On 17/01/14 08:08 PM, hero...@gentoo.org wrote: > Michał Górny <mgo...@gentoo.org> writes: > >> However, it may be actually beneficial to provide other durations, like >> weekly deltas. In my tests, the daily updates for this week summed up >> to almost 50M while the weekly was barely 20M. > > Is there a way to merge the deltas without the original squashfs?
Uh... what? How would that work? > how fast is the delta generation? Very. > It could be done on the server side on the fly and cached. Too much work. > Or we provide a set of 16,8,4,2,1 day deltas, then > > 16d: 1 piece needed > 8d: 2 needed > 4d: 4 needed > 2d: 8 needed > 1d: 16 needed > > The total of 31 pieces will cover a month (31 days) with at most 5 > deltas to be downloaded. > > e.g. If the system is 19 days old, then we download a 1d, 2d, and 16d. > This doesn't really help. Consider that deltas require both a *start* and *end*. It's not as simple as adding it all up, since you would need a 19-3d, then 3-1d, then 1-0d.
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