Fall 2007

Spring 2007

Fall 2006

Homeostasis Routing (Aug 2007-Present)

• New intra-domain routing protocol that is load-adaptable & provably stable
• Use of several loop-free routes (multipath) even if they have unequal costs
• Latency based path selection, load responsiveness and limited update overheads
• Use of proactive congestion avoidance measures rather than reactive response
• TCP awareness built into the protocol so that load balancing schemes are not affected by TCP's congestion avoidance mechanism

Service Composition in Streaming Grid (Aug-Nov 2006)

• Distributed approach to dynamically compose services in a grid environment, as opposed to centralized algorithms that most existing systems use.
• Evaluation by running a multistage face detection application on Globus. Each stage can have multiple service instances. The challenge was to pick the best service instance that would minimize total cost of the pipeline
• Built a stand alone system to compare the new approach with existing schemes
• ~50% reduction in time taken to re-establish application pipeline after a real-time service switch.

Better Torrent (Aug-Nov 2006)

• Novel local cache scheme to improve the peer selection algorithm of BitTorrent P2P protocol and ensure faster convergence to best set of peers
• Use of historic information to decide upload rates to peers (incentive scheme).
• Minimized use of the centralized tracker which makes the system truly distributed
• 20% reduced time to download a 40MB file on prototype system

An IPSec based implementation of Virtual Private Networks (Jan-May 2004)        Report [ MS Word Format | PDF Format ]

• Implemented a hybrid protocol combining the best of the two existing IPSec protocols, ESP and AH. Authentication scheme of AH and confidentiality scheme of ESP were used.
• Used public key encryption, instead of symmetric key algorithms as suggested in IPSec. This was done in order to avoid the initial key exchange phase involved in the symmetric key algorithm
• Used network address translation (NAT) at the gateway to make the VPN layer transparent.

Online Voting System (May-Jul 2003)

• Designed & implemented an online voting system to conduct polls over the college intranet.
• Role based access control to polls and result data
• Major focus on secure communication of poll data between the database and the client.
• All communication encrypted using RSA. Authentication done using MD5 scheme

Network Chess Game (Jun-Jul 2002)

• Implemented a P2P network chess game for interactive play between multiple pairs of human players.
• Uses a chess server to pair up available players. Players communicate via the server in the beginning. After two players agree to play against each other, they communicate directly
• Includes move validation, support for special moves, a custom messaging protocol and an embedded chat interface
• Challenges here included incorporating event driven mechanism into C (using GTK) and getting the network communications seamless and effective

Basics of computer networks (Apr-May 2002)

• Implemented ftp, smtp clients as per the RFCs. Included some additional commands not available in existing clients. e.g. apploc, apprem for appending content to a local file or a remote file respectively
• Implemented POP3 client and server for retrieving mail from mail servers as per the RFC specifications

Office Automation Software (Dec 2001-Jan 2002)

• Built a small ERP application, including an inventory control system and workflow management system for the estate maintenance office, NIT, Trichy. Successfully deployed the same.
• ER modeling, relational table design , application and interface design

Goldman Sachs & Co. (Jun-2007 to August-2007)

• Interned in the firmwide technology division
• Implemented a database table management web application. This self-service tool was meant to replace a complex business process where users had to go through IT for even minor updates to their data in tables
• Main challenge here was to make the application flexible enough so that it can be plugged into any databasee and any application by just modifying configuration files. The structure of the database tables cannot be known before run time. The application needs to build data beans dynamically.
• Learnt a whole suite of web technologies (CSS, Javascript, JSP, Servlets, Struts framework, Ajax etc.) for building the application.

Oracle India Pvt. Ltd (May-2004 to Jul-2006)

• Part of the development team for Supply Chain Management module in Oracle Applications ERP suite
• Worked on a full development cycle, including functional design, technical design, implementation and unit testing for 2 projects
• Redesigned a bulk transaction processor to make it more scalable and robust. The processor was processing transactions online (one by one) when it actually could process them in batches. I had to understand the existing architecture & functionality to re-design the whole processor architecture and program flow to enable batch processing.
• Performance improvement of close to 30% for processing approximately 100,000 records
• Pioneered the fesibility study of taking up XML publisher as the new reporting tool for my team. My responsibility included understanding the tool and implementing a few reports using the same. I implemented two reports using the same and also assisted other team members in understanding the tool

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