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Projects

• Distalyzer
  Distalyzer is an automated tool to support developer investigation of performance issues in distributed systems. We aim to leverage the vast log data available from large scale systems, while reducing the level of knowledge required for a developer to use our tool. Specifically, given two sets of logs, one with good and one with bad performance, Distalyzer uses machine learning techniques to compare system behaviors extracted from the logs and automatically infer the strongest associations between system components and performance.
• PerfDetect
  PerfDetect is a framework for automatically detecting performance changes in software repositories, during nightly benchmarks.
• DC2 - Data center Distributed Communication
  DC2 is an overlay communication mechanism targeted toward data center networks. DC2 leverages the underlying network topology at the overlay layer to obtain high efficiency group communication operations.
• Mace
  I have contributed to MacePC -- an automated performance modelchecker, and also many libraries in Mace, all in C++.

Refereed Conference Publications

• Karthik Nagaraj, Charles Killian, Jennifer Neville.

  Structured Comparative Analysis of Systems Logs to Diagnose Performance Problems

  at 9th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2012). San Jose, CA. 25-27 April, 2012. PDF Distalyzer Code Talk: PPTX PDF
  
  
• Karthik Nagaraj, Hitesh Khandelwal, Charles Killian and Ramana Kompella.

  Hierarchy-Aware Distributed Overlays in Data Centers using DC2

  at 4th International Conference on Communication Systems and Networks (COMSNETS 2012). Bangalore, India. 5-7 January, 2012. PDF Slides
  
  
• Charles Killian, Karthik Nagaraj, Salman Pervez, Ryan Braud, James W. Anderson and Ranjit Jhala.

  Finding Latent Performance Bugs in Systems Implementations

  at 18th International Symposium on the Foundations of Software Engineering (FSE 2010). Santa Fe, NM. 7-11 November, 2010. PDF ACM Portal
  
  
• KC Sivaramakrishnan, Karthik Nagaraj, Lukasz Ziarek and Patrick Eugster.

  Efficient Session Type Guided Distributed Interaction

  at 12th International Conference on Coordination Models and Languages (COORDINATION 2010). Amsterdam, Netherlands. 7-10 June, 2010. PDF Springer
  
  

Journal Publications

• KC Sivaramakrishnan, Mohammad Qudeisat, Lukasz Ziarek, Karthik Nagaraj and Patrick Eugster.

  Efficient Sessions

  Science of Computer Programming. 2012 ScienceDirect
  
  

Technical Reports

• Karthik Nagaraj, Charles Killian, Jennifer Neville. Structured Comparative Analysis of Systems Logs to Diagnose Performance Problems. TR-11-020.
  
• Karthik Nagaraj, Hitesh Khandelwal, Charles Killian and Ramana Rao Kompella. Revisiting Overlay Multicasting for the Cloud. TR-10-011.
  

Posters

• Karthik Nagaraj, Charles Killian, Jennifer Neville. Tracking Behavioral Changes in Distributed Systems using Distalyzer at 23rd ACM Symposium on Operating Systems Principles (SOSP 2011). Cascais, Portugal. 23-26 October, 2011. (Shepherded) Summary Poster
  
  
• Karthik Nagaraj, Charles Killian, Jennifer Neville. Structured Comparative Analysis of Systems Logs using Distalyzer at 8th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2011). Boston, MA. 30 March - April 1, 2011. PDF
  
  
• Karthik Nagaraj, Hitesh Khandelwal, Charles Killian and Ramana Kompella. DC2: Scalable Distributed Communication Middleware for the Cloud at 7th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2010). San Jose, CA. 28-30 April, 2010. PDF
  
  
• Karthik Nagaraj, Ramana Rao Kompella, Charles Killian. Distributed Social Networking at 6th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2009). Boston, MA. 22-24 April, 2009. PDF
  
  

Program Committees

• HPDC 2012 - External reviewer.

Courses

Teaching