PPT-Fixing TCP in Datacenters

Costin Raiciu Advanced Topics in Distributed Systems 2011 TCP Primer Loss recovery Fast retransmit Timeouts Congestion Control Buffer sizing TCP Incast Why does it happen How bad is it. (. AccECN. ). draft-kuehlewind-tcpm-accurate-ecn-03. Bob Briscoe, BT. Richard Scheffenegger, NetApp. Mirja . Kühlewind. , Stuttgart . Uni. IETF-90, Jul’14. Bob Briscoe’s work is part-funded by the European Community. eSAS. ). and benchmarking . eSAS. prototype against legacy SAS. UCCS. Master’s Project Proposal. Deepti Reddy. 1. Typical SAS Topology. X. X. X. X. - . DISK DRIVES. - . EXPANDERS. MPT Driver. SAS CONTROLLER. Slide . 1. Google Datacenter. CS 142 Lecture Notes: Datacenters. Slide . 2. Datacenter Organization. Rack:. 50 machines. DRAM: . 800-3200GB . @ 300 . µs. Disk: 100TB @ 10ms. Single server:. 8-24 . cores. Network Fundamentals. Lecture 14: Datacenter Networks. “The Network is the Computer”. Network computing has been around forever. Grid computing. High-performance computing. Clusters (Beowulf). Highly specialized. Based on: A look back at “Security Problems in the TCP/IP Protocol Suite” by Steven M. . Bellovin. , AT&T Labs-Research. Presented by :Moinul I . Zaber. ,. Kent State University. What’s on Today!. draft-handley-mptcp-routing-00. Mark Handley. Costin Raiciu. Marcelo Bagnulo. Multiaddressed MP-TCP. Host is connected to the Internet via more than one path.. Site where host resides is multihomed.. HINGES 97 DOWEL FIXING DOWEL FIXING Negative 25oSCREW FIXING R51MK850525C00 24o to 30o CornerSCREW FIXING R51MS850530C00 DOWEL FIXING 110 DOWEL FIXING 110 DOWEL FIXING 110 DOWEL FIXING DOWEL FIXING S Computer Networks. Principles of Congestion Control. Congestion:. informally: “too many sources sending too much data too fast for the . network. to handle”. different from flow control!. manifestations:. Sylvia Ratnasamy. http://inst.eecs.berkeley.edu/~ee122. /. Material thanks to Ion . Stoica. , Scott . Shenker. , Jennifer Rexford, Nick . McKeown. , and many other colleagues. 2. TCP Header. Source port. (Congestion Window Control). Ashkan Paya . 1. Based on. An argument for increasing TCP’s initial congestion window. Nandita Dukkipati, Tiziana Refice, Yuchung Cheng, Jerry Chu, Tom Herbert, Amit Agarwal, Arvind Jain and Natalia Sutin. Google Inc.. Control. . (part II). EE 122, Fall 2013. Sylvia Ratnasamy. http://inst.eecs.berkeley.edu/~ee122. /. Material thanks to Ion . Stoica. , Scott . Shenker. , Jennifer Rexford, Nick . McKeown. , and many other colleagues. Yu Pei. , Yi Wei, Carlo Furia, Martin Nordio, Bertrand Meyer. Chair of Software Engineering, ETH Zürich . Program . Fixing. Program fixing. Find a fault. Analyze the fault. Where. What. Fix the fault. Levasseur. 12/10/2013. Outline. Introduction. CUBIC. CUBIC in Linux. ns-3 Implementation. Results. Conclusions. 12/10/2013. 2. Introduction. TCP grows . cwnd. too slowly for large bandwidth connections. Yingfei. . Xiong. Ph.D. Student . Advisor. : Zhenjiang Hu and Masato Takeichi. University of Tokyo. 1. Contents(45mins). Introduction. Running example C1 (try to find a better one). Beanbag. The Beanbag Language.