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Unit 8: Analysis 1: System Performance File system fragmentation, sometimes called file system aging, is the inability of a file system to lay out data sequentially. File system fragmentation increases disk head movement, or seeks, which are known to hinder throughput. It is projected to become more problematic with newer hardware due to the increasing disparity between sequential access speed and rotational latency of consumer grade hard disks, on which file systems are usually placed. File system fragmentation has less of an impact on newer solid state drives because there is no mechanical seek time involved like rotating media; however, additional non-sequential I/O operations impacts system performance and many file system architectures consume additional internal resources when fragmentation is present. A process is software that performs some action and can be controlled by the user, by other applications, or by the operating system. The operating systems controls and schedules processes for execution by the CPU. In a multi-tasking system, the operating system must arrange the execution of various processes so the user believes several things are happening at once. This is complicated by the CPU, which can handle only one task at a time. Even newer CPUs, with multiple cores, are limited. Each core of a CPU can still handle only one task at a time. Each process has a status associated with it. Many processes utilize no CPU time until they get some sort of input (such as a keystroke from the user). As soon as that input is received, the operating system switches the status. This swapping technique goes unnoticed by the user and without direct user interface. Each process gets enough CPU cycles to accomplish the given task in an appropriate amount of time. A problem arises when a user attempts to run too many applications or processes at one time. The

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