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[FEATURE] Option to skip writing filled tiles? #168

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msbarry opened this issue Apr 8, 2022 · 0 comments · Fixed by #234
Closed

[FEATURE] Option to skip writing filled tiles? #168

msbarry opened this issue Apr 8, 2022 · 0 comments · Fixed by #234
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@msbarry
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msbarry commented Apr 8, 2022

MBtiles writing is a single-threaded bottleneck when generating output for the planet that takes up at least ~15 minutes mostly due to repeated ocean tiles:

image

It's possible to reduce mbtiles output phase to ~4 minutes (and reduce mbtiles size by 25%) by skipping filled tiles. Some clients can handle this by requesting parent tiles and overzooming when they get a 404. But some can't (or it might not be desirable) so this should be an opt-in feature if we want to do it at all.

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