Facebook: From Function-Based to Resource-Based Servers With the Disaggregated Rack
Most of the servers are configured depending on the functionality they'll provide: here are the web servers, here were the cache servers, and these are the database servers. Facebook has been using the same approach, but according to Mark Hackman's post: " How Facebook Will Power Graph Search ", they'll start looking into having resource-based racks: here's the compute power, here's the RAM, and here's the storage. If you think about it, this is exactly how Amazon has structured their cloud infrastructure services.
via NoSQL databases
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