2011/1/13 Lluís Batlle i Rossell <[email protected]>
> Hello,
>
> what is the logic about committing delta manifests, or baseline manifests?
> I imagine it is written to achieve automatically some "optimum", and that
> it
> does not require any manual decision.
>
> Am I right? And what is the optimum, in that case?
>
Copy/paste from the checkin.c source code file:
/*
** At this point, two manifests have been constructed, either of
** which would work for this checkin. The first manifest (held
** in the "manifest" variable) is a baseline manifest and the second
** (held in variable named "delta") is a delta manifest. The
** question now is: which manifest should we use?
**
** Let B be the number of F-cards in the baseline manifest and
** let D be the number of F-cards in the delta manifest, plus one for
** the B-card. (B is held in the szB variable and D is held in the
** szD variable.) Assume that all delta manifests adds X new F-cards.
** Then to minimize the total number of F- and B-cards in the repository,
** we should use the delta manifest if and only if:
**
** D*D < B*X - X*X
**
** X is an unknown here, but for most repositories, we will not be
** far wrong if we assume X=3.
*/
>
> Regards,
> Lluís.
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--
D. Richard Hipp
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