Centralized Repository

• Central process acts as control hub
• Central data repository acts as information hub
• Termed client-server when based on standalone processes
• Integrability allows different clients and servers to interoperate
• Depending on persistency requirements:
  • A blackboard can store temporary data acting as a communications hub
  • A relational database can provide a persistent data store
• In a two-tier architecture the client accesses the database
• In a three-tier architecture a separate server offers task-oriented services
• A transaction monitor can be used to offer
  • Resiliency
  • Redundancy
  • Load distribution
  • Message sequencing
• Middleware allows different parts to communicate with each other
  • CORBA (OMG)
  • .NET (Microsoft)
  • RMI (Java/Sun)

Examples

• Window manager
• File server
• Print server
• Collaboration
  • WWW
  • Modern ERP systems
  • Instant messaging
  • Revision control (CVS)

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 Last change: Tuesday, November 25, 2003 1:40 am
 Unless otherwise expressly stated, all original material on this page created by Diomidis Spinellis is licensed under a Creative Commons Attribution-Share Alike 3.0 Greece License.