  Cloud computing today has now been growing as new technologies and new
business models. In distributed technology perspective, cloud computing most
like client-server services like web-based or web-service but it used virtual
resources to execute. Currently, cloud computing relies on the use of an
elastic virtual machine and the use of network for data exchange. We conduct an
experimental setup to measure the quality of service received by cloud
computing customers. Experimental setup done by creating a HTTP service that
runs in the cloud computing infrastructure. We interest to know about the
impact of increasing the number of users on the average quality received by
users. The qualities received by user measured within two parameters consist of
average response times and the number of requests time out. Experimental
results of this study show that increasing the number of users has increased
the average response time. Similarly, the number of request time out increasing
with increasing number of users. It means that the qualities of service
received by user are decreasing also. We found that the impact of the number of
users on the quality of service is no longer in linear trend. The results of
this study can be used as a reference model for the network operator in
performing services in which a certain number of users in order to obtain
optimal quality services.
