Parkinson's Law of Data

Parkinson's Law of Data

"Data expands to fill the space available for storage"; buying more memory encourages the use of more memory-intensive techniques. It has been observed over the last 10 years that the memory usage of evolving systems tends to double roughly once every 18 months. Fortunately, memory density available for constant dollars also tends to double about once every 12 months (see Moore's Law); unfortunately, the laws of physics guarantee that the latter cannot continue indefinitely.
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Indeed, analysts cite "Moore's Law" -- that the quantity of information that can be stored on a chip of given size doubles every year -- or "Parkinson's Law of Data" -- memory usage doubles every 18 months, while the memory density a dollar can buy doubles every 12 months -- as the Two Commandments of data storage.

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