[postgis-users] PostGIS over distributed worksites

rox rox at tara-lu.com
Sun Mar 6 20:50:30 PST 2016

I'm not sure what portions / parts of your db are shared or vary on a 
per seat basis, and this isn't my normal area of mucking... but I'll 
throw some ideas out and let other people improve them :)

What if you set up a master database - perhaps AWS.  Set each 
distributed seat to replicate down.  Updates are pushed to the master by 
someone, and each distributed seat is auto-updated.

What won't work with a pure replicated server instance.. is local 
changes, if you have them.... and so again - not my area of playing, but 
what about two local databases?  One local for changes, and a second 
that is pure replication.
That complicates your connection configuration and potentially your tool 

Otherwise, as I understand it, barman can create a backup of one 
instance and restore the full working database to another site - so you 
could create a shared barman replication service where individual seats 
could recover a master DB when updates are required.

just some thoughts to stir the discussion.


On 3/6/2016 7:21 PM, Lee Hachadoorian wrote:
> I usually use PostGIS in a localhost or a LAN setting, where I or my 
> workgroup can all be connected to the database all the time.
> I recently set up a QGIS project using SpatiaLite with Dropbox 
> syncing, because project participants were at multiple worksites. 
> However, rendering--particularly rendering of QueryLayers--is quite 
> slow, and QGIS often crashes. Testing shows that QGIS is much more 
> responsive with PostGIS as the back end, and although it's difficult 
> to prove a negative, it seems that QGIS crashes don't happen (or at 
> least clearly happen less often). So I would like to transition the 
> project to PostGIS.
> I am asking for your recommendations or experiences with setting this 
> up in a way that will be fairly easy to show users who are technically 
> savvy but new to database management. Some details:
> 1. Small workgroup (5 or so).
> 2. Spatial layers are big releases from city government (parcels, 
> streets, infrastructure) which are updated at most a couple of times a 
> year, often less frequently. Each spatial layer is updated on a 
> different schedule by different agencies.
> 3. Data releases are in shapefile (blecch!).
> 4. Users do meet in person with some regularity.
> As a suggestion, I am considering just having everyone set up 
> localhost installs of PostGIS. When there is a new data release, one 
> person could load and clean the data, then dump the table, copy the 
> dump to Dropbox, and other users could load the new table in their 
> localhost database.
> Obviously this solution is not scalable--more users or more frequent 
> updates would make it quite tedious--but it may work for this use 
> case. I am open to criticisms and suggestions.
> Thanks,
> --Lee

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