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Some Rough Statistics (from August 29th, 1996)
BackRub is written in Java and Python and runs on several Sun Ultras and Intel Pentiums running Linux. The primary database is kept on an Sun Ultra II with 28GB of disk. Scott Hassan and Alan Steremberg have provided a great deal of very talented implementation help. Sergey Brin has also been very involved and deserves many thanks.
-Larry Page pagecs.stanford.edu
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There's something to be said about rapid prototyping and evaluation.