Más contenido relacionado La actualidad más candente (20) 1. BREAKING THE DATA TRANSFER BOTTLENECK Yunhong GU [email_address] National Center for Data Mining University of Illinois at Chicago October 10, 2005 Updated on August 8, 2009 udt.sourceforge.net UDT: A High Performance Data Transport Protocol 3. >> INTRODUCTION PROTOCOL DESIGN & IMPLEMENTATION CONGESTION CONTROL PERFORMANCE EVALUATION COMPOSABLE UDT CONCLUSIONS 7. TCP Throughput (Mb/s) Throughput (Mb/s) Packet Loss Round Trip Time (ms) 0.01% 0.05% 0.1% 0.1% 0.5% 1000 800 600 400 200 1 10 100 200 400 1000 800 600 400 200 LAN US-EU US-ASIA US 10. A New Protocol Throughput (Mb/s) Throughput (Mb/s) Packet Loss Round Trip Time (ms) 0.01% 0.05% 0.1% 0.1% 0.5% 1000 800 600 400 200 1 10 100 200 400 1000 800 600 400 200 LAN US-EU US-ASIA US 14. >> PROTOCOL DESIGN & IMPLEMENTATION INTRODUCTION CONGESTION CONTROL PERFORMANCE EVALUATION COMPOSABLE UDT CONCLUSIONS 16. UDT Overview UDP Socket API Applications TCP Socket API Applications Applications UDT UDT Socket 18. Protocol Architecture UDP Channel Sender Sender Receiver Sender Receiver UDP Seq. No TS Payload ACK Seq. No NAK Loss List A B 19. Software Architecture CC API UDP Channel Sender Receiver Sender's Buffer Receiver's Buffer Sender's Loss List Receiver's Loss List Listener 22. >> CONGESTION CONTROL INTRODUCTION PROTOCOL DESIGN & IMPLEMENTATION PERFORMANCE EVALUATION COMPOSABLE UDT CONCLUSIONS 27. The Increase Formula: an Example Bandwidth ( B ) = 10 Gbps, Packet size = 1500 bytes 0.00067 <0.1 9999.9+ 0.001 (0.1, 1] [9999, 9999.9) 0.01 (1, 10] [9990, 9999) 0.1 (10, 100] [9900, 9990) 1 (100, 1000] [9000, 9900) 10 (1000, 10000] [0, 9000) Increment (pkts/SYN) B - x (Mbps) x (Mbps) 33. Efficiency, Fairness, & Stability Flow 1 Flow 2 Flow 3 Flow 4 0 100 200 300 400 500 600 700 Time (sec) 206.220.241.16 206.220.241.15 206.220.241.14 206.220.241.13 145.146.98.81 145.146.98.80 145.146.98.79 145.146.98.78 1Gb/s bandwidth, 106 ms RTT, StarLight, Chicago SARA, Amsterdam 34. Efficiency, Fairness, & Stability 0.04 0.02 0.04 0.16 0.08 0.11 0.11 Stability 1 1 0.999 0.998 0.999 0.999 1 Fairness 885 904 918 830 923 912 902 Efficiency 197 Flow 4 307 202 302 Flow 3 452 310 216 308 446 Flow 2 885 452 301 215 313 466 902 Flow 1 36. >> COMPOSABLE UDT INTRODUCTION PROTOCOL DESIGN & IMPLEMENTATION CONGESTION CONTROL PERFORMANCE EVALUATION CONCLUSIONS 41. Simplicity & Expressiveness CCC Base Congestion Control Class CTCP TCP NewReno CGTP Group Transport Protocol CUDPBlast Reliable UDP Blast CFAST FAST TCP CVegas TCP Vegas CScalable Scalable TCP CHS HighSpeed TCP CBiC BiC TCP CWestwood TCP Westwood 28 73 / +132-6 11 / +192-29 8 / +27-1 11 / +192-29 27 / +145-2 37 / +351-2
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