Differences between process scheduling and Job Scheduling

One statement:

Differences between process scheduling and Job Scheduling:

(1) Job Scheduling is macro scheduling, which determines which job can enter the primary storage. Process Scheduling is micro-scheduling. It determines which process in each job occupies the central processor.

(2) Job Scheduling is to select a qualified hosted job to load it into the memory. Process Scheduling selects a processor from a ready-state process.

Another statement:

Processor Scheduling is one of the main functions of the operating system. Its implementation policy determines the type of the operating system. The advantages and disadvantages of its scheduling algorithm directly affect the performance of the entire system. A task scheduled by a processor selects a job or process to be dispatched and assigns a processor to it.

Generally, Processor Scheduling can be divided into three levels: Advanced scheduling, intermediate scheduling, and low-level scheduling.

Advanced scheduling is also called Job Scheduling. A job is a collection of user programs and their required data and commands. Job Management is a collection of programs that manage the execution of jobs systematically. The main function of the Job scheduler is to review whether the system can meet the resource requirements of user jobs and select jobs based on certain algorithms.

The main purpose of intermediate scheduling is to improve the memory utilization and system throughput, so that temporarily not running processes change from memory to external memory.

Low-level scheduling is also called process scheduling. Its main function is to assign the CPU to a process in the ready queue according to certain algorithms. Process Scheduling is the most basic scheduling in the operating system. Its Scheduling Policies directly affect the performance of the entire system.