1. Grid Network Performance Monitoring for e-Science

2. Contents Purpose of the work GridMon: what it does & how it does it Progress & examples The future Conclusion Questions?

3. Purpose of the work “…design and deploy an infrastructure for network performance monitoring within the UK e-Science community.” Fault finding Performance prediction Key aspects: Publish results  (adaptive) Grid middleware and Grid apps Visualisation for humans End-to-end ability of TCP wrt high b/w networks

4. Monitoring: What?

5. Monitoring: How(1)? www.visualisation Monitor Node Grid middleware Monitoring Architecture IperfER PingER UDPmon MiperfER bbcp/ftp Tools installed on dedicated & similar node at each centre MESH Publication service 30 mins

6. Monitoring: How(2)?

7. Progress Intitial toolkit (IperfER, PingER, UDPmon) at 11 of 12 e-Science centres. Other useful UK sites being added. MiperfER on beta trial at Cambridge, Cardiff, MCC and Newcastle. Active map also on trial. Click for AMAZING live demo

8. Examples: PingER

9. Examples: IperfER(1)

11. Examples: IperfER(2)

12. Examples: MiperfER

13. Examples: bbcp & bbftp

14. The Future Longer term: More sites…but mesh doesn’t scale! Wishlist features (but perhaps not all 3,000,000) Investigate other issues: window sizes, QoS… And… bbcp/ftp GridFTP Web service Tools www i/f (Tasker’s) Trident

15. TCP Best Practice Demo TCP best practice to users – “this is what you can achieve, if you ‘tune’ your machine like this...” Possibles “variables”: – Kernel versions and patches – MTU – Interrupt handling However: – “...performance from copper-based GigE cards are intimately connected with judicious use and understanding of the corresponding driver(s)...” Gray and Betz – Bus speed, bus width… No new fangled gizmos – using what we already have!

16. Conclusion Near national infrastructure A little basic, but improving Poised for web i/f into historic data …. then web i/f tests on demand What do YOU do next?......... – http://gridmon.dl.ac.uk/ http://gridmon.dl.ac.uk/