One of the general suggestions for database physical storage is to maximize disk contention. The statement is false as indexes do not enable join operations easier.
Records-containing file formats are used to hold databases. Three types of storage devices—primary, secondary, and tertiary memory—can be broadly distinguished. The actual data is kept on a physical device in electromagnetic representation. Larger storage devices are less expensive and offer slower speeds, but they can store far more data than CPU registers or cache memory can. In RAID systems, storage volumes are produced utilizing a single disk.
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