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G enerally S uccessful o wing-to C ommunication: ns-3 Experiences with GSoC

Craig Dowell University of Washington Google SoC Infosession March 5, 2009. G enerally S uccessful o wing-to C ommunication: ns-3 Experiences with GSoC. Outline. A quick overview of ns-3 Our Experiences with GSoC Our Process Lessons Learned. What is ns-3?.

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G enerally S uccessful o wing-to C ommunication: ns-3 Experiences with GSoC

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  1. Craig Dowell University of Washington Google SoC Infosession March 5, 2009 Generally Successful owing-to Communication:ns-3 Experiences with GSoC GSoC March 2009

  2. GSoC March 2009 Outline • A quick overview of ns-3 • Our Experiences with GSoC • Our Process • Lessons Learned

  3. GSoC March 2009 What is ns-3? • Open-Source Discrete-Event Network Simulator • Allows Simulation of Internet Systems • Integration with Testbeds and Virtual Machines

  4. GSoC March 2009 What is ns-3? A Simulated ns-3 Node is a bare computer to which simulated applications, stacks, and NICs are added Application Application Application

  5. GSoC March 2009 What is ns-3? Ns-3 Simulates Complex Network Topologies in Software

  6. GSoC March 2009 virtual machine virtual machine What is ns-3? Ns-3 Connects “Real” Software Through Simulated Networks real machine ns-3

  7. GSoC March 2009 Example: Emulab University of Utah Emulab Testbed

  8. GSoC March 2009 What is ns-3? Ns-3 Connects Simulated Protocol Stacks Through Real Networks ns-3 ns-3 real machine real machine Testbed

  9. GSoC March 2009 Example: ORBIT Rutgers WINLAB ORBIT Radio Grid

  10. GSoC March 2009 The ns-3 GSoC Process • Limited Number of Slots • More Applicants than Slots (>10:1) • We have suggestions, and accept new ideas • Rank Initial Application • People who knew ns-3 basics ranked higher; • People who had clearly thought about the problem ranked higher; • Don’t just parrot the idea back; • Show us quickly why you are “the one.”

  11. GSoC March 2009 The ns-3 GSoC Process • IRC “Interviews” • Probe knowledge of C++, networking, past projects • Chat about proposed project • Have you thought about the project at any level of detail? • Do you have a reasonable scope of work in mind? • Do you have a reasonable approach? • How serious are you about this work? • Does this work really interest you? • Agreement on Scope and Schedule • Chat Chat Chat! Communicate Communicate Communicate! Code code code.

  12. GSoC March 2009 Lessons Learned • Students had a problem creating and adhering to a schedule! • Students need to understand this is a real full-time job • You have to interview; • You have to get hired; • You have to work full time; • You have to produce something; • You have to produce it on time; • You have to make something that does what you said it would; • You have to communicate with the rest of your team.

  13. GSoC March 2009 Lessons Learned • Communication is absolutely critical. • Direct correlation between levels of communication and success • The students that spent the most time on IRC with us had the best outcomes. • We will heavily use IRC, Skype, etc. • Need at least weekly coordination chats with mentors • Daily chats if difficulties arise. • Time is tight (10 weeks) so adherence to a real schedule is critical.

  14. GSoC March 2009 Lessons Learned • If a GSoc project is taken lightly it is a waste of time for everyone involved. • With reasonable effort • Students can do very good work. • Students can make important contributions to the project • Everybody can benefit • Everybody can learn

  15. GSoC March 2009 ns-3 and GSoC Short Q & A

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