[Tilesathome] tah refactor - identical file names

[Matthias Julius]

spaetz <osm at sspaeth.de> writes:

> On Fri, Aug 29, 2008 at 02:37:13PM +1200, Rob Reid wrote:
>> I'm experiencing a similar problem which seems to result in tilesets
>> getting merged on the client and possibly discarded on the server,
>> it is not fixed by rev 10282 which added the timestamp back in.
>
>> Note that there is 6 tilesets being compressed and only zip 3 files
>> being uploaded.
>
> Right, I can see why that would be happening :-). Timestamps are
> second-based, so if you compress tilesets containing the same layer
> within the same second they will be named the same (and one of them
> will be overwritten).
>
> I will change the zip file naming code to really use
> LAYERNAME_Z_X_Y.zip which is easier (we could add the client_uuid but
> hey it's a feature if several clients render the same tileset that the
> latest would win).

This would be a good feature as the tiles would be overwritten on the
server anyway.  Better to save bandwidth and overwrite them on the client.

But the client_uuid is in there to tell the uploading client which
uuid to tell the server when uploading an tileset.  If you find
another way of conveying this information - go ahead. 

Matthias