 Oct 2002 R. Hughes-Jones Manchester

4. Network Research Group • 10 things net people might wish grid people knew.... • At the receiver record • Congestion Control - Slow Start is this always necessary? no ! • Routing – let the Network people do it ! • Packet Sizes Go faster LANs have always pushed the MTU up • Overlays and P2p • QoS - Would be nice (contrariwise: see Congestion Control) • Multicast Tier 1 routing works. Most ISPs run core native multicast • Layer 2 Considerations - layer 2 NBMA nets - lots - a pain • Light v. Heavyweight Protocols Header prediction, Packet templates make stacks simpler • Macroscopic Traffic and System Considerations Self similarity, so? traffic is self similar (i.e. arrivals are not i.i.d) - this doesn't actually matter much. • 10 things grid people wish networking people knew • Help needed from Grid people !!! DataGrid WP7 Oct 2002 R. Hughes-Jones Manchester

5. GGF 6 • Network Monitoring Working Group • Session 1: Network Measurements Characteristics • Tuesday, October 15, 10AM, Gleacher Rm 400 • Discussion of the Characteristics Document (to be linked in by Oct 4) is the primary task for this session. • Participants are asked to read the document in advance and be ready to discuss the proposed terminology, described characteristics, and what needs to be added or changed to make this a useful document. We are hoping that this document can be submitted to the GFSG before GGF7. • Discussion of the next projects: tools survey, and relationships document, link to DAMED WG for publishing data • Session 2: Network Measurements Hierarchy and • Thursday, October 17, 8AM, Sheraton - Mississippi • Wrapup of change or discussions on Characteristics document. • Planning for tools survey • Planning for relationships document DataGrid WP7 Oct 2002 R. Hughes-Jones Manchester