[OSM-dev] Paging the tile server admins

[Kai Krueger]

Tom Hughes-3 wrote:
> 
> Unfortunately having to check access tokens on tile requests adds
> overhead which would reduce the total number of tiles we could serve so
> it would be a bit self defeating.
> 
>From what I have seen, the limiting factor of tile serving is seldomly the
actual tile serving. Mod_tile can fairly easily saturate a 1 Gbit/s network
with several 10 thousands of tiles per second. (i.e. an order of magnitude
greater than what tile.osm.org currently serves) The bottle neck is more
likely to be disk I/O to fetch tiles or network bandwidth.

So assuming that the access token check only needs CPU resources and no disk
I/O, the added overhead will possibly not have any practical effects.

The question though is, what would one gain by having an access token check?
A per IP limit is imho more useful.



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