[Mageia-discuss] Suggestions for the ISO

Luca Berra bluca at vodka.it
Mon Nov 8 07:43:30 CET 2010

On Sun, Nov 07, 2010 at 11:43:46PM +0100, Renaud MICHEL wrote:
>On dimanche 07 novembre 2010 at 22:33, Luca Berra wrote :
>> > you must include all intermediate updates packages to create the delta.
>> you just have to keep track of package 1 and n-1, not all of them
>No, because a roll back of a file can happen on any update. If a file is 
>changed in release n-2 and rolled back in n-1, if you only consider packages 
>1 n-1 and n you miss the roll back for the people who updated to n-2 but 
>missed the update to n-1.

No, sir,

If n contains n-1 this remains true at every increment of n, so you
never need to look at n-2 because n-1 already contains it.

But besides the teoric discussions there is no code project to do this,
so all of this discussion is leading nowere.
current deltarpm code works by creating binary deltas between two given
rpms and, besides the fact we are not even sure it works with current
lzma compressed rpms, the points raised by nanar all hold. so i dont'
believe we will use deltarpm as it is.


Luca Berra -- bluca at vodka.it

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