I have been doing some work in MySQL lately so have been looking up on how to optimise this beast. Some good info on how companies are putting it to use out there but some of it goes right over my head. Got to hit those books…
O’Reilly Radar > Database War Stories #3: Flickr
“lots of the ‘web 2.0′ feature set doesn’t fit well with traditional normalised db schema design. denormalization (or heavy caching) is the only way to generate a tag cloud in milliseconds for hundereds of millions of tags.
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