1. 04/03/05Varsha Apte, R&D@CSE, 03/02-03/051 Research, Development and Teaching @CSE Dept. IIT Bombay Work done, work in progress, and future work March 2002-March 2005 Varsha Apte Associate Professor (Contract), CSE Dept. IIT Bombay March 4th, 2005

2. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 2 Research and Development Two threads of work: Performance Engineering of Software and Distributed Systems Stochastic models (Markov models, queuing models) applied to multi-tier server systems, modeling tools, measurement analysis tools, overload control. Computer Networks (Performance) Wireless LAN performance analysis, admission control, Linux TCP/IP stack performance, SMS capacity analysis, location determination.

3. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 3 Software Performance- Research Work Done Overload Control Mechanism for Web- Servers (M.Tech.+Ph.D) Presented at IISW-04 (held with RTSS’04), Lisbon Portugal. (Co-authors: V. Mathur, N. Singmar, Prof. D. Manjunath) Paper invited for submission to special issue of International Journal on Critical Infrastructures Complexity Aware Queuing Models of Software Servers (Ph.D) In Proceedings of MASCOTS’ 04, Volendam, The Netherlands (Co-author: V. Mathur)

4. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 4 Software Performance – Tool Development (Ongoing) “CAPE Tool” (Computer Aided Performance Engineering) Tool that takes high-level software and hardware specification, generates queuing network model, and produces performance measures Sponsored by MHRD “AutoProf” (Automated Profiler) Tool that co-ordinates and automates the resource usage profiling of distributed server systems Sponsored by Intel, USA. (Joint project with Prof. Bellur) (Total Outlay: Rs. 23 Lakhs approx.)

5. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 5 Software Performance – Future Research Directions Overload control Analytical model, more sophisticated yet practically usable techniques. Generalize to admission control and Software QoS Distributed systems performance modeling Further enhancements in analysis tool (CAPE) “Design” tool – budgeting, deployment, configuration Applications to autonomic computing, self-configuration Measurement tools Further develop “AutoProf” – automated capacity analysis tool

6. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 6 Network Performance – Work Done Capacity Analysis of GSM Short Message Service (B.Tech.) In Proceedings of the National Conference of Communications, Bangalore, 2004.

7. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 7 Network Performance - Ongoing Wireless LAN (IEEE 802.11b) sizing model Partly sponsored by Tata Infotech Admission control in IEEE 802.11e networks Integrated mechanism for voice+data flows TCP/IP Stack performance on multiple processors, and benefits of offloading Sponsored by UNM Systems Inc., USA Location determination system based on WLANs Demonstrated system working in KreSIT WLANs (Total outlay of sponsored research: Rs. 2.2 Lakhs)

8. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 8 Network Performance – Future Research Directions Wireless LAN: Admission control & scheduling for QoS

9. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 9 Teaching- (Guiding Research) Ph. D. Joining YearResearch FocusR&D Output July 2003Software Performance Models, overload control, Admission control to software hosting centers for QoS MASCOTS 2004 paper, IISW’04 paper, journal submission in preparation January 2003Wireless LANs (Sizing, Admission Control,…) Paper on sizing tool in preparation Two students, currently working towards their Ph. D.

10. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 10 Teaching- (Guiding R&D) M. Tech. Projects Academic YearProjectR&D Output 2003-2004Overload Control of Web Servers (Co-guide: Prof. D. Manjunath)IISW’04 paper 2002-2003Hardware implementation of the DWRR scheduling policy (Main guide: Prof. SSSP Rao) Students Graduated: 1 (+1 as co-guide) Current Students: 7 (to graduate in July 2005) Academic YearProjectR&D Output 2004-2005Simulation tool for Performance Analysis of Distributed Systems (MHRD)Working Tool Analytical tool for Performance Analysis of Distributed Systems* (MHRD)Working Tool Automated Server Profiling Tool (Intel)Working Tool Location Determination System using Wireless Access PointsWorking Tool Linux TCP/IP Stack performance (UNM Systems) Admission Control in Wireless LANs (Co-guide: Prof. S. Iyer) Analytical Models of Delay in Wireless Ad-Hoc Networks

11. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 11 Teaching- (Guiding R&D) B. Tech. Projects Academic YearProjectR&D Output 2002-2003Performance of Security Protocols Automated Capacity Analysis Tool GSM SMS Capacity AnalysisNCC 2004 paper 2003-2004CDMA Admission Control/Scheduling Software QoS at Shared Hosting Centers 2004-2005Performance Packet Scheduling Disciplines BTPs: 5 Graduated, 1 current DDMPs: 2 Academic YearProjectR&D Output 2003-2004Optimal Design of Data Centers TCP Performance on Wireless LANs

12. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 12 Teaching (Courses) Formulated and taught (3 semesters so far) PG course on “Performance Analysis of Computer Systems and Networks” Stochastic models such as Markov chains, queues and queuing networks, applied to systems and networks. Core UG course in “Computer Networks” (3 semesters so far) Re-designed to follow Top-Down approach (Kurose-Ross)

13. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 13 Teaching - CEP Three on-site workshops on Performance Analysis given to Wipro Technologies (Bangalore, Hyderabad), in the last two years.

14. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 14 Service – Lab Development Major re-vamp of “Computer Networks Lab”, as Lab-In-Charge (since Jan 2003). Partly funded by sponsored projects (see previous slides) Lab is now well-equipped - Wireless LAN, high- speed LAN, desktops, laptops, servers (including dual-processor), printers, Web-cams, furniture, books.

15. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 15 Service – Web/Report Committee Major improvements to the department Web- site, first as member, then convener. Currently supervising: A team of 4 TAs for Web-site development and maintenance A team of 2 TAs for Report-tool development A team of 4 TAs for Office-automation development (jointly with Prof. Sivakumar)

16. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 16 Service – DPGC Member (since July 2004), Department Post- Graduate Committee. Help in resolving PG issues.

17. 04/03/05 Varsha Apte, R&D@CSE, 03/02-03/05 17 Future Teaching/Service Ideas Offer undergraduate elective in performance analysis Establish Departmental “UG Networking Lab” Offer more CEP/DEP courses Develop Web-based courses (C-DEEP) Continue service to department, institute in various roles