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ODS<br />
▪ Oper<strong>at</strong>ional D<strong>at</strong>a Store<br />
▪ System metrics (CPU, Memory, IO, Network)<br />
▪ Applic<strong>at</strong>ion metrics (Web, DB, Caches)<br />
▪ <strong>Facebook</strong> metrics (Usage, Revenue)<br />
▪ Easily graph this d<strong>at</strong>a over time<br />
▪ Supports complex aggreg<strong>at</strong>ion, transform<strong>at</strong>ions, etc.<br />
▪ Difficult to scale with MySQL<br />
▪ Millions of unique time-series with billions of points<br />
▪ Irregular d<strong>at</strong>a growth p<strong>at</strong>terns
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