Summary
Summary Controlling and Managing Systems
- Institution
- PEARSON (PEARSON)
Detailed Notes on Controlling and Managing Systems.
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Kernelso Kernels are computer programs that are at the centre of the operating system and
allows complete control over the system.
o They can:
Manage the device
Memory
Computers resources
Security
Allocate memory to applications so they can operate
o They work by:
It starts up (first thing the device does at start up)
The kernel remains in the computer memory to help support the running of
the device
Kernel is small as it stays in the memory but doesn’t interfere with smooth
running of the machine
Loaded to protect area to stop being deleted or overwritten
Every operating system has kernels
Different operating systems have different type of kernels
Monolithic kernels
o Linux is an example of an older monolithic kernel
o Problems
Poor maintainability
Bug fixing required
The size of the kernel was huge
This slows the device down
o New systems
Kernels are packaged in multi-modules which can be loaded/unloaded
separately as they perform different operations on the machine
o Maintenance benefits
Maintenance can be done on each separate kernel without restarting the
whole system
Micro Kernel
o
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