[MapProxy] FW: Which cache is better

[Travis Kirstine]

David,

If your primary concern is interoperability and portability I would look at
mbtiles or geopackage.  Both cache types store the tiles in a single file
which could be used in a few platforms and easily backed up.  The only
issue with these caches (sqlite) it a tendency to lock up during heavy
concurrent writes, mapproxy has implemented bulk writing to help address
this issue for mbtiles (not sure about geopackage).  If your users are
using a fully seeded cache this won't be a big issue.

When you indicate that it takes 2 weeks to download the cache from ArcGIS
do you me that you are using ArcGIS as a WMS source for MapProxy?

Regards



On 8 June 2017 at 00:29, Andrew, David (DPFEM) <
David.Andrew at dpfem.tas.gov.au> wrote:

> Hi all,
>
> Totally a newbie regarding all things GIS
>
> I’m trying to establish which cache type is better for a photo cache.
>
>
>
> I’m looking to cache the orthographic photo maps for the state of Tasmania
> Australia, to a zoom level of 18
>
> This will then be used by the new emergency services application to have
> an offline pre seeded copy.
>
> Around 30 clients, up to 50 in a peak load like New Years eve.
>
>
>
> I cannot seem to find anything that defines which cache style would be
> better or worse.
>
> CouchDB seems interesting and replicatable
>
> Riak seem like very fast fetch
>
> Geopackage looks like we can copy the flat file once we get it.
>
>
>
> If anyone has any numbers around which is better that would be great.
>
> At the moment to download the cache takes a week or 2 for levels 17-18
> from an arcgis server(10.31 newer than the cache option allow)
>
>
>
> Thanks in advance
>
>
>
> *David Andrew*
>
> IT Services – Enterprise Systems
>
> Business and Executive Services
>
>
>
> Department of Police, Fire and Emergency Management
>
> Cnr Argyle and Melville Streets, Hobart TAS 7000
>
> David.Andrew at police.tas.gov.au| www.dpfem.tas.gov.au
>
>
>
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