On 02/07/2013 13:55, Mark Felder wrote: > If twitter was built upon a WORM database instead of MySQL they could > host the entirety of twitter on a handful of servers instead of the > gross MySQL+Cassandra mess they're fighting with today.
I'd say their problem is not exactly solvable by only choosing a database :D They, like Facebook, have the problem of "fanout", where a single piece of data goes into thousands of different user pages. Whatever they save in the raw data access operations will probably be relatively small compared to the horsepower needed to combine pages from all these fleeting data pieces. But yes, obviously a database designed specifically for one thing will be optimized for that thing.
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