Technically it is possible (for example https://stackoverflow.com/questions/145270/calling-c-c-from-python), but I'm pretty sure that you will need to create sort of c++ envelop, shared lib, etc.. It would be easier just to do what you need in c++ instead of python.
Sasha On Fri, May 11, 2018 at 9:37 PM, Patrick Agin <agin.patr...@gmail.com> wrote: > thanks Sasha. And do you know if it's possible to do calls to libosrm > functions directly from Python? > > 2018-05-11 14:33 GMT-04:00 Sasha Khapyorsky <sash...@gmail.com>: >> >> Hi again, Patrick, >> >> On Fri, May 11, 2018 at 9:22 PM, Patrick Agin <agin.patr...@gmail.com> >> wrote: >> > >> > And are you aware of some python code that would do the calls to >> > osrm-routed >> > in parallel threads? >> >> There are lot of examples of how to make python things in parallel >> threads. For example: >> https://stackoverflow.com/questions/2846653/how-to-use-threading-in-python >> >> Sasha >> >> > Regards, >> > Patrick >> > >> > 2018-05-11 14:07 GMT-04:00 Daniel Patterson <dan...@mapbox.com>: >> >> >> >> Patrick, >> >> >> >> There are about a million possible paths you could take here, a lot >> >> of >> >> it will depend on what skills you have available. Off the top of my >> >> head: >> >> >> >> 1) Speed things up by avoiding HTTP overhead and calling the >> >> libosrm.a >> >> functions directly instead of hitting `osrm-routed` over HTTP >> >> 2) Modify the OSRM C++ source code and strip out the parts of the >> >> map-matching response you don't need >> >> 3) Simplify your trace geometries to speed up map-matching >> >> 4) Break your trace list into sets and run these on multiple >> >> machines >> >> in parallel (make copies of the OSRM data onto multiple machines) >> >> 5) Just wait 10 hours, and get a good nights sleep >> >> >> >> libosrm.a is thread-safe, so if you're calling functions from threads >> >> you can do many at once. >> >> >> >> osrm-routed is multi-threaded, so you can run many queries in >> >> parallel - >> >> how many will depend on how many CPUs your machine has. Profiling >> >> multi-threaded server performance is kind of beyond the scope of OSRM >> >> itself, there is lots of literature on it. >> >> >> >> daniel >> >> >> >> On Fri, May 11, 2018 at 10:57 AM, Patrick Agin <agin.patr...@gmail.com> >> >> wrote: >> >>> >> >>> Sorry for the newbie question but what's the difference between >> >>> osrm-routed and libosrm? Is it mandatory to use the latter for a >> >>> parallel >> >>> usage? And do you have an example of code that does the calls in >> >>> parallel >> >>> threads? Thanks Sasha for your help. >> >>> Patrick >> >>> >> >>> 2018-05-11 13:50 GMT-04:00 Sasha Khapyorsky <sash...@gmail.com>: >> >>>> >> >>>> Hi Patrick, >> >>>> >> >>>> If you are using libosrm (which reported to be thread safe: >> >>>> https://github.com/Project-OSRM/osrm-backend/issues/4966) you can >> >>>> just >> >>>> split your list and run its parts in different parallel threads. >> >>>> >> >>>> Sasha >> >>>> >> >>>> On Fri, May 11, 2018 at 8:14 PM, Patrick Agin >> >>>> <agin.patr...@gmail.com> >> >>>> wrote: >> >>>> > Hi, >> >>>> > I want to call the map matching service for nearly a million of >> >>>> > routes. I >> >>>> > calculated that the task could take 10 hours on my laptop to >> >>>> > complete. >> >>>> > I was >> >>>> > wondering if there's someone who faced the same problem and who >> >>>> > addressed it >> >>>> > in parallel, maybe with Spark? Another tool or way? >> >>>> > Any hint is greatly appreciated! >> >>>> > Patrick >> >>>> > >> >>>> > _______________________________________________ >> >>>> > OSRM-talk mailing list >> >>>> > OSRM-talk@openstreetmap.org >> >>>> > https://lists.openstreetmap.org/listinfo/osrm-talk >> >>>> > >> >>>> >> >>>> _______________________________________________ >> >>>> OSRM-talk mailing list >> >>>> OSRM-talk@openstreetmap.org >> >>>> https://lists.openstreetmap.org/listinfo/osrm-talk >> >>> >> >>> >> >>> >> >>> _______________________________________________ >> >>> OSRM-talk mailing list >> >>> OSRM-talk@openstreetmap.org >> >>> https://lists.openstreetmap.org/listinfo/osrm-talk >> >>> >> >> >> >> >> >> _______________________________________________ >> >> OSRM-talk mailing list >> >> OSRM-talk@openstreetmap.org >> >> https://lists.openstreetmap.org/listinfo/osrm-talk >> >> >> > >> > >> > _______________________________________________ >> > OSRM-talk mailing list >> > OSRM-talk@openstreetmap.org >> > https://lists.openstreetmap.org/listinfo/osrm-talk >> > >> >> _______________________________________________ >> OSRM-talk mailing list >> OSRM-talk@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/osrm-talk > > > > _______________________________________________ > OSRM-talk mailing list > OSRM-talk@openstreetmap.org > https://lists.openstreetmap.org/listinfo/osrm-talk > _______________________________________________ OSRM-talk mailing list OSRM-talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/osrm-talk
