Current DBMS Based Activities at NCST, Juhu Sandhya Desai National Centre for Software Technology Juhu, Mumbai.

Current DBMS Based Activities at NCST, Juhu

Sandhya DesaiNational Centre for Software Technology

Juhu, Mumbai

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Objective

Introduce the nature of activities at the centre

Share our experience in developing applications

Get new ideas and better solutions Possibilities for future Collaborations

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Present group members at NCST, Juhu

Urjaswala Vora Gauri Rendalkar Lakshana Pant Amarish Choubal Vishal Mehrotra Satish Rane Sudhin Deshpande Sandhya Desai

Salim Sayyed Amit Vaidya

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Projects Under progress

Computerization of Mumbai University Exam centre.

MTNL Directory Service. TIFR Payroll. Supporting NCST office functions. Advanced PGDST DBMS module Database design review for TEC

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Research Interests

Data Warehousing System Architecture Internet and databases Workflow systems

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MTNL- Web dictionary Service

Started as prototype for Mumbai node Dictionary services Delivered operational system at Both Delhi and Mumbai URL: mumbaihelp1.mtnl.net.in URL: delhihelp1.mtnl.net.in

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System Configuration

Oracle 8 on Unix server Java application server on Windows NT Web browsers on clients

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Application Server

Coded in Java Manages pool of connections to Oracle Uses threads to serve each request parses client requests and formulates

equivalent SQL query Formats result set creating dynamic HTML

pages

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Issues

Performance security Usage log 50hits/min, 20,000 hits on first day extensions to the dictionary service

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Mumbai University project

SRS document proposed duration one year team of 6 members

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System Profile

Complex requirements of exam centre around 1,50,000 students every year around 600 exams with time varying structure,

revised exams around 15,000 examiners around 10,000 papers and, revised papers around 150 colleges around 150 degrees, diplomas, certificates

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Customer Profile

Distributed No centralized authority Not very demanding Not too committed to project Overloaded with operations

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System Configuration

SQLserver Powerbuilder for client software Power Designer Windows NT server

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Design Issues

Analysis of exam patterns Complexities in exam schemas Difficult to get complete domain knowledge Work flow understanding Tracking the actions Reengineering

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What we learnt?

Trivial things are not at all trivial– report formats– identifiers– data entry forms and formats– collation of data – verifying the data– checking consistency of data

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At Cross Roads

Software engineering Quality Assurance Project management

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Retrospection

Transaction processing and performance Selection of Software selection of hardware platforms and

networking Bottlenecks in the system

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Success of the System

User involvement User feedback User training Constant support after implementation Extensions to the system

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What is lacking?

Documentation Vigorous testing and inspection Process engineering Serious analysis of applications and

improvement in the data design Online help feature Security issues

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Summary

Limitations of NCST kind of organization in handling and maintaining application software

Project management- one time vs often done activity

Process engineering team spirit

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Client infrastructure

Proper support– staff– resources– work culture

Able to make the system operational Staff should bale to cope up with new

technology Long term planning

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Issues.

Web for accessing the application 3 layer architecture Security with Web technology performance after fully operational Component technology