PPT-The Influence of Realism on Congestion in Network

Simulations K Mills joint work with C Dabrowski NIST December 1 2015 For more details see NIST Technical Note 1901 http wwwnistgovitlantduploadTechNote1901draft1pdf. and. Resource Allocation. Lecture material taken from. “Computer Networks . A Systems Approach. ”, Third . Edition,Peterson. and Davie,. Morgan Kaufmann, . 2007. .. Advanced Computer Networks. Congestion Control Outline. Cornell University. Srikanth Kandula. Albert Greenberg. Changhoon Kim. Microsoft Research. Seawall: Performance Isolation for Cloud Datacenter Networks. Cloud datacenters: Benefits and obstacles. Moving to the cloud has manageability, costs & elasticity benefits. Celio. Albuquerque, Brett J. Vickers, Tatsuya . Suda. 1. Outline. The Problem. Existing Solutions. Network Border Patrol. Feedback Control Algorithm. Rate Control Algorithm. Simulations and Testing. By. Bhavani manthena. What is Congestion?. Congestion . is a situation in Communication Networks in which too many packets are present in a part of the subnet, performance degrades. .. . Congestion in a network may occur when the load on the . Model representation and analysis. Presented by:. Ayushi Jain Rahul . Bobhate. Natasha Mandal . Ankur. . Sachdeva. Dung T. Nguyen, . Huiyuan. Zhang, . Soham. Das, My T. Thai, Thang N. . Dinh. Networking . Perspective:. Congestion and Scalability in . Many. -Core . Interconnects. George Nychis. ✝. , Chris . Fallin. ✝. , . Thomas . Moscibroda. ★. , . Onur. . Mutlu. ✝, . Srinivasan. Murari Sridharan. muraris@microsoft.com. CONEX BOF, IETF 76, Hiroshima. Its all about the apps . Apps have diverse needs. P2P, VoIP, TV, online apps, games. Filling the pipe while being TCP fair. High-speed congestion control, Autotuning the receive window, host OS (including app) bottlenecks. Networking . Perspective:. Congestion and Scalability in . Many. -Core . Interconnects. George Nychis. ✝. , Chris . Fallin. ✝. , . Thomas . Moscibroda. ★. , . Onur. . Mutlu. ✝, . Srinivasan. By. Bhavani manthena. What is Congestion?. Congestion . is a situation in Communication Networks in which too many packets are present in a part of the subnet, performance degrades. .. . Congestion in a network may occur when the load on the . Jian He. UT Austin. 1. Why is Congestion Control necessary?. Data . Packets. ACK. Congested . Link. Congested link vs. reliability: . long queuing delay, packet loss. But, can delay or packet loss always . Naturalism. 1860-1920ish. Realism (noun): the art of depicting nature as it is seen by toads. The charm suffusing a landscape painted by a mole, or a story written by a measuring-worm. . –– Ambrose Bierce, . udp. Congestion control. Congestion occurs when machines send too many packets to a network too quickly from the transport layer. . Performance will become degraded as packets are dropped and lost.. Congestion Control. If the transport entities on many machines send too many packets into the network too quickly, the network will become congested, with performance degraded as the packets are delayed and lost.. Summary. . July 28, 2012. What can we do?. Absent changes to the network can we actually do something?. Yes. Is there work in the area of measurements that can we do to create “incentives” to make updates in the network happen?.