Caching OSM tiles

[Cedric Jeanneret]

On Tue, 11 May 2010 11:34:32 +0400
Igor Sysoev <igor at sysoev.ru> wrote:

> On Tue, May 11, 2010 at 08:37:19AM +0200, Cedric Jeanneret wrote:
> 
> > Hello!
> > 
> > I'm currently developping a really tiny app using OpenLayers[1] and OpenStreetMap[2]. 
> > As I was testing it, I saw that sometimes tiles don't come. I guess this is caused by server load at OSM. So I was thinking about caching some tiles so that it won't overload OSM, and my app will work nicely.
> > 
> > Has anybody ever tried it ? if so, how can we do it ?
> > If no one has tested/tried it, any hints/ideas ?
> > 
> > I guess I should configure a special vhost like "tiles.domain.ltd", proxy-ing tiles.openstreetmap.org, with some caching, and tell OpenLayers to use OSM tiles through this proxy. Right ?
> 
> Yes.
> 
> 
Just for the posterity:

proxy_cache_path  /home/tilecache  levels=1:2:2   keys_zone=tilecache:1536m;

server {
  listen 94.23.198.39:80;
  server_name tiles.domain.ltd;

  access_log  /var/log/nginx/tiles_access.log main;
  error_log   /var/log/nginx/tiles_error.log info;
  location / {
    proxy_pass        http://tile.openstreetmap.org/ ;
    proxy_cache       tilecache;
    proxy_cache_key "$scheme$host$request_uri";
    proxy_cache_valid  200 302  300h;
    proxy_cache_valid  404      1m;
  }
}

And I modified openlayers.js in this way :
- true,url:'http://tile.openstreetmap.org/${z}/${x}/${y}
+ true,url:'http://tiles.internux.ch/${z}/${x}/${y}

It just works fine.

Beware of cache size - mine is a small one as I'm not coverring a big area.

Thanks again.

C.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: not available
URL: <http://nginx.org/pipermail/nginx/attachments/20100511/995c172f/attachment.pgp>