Batch Systems

Scheduling Algorithm Goals
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Scheduling Algorithm Goals

To design a scheduling algorithm, it is essential to have some idea of what a good algorithm should do. Some goals depend on the environment (batch, interactive, or real time), but there are also some that are suitable in all cases. Some goals are listed in Figure

Scheduling in Batch Systems
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Scheduling in Batch Systems

It is now time to turn from general scheduling issues to specific scheduling algorithms. In this section we will study algorithms used in batch systems. In the following ones we will study interactive and real-time systems. It is worth pointing out that some algorithms are used in both

Shortest Process Next
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Shortest Process Next

Because shortest job first always creates the minimum average response time for batch systems, it would be nice if it could be used for interactive processes as well. To a certain extent, it can be. Interactive processes usually follow the pattern of wait for command, execute

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