[GraphHopper] what is the use case of SynchedDAWrapper?

[Peter]

Hi,

this is for two reasons:
 first, it allows you to use the MMap for server side
 second, it allows us to use multi-threaded algorithms at some point in
the future

Regards,
Peter

On 01.07.2015 02:31, John Zhao wrote:
> Hi Peter,
>
> This question is for you. :)
>
> I guess MMapDataAccess is mainly designed for running Graphhopper on
> Android device, which you can't load all the data into the limited memory.
>
> In the comment of MMapDataAccess:
> This is a data structure which uses the operating system to
> synchronize between disc and memory.
> Use SynchDAWrapper if you intent to use this from multiple threads!
>
> why GH need a thread-safe one, somebody want to do the extract on
> Android device?
> just curious.
>
> Thanks in advance.
>
> *Best Regards,*
> *ZhiQiang ZHAO*
>
>
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