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From Peter Schuller <>
Subject Re: rolling window of data
Date Thu, 03 Feb 2011 16:47:46 GMT
> The correct way to accomplish what you describe is the new (in 0.7)
> per-column TTL.  Simply set this to 60 * 60 * 24 * 90 (90 day's worth of
> seconds) and your columns will magically disappear after that length of
> time.

Although that assumes it's okay to loose data or that there is some
other method in place to prevent loss of it should the data not be
processed to whatever extent is required.

TTL:s would be a great way to efficiently achieve the windowing, but
it does remove the ability to explicitly control exactly when data is
removed (such as after certain batch processing of it has completed).

/ Peter Schuller

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