this paper on cloud monitoring, you get idea from this paper

quality of experience framework for cloud computing (qoc)

Article Quality of Experience Framework for Cloud Computing (QoC)

Scalability depends on different levels as follows:

Server,

Plateform and

Network

Generally, an organization can make use of proactive and reactive scaling. In proactive scaling, the resources are scaled on fixed time-stamped intervals, assuming big traffic surges. Reactive scaling helps to scale up or down during unconditional traffic rise or fall. Obviously, if we have clear business idea and accurate traffic projection then it will help in right decision making and choosing the right cloud platform.

Hi Chetan,

we wrote a paper about self healing cloud architecture two years ago:

Article A System Architecture for Real-time Anomaly Detection in Lar...

There we suggested a decentralized monitoring and detection strategy. Just have a look if you're interested also in self healing clouds.

Regards

Thank You .. it will help me a lot