Distributed Models

A physical model considers: underlying hardware elements

An architectural model considers:

• Architectural elements - components of the system that interact with each other.

• Architectural paterns

• Associated middleware solutions

Fundemental models define: The non functional aspects such as:

• Reliability

• Security

• Performance

Variations of interaction models

Two simple models of distributed system interaction are:

• Synchronous system model - assumes known bounds on:

  • The time to execute

  • Message transmission delay

  • Local clock drift rate

• Asynchronous system model - assumes no bound on:

  • Process execution speed

  • Message transmission delays

  • Clock drift rates