Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Performance Parameters: arrival rate of events,

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Presentation transcript:

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Performance Parameters: arrival rate of events, chosen queuing discipline, chosen scheduling algorithm, service time of events, network technology, network bandwidth, chosen routing algorithm

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Performance Example: analyzing performance of MVC (Model-View-Controller) architecture

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Performance Example: analyzing performance of MVC (Model-View-Controller) architecture

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Performance Example: analyzing performance of MVC (Model-View-Controller) architecture Items need to be known or estimated: The frequency of arrivals from outside the system The queuing discipline used at the view queue The time to process a message by the view The number and size of messages that the view sends to the controller The bandwidth of the network that connects the view and the controller The queuing discipline of the controller The time to process a message within the controller The number and size of messages that the controller sends back to the view The bandwidth of the network used for messages from the controller to the view The number and size of messages that the controller sends to the model The queuing discipline used by the model The time to process a message within the model The number and size of messages that the model sends to the view The bandwidth of the network connecting the model and view

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Availability Steady-state availability model to indicate the uptime of a system over sufficiently long duration. MTBF/(MTBF + MTTR) MTBF: the Mean Time Between Failure (derived based on the expected value of the implementation’s failure probability density function (PDF)). MTTR: the Mean Time To Repair

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis Analyzing Availability

Quality Attribute Modeling and Analysis Modeling Architecture to Enable Quality Attribute Analysis

Quality Attribute Modeling and Analysis Thought experiment: informal discussions that developers and architects have on a daily basis about qualities of components under certain contexts. Back-of-the-envelope: rough analysis based on the best data available, based on past experiences, or even based on the guesses of the architects, without too much concern for precision.