Why there is an extra job?

So if you have ten tasks and you would see there are actually 11 jobs running. The additional job that we add is the data stage-in job that moves all input data into the datacenter. However, the implementation may change based on the type of file system (Shared, Local, etc.)

You may also find the task runtime is 0.11sec. The reason is that CloudSim would require a job to run at least 0.1 seconds otherwise it will ignore this job. So we set the minimum runtime of each job (including normal compute jobs) to be 0.11 sec. In many cases, the network bandwidth is not a bottleneck so the network transfer delay is not significant. But if you decrement the network bandwidth, you will find the actual runtime of this data stage-in job is no longer 0.11 sec.