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Computer Processes

In: Computers and Technology

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1. Computer Processes * Processes can be defined as programs that are being executed within a computer system. The computer program refers to a number of instructions that are issued by the users of the computers, while the processes are the execution of the instructions. One program can have several processes related to it. * Computer processes are named after the operating system that is running them. In this case therefore the names of the processes will differ depending on the operating system that is running them.

* Multi-Processing * Foreground Processes - Background Processes * Processes versus Threads

2. Memory Management * Is the act of managing computer memory. The essential requirement of memory management is to provide ways to dynamically allocate portions of memory to programs at their request, and freeing it for reuse when no longer needed. This is critical to the computer system. * The memory manager implements virtual memory provides a core set of services such as memory mapped files, copy-on-write memory, large memory support, and underlying support for the cache manager.

3. File Systems * Is a means to organize data expected to be retained after a program terminates by providing procedures to store, retrieve and update data, as well as manage the available space on the device(s) which contain it. A file system organizes data in an efficient manner and is tuned to the specific characteristics of the device. A tight coupling usually exists between the operating system and the file system. Some file systems provide mechanisms to control access to the data and metadata. Ensuring reliability is a major responsibility of a file system. Some file systems allow multiple programs to update the same file at nearly the same time. * File systems are used on data storage devices, such as hard disk drives,…...

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