LSSA 10 - Process and Deployment Design

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LSSA 10 - Process and Deployment Design
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Five Views

• Physical database
• Process
• Process state
• Deployment
• Canonical server

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Physical Database

• How is the data stored in different databases?
• Oracle, DB2
• ISAM
• Flat files, XML
• Custom

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Physical Database

• Size
• Growth rate
• Transaction rates
• Archive policies
• Kinds of queries

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Process view

• Problems with multiple processes
• Order of process startup and shutdown
• Process failure and recovery
• Allocation of components to processes
• Load balancing
• Process intercommunication
• Shared resources

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Process View
Web server
Web browser
Info server
Teller server
Teller client
Database server
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Process State

• Describe the states, the state transitions, and
  the interactions between processes
• Can model the states of a process or of its
  components
• Used to avoid deadlock and starvation and to
  prevent interference between processes

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Process State
Init Success
Initializing
Operating
Diag OK
Init Failure / SendAlarm(InitFailure)
System Error or Shutdown Request
Diagnosing Startup ENTRY/SendAlarm(Diag)
Diag Failure / SendAlarm(StartFailure)
Shutting down
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Deployment View

• Shows the nodes that processes and components are
  run on

DB server
Web server
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Canonical Server(Scalable Server)

• Scalable system must duplicate servers
• Canonical server shows the design of a server
  that can be duplicated
• Replication is hard
• Most often purchased as a component (Oracle, MTS)
  or a standard design (web server)

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Summary

• Many possible views
• Can express most of them in UML
• Often not needed
• You need to know a lot more than just UML to
  understand these views