big data feature: variability-in-biz-Value

RDBMS – every row is considered “high value”. In contrast, a lot of data items in a big data store is considered low-value.

The oracle nosql book refers to it as “variability of value”. The authors clearly think this is a major feature, a 4th “V” beside Volume, Velocity and Variety-of-data-format.

As a result, data loss is often tolerable in big data (but never acceptable in RDBMS). Exceptions, IMHO:
* columnar DB
* Quartz, SecDB

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