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High Throughput: Encouragement & Some Results

MB - NG. High Throughput: Encouragement & Some Results. Lots of people helped. Data over TCP Streams. Raid0 Disk. Raid0 Disk. GridFTP. GridFTP. EU Review Demo Consisted of:. Dante Monitoring. Site Monitoring. Node Monitoring. Throughput on the day !. TCP ACKs. Data ~400 Mbit/s.

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High Throughput: Encouragement & Some Results

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  1. MB - NG High Throughput: Encouragement & Some Results Lots of people helped GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  2. Data over TCP Streams Raid0 Disk Raid0 Disk GridFTP GridFTP EU Review Demo Consisted of: Dante Monitoring Site Monitoring Node Monitoring GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  3. Throughput on the day ! TCP ACKs Data ~400 Mbit/s GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  4. Some Measurements of Throughput CERN -SARA • Using the GÉANT Backup Link • 1 GByte file transfers • Blue Data • Red TCP ACKs • Standard TCP • Average Throughput 167 Mbit/s • Users see 5 - 50 Mbit/s! • High-Speed TCP • Average Throughput 345 Mbit/s • Scalable TCP • Average Throughput 340 Mbit/s GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  5. What the Users Really find: • CERN – RAL using production GÉANT • CMS Tests 8 streams • 50 Mbit/s @ 15 MB buffer • Firewall 100 Mbit/s • NNW – SJ4 Access • 1 Gbit link GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  6. MAN MCC OSM-1OC48-POS-SS Gigabit Ethernet 2.5 Gbit POS Access 2.5 Gbit POS core MPLS Admin. Domains SJ4 Dev SJ4 Dev SJ4 Dev PC PC SJ4 Dev MB - NG UCL OSM-1OC48-POS-SS 3ware RAID0 3ware RAID0 PC PC PC PC MB – NG SuperJANET4 Development Network (22 Mar 02) GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  7. MB - NG 24 Hours HighSpeed TCP mem-mem • TCP mem-mem lon2-man1 • Tx 64 Tx-abs 64 • Rx 64 Rx-abs 128 • 941.5 Mbit/s +- 0.5 Mbit/s GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  8. MB - NG Gridftp Throughput HighSpeedTCP • Int Coal 64 128 • Txqueuelen 2000 • TCP buffer 1 M byte(rtt*BW = 750kbytes) • Interface throughput • Acks received • Data moved • 520 Mbit/s • Same for B2B tests • So its not that simple! GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  9. MB - NG Gridftp Throughput + Web100 • Throughput Mbit/s: • See alternate 600/800 Mbitand zero • Cwnd smooth • No dup Ack / send stall /timeouts GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

  10. MB - NG http data transfers HighSpeed TCP • Apachie web server out of the box! • prototype client - curl http library • 1Mbyte TCP buffers • 2Gbyte file • Throughput 72 MBytes/s • Cwnd - some variation • No dup Ack / send stall /timeouts GridPP Meeting Oxford 2 July 03 R. Hughes-Jones Manchester

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