[GraphHopper] New version 0.2 questions

[Peter K]

Hi Max,

the settings in config.properties is obviously only for the creation of
the graph. As on Android you only have 32MB ...

If you look in the Android code you see the call graphhopper.forMobile()
which calls setMemoryMapped() which is equivalent to MMAP_STORE in the
config.properties

BTW: MMAP_STORE_SYNC is a bit slower and only necessary if you want to
use the MMAP option for the server to guarantee read-thread safety

> Maybe I need to increase memory JVM with*/-Xmx../. *option for pass
the lack of memory heap at graph generation step ?

If you increase it it should work. e.g. via

export JAVA_OPTS="-Xmx..."; ./graphhopper.sh ...


Regards,
Peter.


> Hello,
>
> I tested the new version 0.2 on my Android device.
> So I was forced to generate new graph because of the new version of
> node (V2)
>
> I want to understand the difference between the two following option
> in config file:
>
> */# graph.dataaccess=MMAP_STORE_SYNC/*
> */graph.dataaccess=RAM_STORE/*
>
> I tested to generate /France/ graph (which is big) with
> */graph.dataaccess=RAM_STORE/* but the process stoped because of lack
> of memory heap...
>
> So i change this property to */graph.dataaccess=MMAP_STORE_SYNC/* and
> the process finished correctly and the graph works and my Android
> device. The time for generate was approximatly 50minutes (I7 dual core
> and SSD) for information.
>
> So I want to know if this option only impact graph generation and not
> impact runtime execution?
> If there is runtime impact (speed or something else) can I
> use /graph.dataaccess=RAM_STORE /for android with big graph like the
> one for France?
> /
> /
> Maybe I need to increase memory JVM with*/-Xmx../. *option for pass
> the lack of memory heap at graph generation step ?
>
> Otherwise good Job, GPS exact routing is perffect :)
> Waiting for perfect thing with turn restriction ;)
>
> Regards.
>
> Max
>
>
>
>
>
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