On Sun, Feb 12, 2012 at 4:56 PM, Andrea Aime
<[email protected]>wrote:
> On Sun, Feb 12, 2012 at 7:54 PM, Gabriel Roldan <[email protected]>wrote:
>
>>
>>> Tens? Or else, the area is very small (county or smaller), or the zoom
>>> level is not thought to match Google Maps (does not go down to 20).
>>> See this spreadsheet to estimate the size of a tile cache for a fully
>>> developed tile cache, on disk,
>>> for a certain area:
>>>
>>> https://docs.google.com/spreadsheet/ccc?key=0Aq3GF1EnUyHEdHlDSW03cno4NzUzRFVHQzlGeU9YYXc#gid=0
>>>
>>> I've filled it with the Massachusetts bounds, at level 20 the tile
>>> cache uses 4TB of disk.
>>>
>>
>> My read of it is it's 4G?
>>
>
> Doh, right!
>
>
>>
>>
>>> You don't go very far with one of the above for each possible
>>> time/elevation value...
>>>
>>
>> Yet that's still the danger wrt disk usage, and where disk quota and
>> min/max cached zoom levels come to play [1].
>> Yeah, you won't have exactly a static tile cache, but you need to make
>> some compromises when disk usage is a concern.
>>
>
> Hmm.. so far I've hit few cases where the disk usage is not a concern,
> more often than not the area
> that one needs to depict seems to grow faster than the ability to buy disk
> for it (meaning, local data
> handlers often cannot afford a serious NAS, and those that do often have
> continents to deal with,
> at that point the NAS are small anyways... and disk quota does not
> cluster, making GWC not usable in those cases
> since HA is a requirement ... )
>
Indeed. Working hard to get there.
Cheers,
Gabriel
>
> Cheers
> Andrea
>
> --
> -------------------------------------------------------
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
> mob: +39 339 8844549
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
> -------------------------------------------------------
>
--
Gabriel Roldan
OpenGeo - http://opengeo.org
Expert service straight from the developers.
------------------------------------------------------------------------------
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