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Papers > Technology > Record Storage and Primary File Organizations
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Record Storage and Primary File Organizations |
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• In a modern computer system data resides and is transported throughout a hierarchy of storage media. • The primary storage level: • Cache memory: used by the CPU to speed up execution of programs also known as static RAM • Main memory: provides the main work area for the CPU for keeping programs and data also known as dynamic. • The secondary storage level: This includes magnetic tapes, mass storage, flash memory, optical juke box memories. • Most databases are stored permanently on magnetic disk secondary storage for the following reasons: • Databases are too large to fit in main memory • The cost of storage per unit of data is an order of magnitude less for disk than for primary storage • The circumstances that cause permanent loss of data arise less frequently for disk secondary storage than for primary storage. |
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Title: Record Storage and Primary File Organizations
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