Bug#372712: not just daily updates?
I suspect that part of the problem is the large number of updates. Have there
been any tests on having daily and weekly updates? If I have not updated for
13 days then there is going to be a complete calendar week in that time
period, so the download would be one weekly pdiff and 6 daily diffs.
As the download speed appears to be based on the number of diffs not their
size this should decrease the time significantly.
Another possibility might be to have differnt pdiff files generated based on
powers of two. So you have a directory of daily diffs, a directory for every
second day, a directory for every four days, and on until 128 or 256 day
diffs. That would mean that the maximum number of diffs needed would be the
log of the number of days base 2. It would also be easy for modem users to
arrange their downloads on days that are a multiple of 16 to minimise
downloads.
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