Answer to Question #253839 in Computer Networks for Ikraam Kader

Question

Consider a system with 13 dedicated devices of the same type and all jobs currently running on this system require a maximum of three devices to complete their execution but they each run for long periods of time with just two devices and request the remaining one only at the very end of the run. Assume that the job stream is endless and that your operating system’s device allocation policy is a very conservative one: No job will be started unless all the required drives have been allocated to it for the entire duration of its run. a. What is the maximum number of jobs that can be in progress at once? Explain your answer.

Answer 1

As here three devices are interconnected over the network,

The maximum number of devices require to complete their execution = 3

As here two devices are already allocated the job and it is running for the so long period of time.

Hence the maximum number of jobs that can be progress at once be 2