Answer to Question #258367 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.

Under what circumstances an additional job would be started ?

Answer 1

Total dedicated devices = 13

Total number of devices = 3

Number of devices involved in the execution process = 2

as per the question, it states that the operating system supports the conservative device allocation policy. So, no additional job will be started unless and until all devices have been allocated a job during its run.