On 20-10-2010 15:51, Samir Faci (Dev) wrote:
I was going to submit a patch... but I wanted to understand the
intended purpose of these changes.
The intended purpose was to remove the need to setup rendering threads
with renderd, when they wouldn't be used anyway.
it seems like the program flow now is to only render in combination
with touchFrom or deleteFrom.
That's a bug. The default behaviour is to rerender tiles, and only when
a suitable combination of min-zoom and touch-from/delete-from is given,
to switch to those exclusively. I just committed a fix that does more
explicit checking of these combinations.
So, for example:
Expire tiles z9 and up by setting their timestamp to the past. This
causes mod_tile to issue a rerender the next time the expired tile is
requested:
--min-zoom=9 --touch-from=9
Rerender tiles z8-11 and touch z12+. The lower zooms take much longer to
render, so this rerenders those right away, while delaying rendering the
higher zooms until someone actually looks at them.
--min-zoom=8 --touch-from=12
If you give no min-zoom/max-zoom (default is 0 and 18 respectively), and
no touch-from/delete-from, it will go through all zooms and rerender
them, based on the input file.
--
Lennard
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