[mapserver-users] Best integration with dynamic map information

[Ahmed Aboulenein]

I got your point, will definitely dig into the MapCache. Thank you so much
for being so helpful, all the best!

- Ahmed

On Tue, Mar 17, 2015 at 10:41 PM, Lime, Steve D (MNIT) <
Steve.Lime at state.mn.us> wrote:

>  MapCache would be a **much** better option than using MapServer in tile
> mode. You still need something to render tiles (e.g. MapServer) but
> MapCache manages the tiles and is the interface between your client
> application and the tiled data. The brute force method would be replace the
> data and then blow away the cache and let MapCache (and MapServer) rebuild
> as users request tiles. The first request will result in MapCache making a
> call to MapServer to generate the tile/metatile, but subsequent requests
> for tiles will use the cached tiles.
>
>
>
> Others on the list may well have more experience and better ideas.
>
>
>
> Steve
>
>
>
> *From:* Ahmed Aboulenein [mailto:aboulenein.ahmed at gmail.com]
> *Sent:* Tuesday, March 17, 2015 2:54 PM
> *To:* Lime, Steve D (MNIT)
> *Cc:* mapserver-users at lists.osgeo.org
> *Subject:* Re: [mapserver-users] Best integration with dynamic map
> information
>
>
>
> Hi Steve,
>
> Thank you so much for the informative reply, much appreciated!
>
> It's actually a new dataset copy every 5 minutes, it seems like replacing
> a shape file would be most efficient.
>
> We are not using MapCache, do you think it would be a good option for our
> use case with this frequent updates?
>
> Thanks again, Steve!
>
> Best regards,
>
> Ahmed
>
>
>
> On Tue, Mar 17, 2015 at 8:03 PM, Lime, Steve D (MNIT) <
> Steve.Lime at state.mn.us> wrote:
>
> I’ll let others weigh in on throughput. Seems like that should be a matter
> of resources and how much hardware you can throw at the problem. Are you
> using MapCache to serve tiles? MapServer itself is good for rendering tiles
> or more likely, metatiles.
>
>
>
> On thread safety MapServer itself isn’t doing any file locking. Presumably
> the OS or database is handling contention issues. I’d think the right way
> to go for data storage depends on your update process itself. If you want
> to incrementally tweak lines as new information becomes available then a
> database backend seems more reasonable – I’d think you could detect change
> easier and perhaps only retile very specific areas as a result. If instead
> you’re getting a new copy of your entire dataset every 5 minutes then
> perhaps a shapefile would work best – just replace the file and trigger
> retiling.
>
>
>
> Steve
>
>
>
> *From:* mapserver-users-bounces at lists.osgeo.org [mailto:
> mapserver-users-bounces at lists.osgeo.org] *On Behalf Of *Ahmed Aboulenein
> *Sent:* Tuesday, March 17, 2015 9:19 AM
> *To:* mapserver-users at lists.osgeo.org
> *Subject:* [mapserver-users] Best integration with dynamic map information
>
>
>
> Hi ALL,
>
> We serve traffic lines that gets updated every 5 minutes from our feeds.
> We would like to use Map Server to generate transparent tiles showing
> colored polylines of the traffic.
>
> I am newbie to Map Server, I got the server and workshop running and also
> I think I have some good understanding of the map file and layers concept.
> I have a question about integrating our traffic information as a data
> source to the MapServer.
>
> Important aspects for us:
>
> 1. Performance: since we are updating large areas every 5 minutes. We will
> need throughput like 10K images per second. Does this sound okay?
>
> 2. Threads safety: my concern what happens if while updating the source,
> the MapServer is actually rendering an image from old data. Any locks?
>
> I understand our options are:
>
> 1. Data files: such as shape files or KML files.
>
> 2. Database: PostGIS for example.
>
> 3. Service that pulls data: WMS server - I didn't dig much here.
>
> Thanks in advance for your help, some pointers or information to go
> further.
>
> Best regards,
>
> Ahmed
>
>
>
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