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From Sylvain Lebresne <sylv...@yakaz.com>
Subject Re: History values
Date Wed, 14 Apr 2010 07:45:25 GMT
> I am new to using cassandra. In the documentation I have read, understand,
> that as in other non-documentary databases, to update the value of a
> key-value tuple, this new value is stored with a timestamp different but
> without entirely losing the old value.
> I wonder, as I can restore the historic values that have had a particular
> field.

You can't. Upon update, the old value is lost.
>From a technical standpoint, it is true that this old value is not
deleted (from disk)
right away, but it is deleted eventually by compaction (and you don't
really control
when the compactions occur).

--
Sylvain

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