[Tilecache] metatiling across multiple servers

[Christopher Schmidt]

On Wed, Feb 13, 2008 at 03:14:44PM -0500, Paul Spencer wrote:
> I am wondering if it is possible to have tile cache make use of meta  
> tiles when you have several servers involved in tiling.  Specifically,  
> I have something like:
> 
> tc1.xxxx.yyy, tc2.xxxx.yyy <- server 1
> tc3.xxxx.yyy, tc4.xxxx.yyy <- server 2
> 
> so half the tiles are on server 1 and half are on server 2.  This  
> makes me think that using meta tiles would be wasting space because  
> I'd end up with all the tiles on both servers.  Is there a way to  
> configure things so that it can use meta tiles and still end up with  
> distributing the disk space between the two servers efficiently?  The  
> reason for wanting to use meta tiles is to avoid the minor edge  
> effects and duplicate labeling problems that occur when rendering  
> tiles using mapserver.

You could change the OpenLayers servername distribution function
(selectUrl, I believe it's called) to distribute based on metatiles,

Regards,
-- 
Christopher Schmidt
MetaCarta