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 ... )
Cheers
Andrea
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