[Tilesathome] another idea for more performance

[Damian Sulewski]

Hi,
Am Montag, den 28.05.2007, 15:04 +0100 schrieb OJW: 
> On Sunday 27 May 2007 22:51, Damian Sulewski wrote:
> > 2. if server receives a blank_tile it removes all meta info and files
> > under it from disk, marking only this tile as blank.

this IS a thing i did not think of, so we are stuck on up to 1364
REPLACES on every tileset. 

> 
> What if that area contains features which are only visible on a higher zoom 
> level?  You don't know that the subtiles are blank just because the tile 
> above is.
> 
> Also, this makes it trivial to delete the whole world, by uploading a blank 
> tile at zoom 0.
> 

Now you can generate blank tiles for the whole world and upload this
set. Ok more work, but not harmless if there is a bug in lowzoom.

Greetings,

Damian


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