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General description:

LINE is a tool for the performance analysis of cloud applications. LINE has been designed to automatically build and solve LQN performance models. LINE is able to provide accurate estimates of relevant performance measures such as application response time or server utilisation. LINE can therefore be used at design time to diagnose whether the deployment characteristics are adequate to attain the desired QoS levels.Although other tools are available for performance modelling, LINE stands apart for a number of reasons. First, in addition to provide average performance measures, LINE has been designed to compute response time distributions, which can be directly used to assess percentile Service Level Agreements (SLAs). Second, a number of features in LINE aim at describing the specificities of cloud applications. These include random environments that appropriately model reliability and multi-tenancy; and general service times, which can represent the resource demands posed by the very broad range of cloud applications. Finally, LINE can also compute transient performance measures, capturing the effect of temporary conditions, such as workload spikes or failures of the application components.


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