Partitioning

• Each one requires more resources

Fixed partitioning

<aside> 👇 Dividing memory into non-overlapping sizes that are fixed

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• A process may be loaded into a partition of equal or greater size and is confined to its allocated position
• Small processes are loaded into the same partition as bigger processes, as all partitions are the SAME SIZE
• Internal fragmentation - the unoccupied space
• Results in occupied partitions with lots of unoccupied space

Variable partitioning

<aside> 👇 Dividing memory into non-overlapping BUT variable sizes

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• Matching the size with the space that we have got, thus small processes are allocated to small partitions and large processes allocated to larger partitions

Dynamic partitioning

<aside> 👇 Making partitions during run-time according to process’s need instead of partitioning during system configuration

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• Problem: requires more resources, RAM etc.

Buffering

<aside> 👇 The temporary storage of data during input, output or internal transfer of data in a computer system

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Single buffering

• A buffer - a small block of memory in decides where the current data is being held
• Another way of managing the CPU - i.e. when something is sent to print, the data goes to the buffer in the printer so that it can be held until the printer is ready, freeing up the CPU