On Sat, Nov 12, 2011 at 4:48 PM, Chris Shain <[email protected]> wrote:
> All,
>
> I am exploring the possibility of developing a new GeoServer data store
> extension (along the lines of the sql server/oracle/teradata extensions)
> for the Hive distributed database. This would presumably allow me to store
> geo data at very large scale with excellent response time. I am
> particularly interested in storing map overlay features (i.e. individual
> address points with associated data and area overlays, like zip codes,
> states, counties, etc).
>
> I have a few questions:
>
> 1) Does this seem feasible, e.g. are there any obvious roadblocks to this
> or am I unlikely to succeed for some technical reason that I haven't seen
> yet?
>
I guess you need some way to spatially index your data so that you can
respond quickly to bbox queries.
Not knowing much about hive, if it's able to repond to a "like" query fast
you could use geohashing to
turn a spatial entity into a string.
>
> 2) What pieces of plumbing would I need to write? As I mentioned, this
> datastore is non-relational and does not have a formal structured query
> language like SQL, so my assumption is that I likely need to build some
> sort of predicate analyzer/query builder, but I'm OK with that. My main
> question is around the integration points with GeoServer.
>
>
You need to write your own DataStore implementation
> 3) What is the recommended process for deploying/testing/debugging? I
> have read the developer manual, but it seems a little thin
>
DataStores are GeoTools abstractions, you should look into the GeoTools
manuals.
Starting points:
http://docs.geotools.org/stable/tutorials/advanced/datastore.html
and have a look at any ContentDataStore based implementation.
There are various, the jdbc stores, the aggregating store, property data
store ng,
the ogr store, etc, have a look here:
http://svn.osgeo.org/geotools/trunk/
Cheers
Andrea
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Ing. Andrea Aime
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