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| Disk Cache |
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| (same principles) |
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| ä | A
portion of main memory used as a buffer |
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| to
temporarily to hold data for the disk |
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| ä | Locality
of reference also applies here: |
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| once
a record gets referenced, it is likely |
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| that
nearby records will get referenced |
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| often
in the near future. |
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| ä | If a
record referenced is not in the disk |
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| cache,
the sector containing the record is |
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| moved
into the disk cache. |
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