The first test was performed to evaluate the ability of the master node in handling the user requests for job submission. As described in the previous section, the users submit a job through a JSP page, which runs a separated thread for each user. This means that multiple threads will run on the same node in case that several users access the submission page and submit the job at the same time. We modeled this scenario and found that the more users try to submit a job at the same time, the more time is needed to perform the submission process. For example, when the number of requests is increased from one to one hundred, the minimal time needed for handling a request raises in five folds. A solution is to deploy separated servers to run the HTTP service for guaranteeing the performance of master node. This is one of the future work.