[Maps-l] Tile expiry, a new attempt

[Tim Alder]

Hello,
please have in mind that we take the osm-labels-lang styles in  
wikipedia only for zoom 0-6. For the more interesting zoom-levels we  
take only default style for performance reasons. The only exeption is  
the small hsb.wp ("Obersorbisch").

People from ru.wp ask me to support russian but I did affraid that it  
will be too much load for us. But now is russian map so popular that  
it is perhaps usefull, we should use pre-rendering for it.

|Kay: Please excuse my ignorance, but what is "default"? Is it the same as
|"osm"?
Yes.

Greetings Kolossos


Zitat von Kai Krueger <kakrueger at gmail.com>:

> Hello everyone,
>
> Over the past month, the server has been busy trying to re-render all of
> the tiles to try to ensure more up-to date maps. This process is more or
> less complete now and all of the map tiles should then be at least from
> the 1st of December 2011.
>
> As one month old tiles is still not overly satisfying, I am now trying
> to re-activate diff based tile expiry again.
>
> The full expiry of all styles remains infeasible for the moment and so I
> am trying to introduce expiry slowly to see how far it can be pushed.
>
> As a start, I have activated tile expiry only for the highest zoom
> levels (z15 - z18) and then only for the styles that currently are
> embedded in one of the wikipedias.
>
> As far as I can tell these are the following styles:
>
> osm-no-labels osm-labels-de osm-labels-ca osm-labels-bg osm-labels-da
> osm-labels-el osm-labels-es osm-labels-fa osm-labels-fr osm-labels-it
> osm-labels-lv osm-labels-nl osm-labels-no osm-labels-pl osm-labels-ru
> germany default hikebike
>
> If anyone knows of a language that I have forgotten, please let me know
> and I will include it as well.
>
> So far, it looks like the server can cope with this, although I have
> only activated it earlier today. Should it remain this way, I will try
> and expand the zoom levels.
>
> As it is critical to reduce the number of low zoom tiles rendered, as
> those still kill performance, lower zoom tiles will probably not be
> expired as frequently. E.g. perhaps Z14 - Z11 on a daily basis, below
> that even only in the background.
>
> We will have to see, though, how performance behaves over time.
>
> Happy new year,
>
> Kai
>
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