[OSM-talk] a, b and c.tile.openstreetmap.org refer to the same server?

[Jochen Topf]

On So, Mai 17, 2015 at 04:46:24 +0200, Maarten Deen wrote:
> Is it normal that the a, b and c.tile.openstreetmap.org IP-adresses refer to
> the same server? For me, they all refer to amsterdam.tile.openstreetmap.org
> and for some reason it is not responding very well (lots of read times out
> messages in JOSM).
> To me it would seem more logical to have different tileserveraliases refer
> to different physical servers.

Thats normal. The a/b/c stuff is a workaround for a "feature" in browsers that
only allow a limited number of connections to the same host at the same time.
(Modern browsers probably don't have this limitation any more, sombody should
probably check whether we need the a/b/c stuff any more.) It is not ment to
be some kind of load-balancing.

And in this case it wouldn't really help to make those aliases to different
servers. If one of them is slow your map will still be patchy.

Jochen
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Jochen Topf  jochen at remote.org  http://www.jochentopf.com/  +49-351-31778688