from the literature, I saw that availability, response time and throughput are the most important QoS parameters for cloud computing I need other QoS which also important in cloud computing system.
I am not familiar with the Cloud Computing system, but in my opinion, achievable throughput and end-to-end delay is the most two fundamental QoS parameters for all communication systems. Other QoS parameters include packet loss, outage, security, etc..
It is a lot of parameters, one can't be chosen. Detailed:
Wen, P. X., & Dong, L. (2013, September). Quality Model for Evaluating SaaS Service. In Emerging Intelligent Data and Web Technologies (EIDWT), 2013 Fourth International Conference on (pp. 83-87). IEEE.