Short-Long and medium-term scheduling

Question

Describe the term short, long and medium-term scheduling? Describe all the terms in detail.

Answer 1

Long term scheduler finds out which programs are admitted to the system for processing. This controls the degree of multiprogramming. Once admitted, then a job becomes a process.

Medium term scheduling is a part of the swapping function. This associates to processes which are in a blocked or suspended state. They are swapped out of real-memory till they are ready to carry out. The swapping-in decision is based on the memory-management criteria.

Short term scheduler, as well termed as a dispatcher executes most often and makes the finest-grained decision of which method must execute next. This scheduler is invoked if an event takes place. It might lead to the interruption of one process through preemption.