| Performance metrics |
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| • | Transaction
& database systems |
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| • | Number
of transactions per second |
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| • | Focus
on seek and rotational latency, not bandwidth |
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| • | Track
caching may be irrelevant (except read-modify-write) |
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| • | Many
little files (e.g., Unix) |
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| • | Speed
of access is key. Cache entire (small) file |
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| • | Big
files |
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| • | Focus
on bandwidth and contiguous allocation |
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| • | Seek
time is secondary concern |
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| • | Paging
support for VM |
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| • | A
combination of both |
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| • | Track
caching is highly relevant – locality of reference |
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