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I know how redo logs and their commits are supposed to work, but I was wondering if anyone knew how the undo log itself works as well... is it supposed to be a faster way to do logging as opposed to redo log? Or do they both have drawbacks that the other does not?

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I think the log (or journal) is for both redoing and undoing? – Oct 25 '11 at 2:34
You just don't overwrite material. Like Hansel and Gretel. – surfasb Oct 25 '11 at 2:43

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