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+-   eBay makes huge gains in parallel efficiency-> on Friday October 17 2008, @10:49AM CurtMonash

Submitted by CurtMonash on Friday October 17 2008, @10:49AM
supercomputing
CurtMonash writes "Parallel Efficiency (PE) is a simple metric that divides the actual work your parallel CPUs do by the sum of their total capacity. If you can get your parallel efficiency up, it's like getting free servers, free floor space, and some free power as well. eBay reports that it amazed even itself by increasing overall parallel efficiency from 80% in about 6 months — across 10s of 1000s of servers. The secret sauce was data warehouse-based analytics. I.e., eBay instrumented its own network to do minute-by-minute status checks, then crunched the resulting data to find where bottlenecks that needed removing. Obviously, savings are in the many millions of dollars. eBay has been offering some glimpses into its analytic efforts this year, and the PE savings are one of the most concrete examples they're offering to validate all this analytic cleverness."
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