[OSM-dev] What can we do to get a tile.openstreetmap.org contributable CDN within a month?

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Fri Dec 30 17:23:15 GMT 2011

I would love to monitor such discussion and contribute if I think I have 
something to offer.  Will such discussion be here on the [OSM-dev} or 

I currently use the freely available CoralCDN (http://www.coralcdn.org/) 
to distribute updates to my APRSISCE/32 APRS client software 
(http://aprsisce.wikidot.com/), but have mixed results (like only about 
50% success, but every cached delivery saves my original bandwidth).  
Thankfully I built in a direct backup link that picks up the slack from 
the failures.

Theoretically the CoralCDN could be used for distributing OSM tiles by 
simply suffixing the domain with ".nyud.net", but I have not tried this 
yet.  There would be little to no intelligence brought to bear on how 
long individual tiles would be cached vs flushed and/or whether 
mixed-revision tiles would be present in and delivered from the cache, 
not to mention that I don't think the CoralCDN passes through the 
original User-Agent either.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 12/30/2011 12:10 PM, Stefan de Konink wrote:
> Hash: SHA512
> The basic outline;
> - - People seem to love using tile.openstreetmap.org for any of their apps
> - - Apps get blocked for various reasons, contributing back is difficult
> - - OpenStreetMap wants to be the leading provider of such data
> I would propose a small working group to outline what should happen to
> facilitate the creation of a Content Delivery Network (CDN) serving
> the basic tiles, and allow easy contribution this network. This should
> produce a prototype of at least 3 servers.
> Questions such as: quality, update frequency, traffic shaping,
> geographical balancing and high availability could be part of this
> working group.
> I would like to invite anyone to participate, especially:
>   - people that already have their own tileservers running, and/or
>     are currently balancing traffic;
>   - business folks: what could be a motivation and what can be a
>     cutback in for example attribution,
>   - users of for example openlayers, etc. what kind of caching can
>     be applied, and if this should be configurable client side
> Participation can announced in private or on list.
> Stefan
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