DISRET: A Distributed System To Support a Retailchain

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DISRET A Distributed System To Support a
Retail-chain
CS775 PROJECT
Project Group Srikanth Balusani Rajendra
Shirhatti Bhakta Ram
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Features of DISRET

• Availability
• -System will work at least with one accessible
  server.
• -All Servers in the System will be provided with
  a
• backup server.
• Dynamic System
• - System provides for Dynamic Allocation of
  Resources - Addition/Deletion/Transfer of
• Zone, Regional, Retail Servers.
• Response Time
• - System is designed to provide lowest
• response Time

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DISRET Architecture
National
Regional
Zonal
Retail
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Implementation Issues

• Communication
• - Remote Method Invocation
• Language
• - Java
• The modules in the project
• Client
• - Client at each level of Hierarchy
• Server
• - Server to serve the Client at Each Level of
  Hierarchy
• Active Resources List
• -Implemented Using XML

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DISRET Implementation
Local Update
Client
Server
Resource List Lookup
Other Servers
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Active Resources List
ltnational ncount"1" regc"2" host"stimpy"
port"5606"gt ltREGIONAL host"ren" port"3456"
rid"1" zonc"1"gt ltZONAL host"dilbert"
port"5687" zid"1" locc"1"gt ltLOCAL
host"stimpy" port"343" lid"1" /gt
lt/ZONALgt lt/REGIONALgt ltREGIONAL
host"ewd" port"3223" rid"2" zonc"0"
/gt lt/nationalgt
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Design Issues Unresolved
Check for Server - Periodic ping of Servers
by Server under its Hierarchy -
Removal of Resource from Active Resources List if
ping fails Election Algorithm -
Implementation of National Server as one of the
Regional Servers. - If Regional Server
acting as National Fails, implement a
Election Algorithm among Regional Servers to
find successor. Server to keep track of Requests
from Clients - A Queue Processing Server to
keep track of requests from Client, so that
requests can be processed in FIFO or Round
Robin.
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Questions?END OF PRESENTATION