On Thu, Aug 27, 2015 at 09:24:46AM -0400, Barry Warsaw wrote: > On Aug 27, 2015, at 07:17 AM, Thomas A. Moulton wrote:
> >From watching the various updates my Tablet (flo) has received, aren't > >the OTA updates deltas? If so, then would it be expected to have >500MB > >of changes between updates often? In the most recent update I think I > >saw about 148MB downloaded. > That does speak to a few other possible options. system-image-cli (although > not really the D-Bus API) supports a --filter flag that can be set to full or > delta, to force one or the other choices in candidate path upgrades. You > could force a full upgrade which was less than the highest, where the > subsequent deltas would contain only libreoffice. That might make the > individual downloads fit within the partition size, at the cost of a two-step > upgrade. The design of this system should not rely on the delta being substantially smaller than a full upgrade at all points. When the stable channel gets bumped from vivid vervet to xanthic xenomorph, for example, you may have a delta that's smaller than the full update - but maybe it's smaller by only 5-10%. The upgrade path needs to be robust against such a scenario. -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ [email protected] [email protected]
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