I need here a standard that contains the equation to measure QoS parameters and metric. Parameters such as availability, response time, scalability etc.
You are not going to find a widely adopted equation that all cloud computing users and providers will consider the single formula for evaluating cloud. Different users will be looking for different qualities. You probably want to take a look at the ODCA document on Cloud Commercial frameworks (link below). It contains a long list of considerations for cloud buyers, and on page 32, it lists specific metrics to look out for. Also, the way that cloud applications are written today, most good cloud application developers don't care much about individual VMs - instead treating them as disposable.
http://www.opendatacenteralliance.org/docs/ODCA_Commercial_Framework_MasterUM_v1.0_Nov2012.pdf
You are not going to find a widely adopted equation that all cloud computing users and providers will consider the single formula for evaluating cloud. Different users will be looking for different qualities. You probably want to take a look at the ODCA document on Cloud Commercial frameworks (link below). It contains a long list of considerations for cloud buyers, and on page 32, it lists specific metrics to look out for. Also, the way that cloud applications are written today, most good cloud application developers don't care much about individual VMs - instead treating them as disposable.
http://www.opendatacenteralliance.org/docs/ODCA_Commercial_Framework_MasterUM_v1.0_Nov2012.pdf
the market of internet providers needs a standard regarding QoS but this is in the interest of the client so ... .Anyhow creating dedicated distributed applications to measure the real performances and create some relative scale seems to be a feasible solution
To measure QoS parameters such availability, response time, and scalability, it is practical to create a typical application scenario with analyitical model. Look at OPNET tools: www.opnet.com
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