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Komputer sebagai Perangkat Komputasi Universal

Computers as Universal Computational Devices It may seem strange that an introductory textbook begins by describing how computers work. After all, mechanical engineering students begin by studying physics, not how car engines work. Chemical engineering students begin by studying chemistry, not oil refineries. Why should computing students begin by studying computers? The answer is that computers are different. To learn the fundamental prin- ciples of computing, you must study computers or machines that can do what computers can do. The reason for this has to do with the notion that computers are universal computational devices. Let’s see what that means. sumber: buku Introduction to computing systems from bits & gates to c-c++ & beyond

OS tuning

sumber: https://documentation.suse.com/sles/12-SP5/html/SLES-all/preface-tuning.html

System Analysis and Tuning Guide

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  12  Tuning I/O Performance     I/O scheduling controls how input/output operations will be submitted to storage.  SUSE Linux Enterprise Server  offers various I/O algorithms—called  elevators —suiting different workloads. Elevators can help to reduce seek operations and can prioritize I/O requests. Choosing the best suited I/O elevator not only depends on the workload, but on the hardware, too. Single ATA disk systems, SSDs, RAID arrays, or network storage systems, for example, each require different tuning strategies. 12.1  Switching I/O Scheduling     SUSE Linux Enterprise Server  picks a default I/O scheduler at boot-time, which can be changed on the fly per block device. This makes it possible to set different algorithms, for example, for the device hosting the system partition and the device hosting a database. The default I/O scheduler is chosen for each device based on whether the device reports to be rotational disk or not...