I am doing the exact same think you are mentioning, only I use google
spreadsheet to fetch the data.

some pointers:
use low level.
make sure you don't make many writes to the same entity group.
make parallel writes for different entity groups to speed things up.
have a retry mechanism for failed writes


On Jul 11, 12:30 am, jd <jdpatter...@gmail.com> wrote:
> On Jul 11, 4:23 am, John Patterson <jdpatter...@gmail.com> wrote:
>
> > It is about the same speed.  I've just uploaded 500,000 entities in  
> > The new Mapping API sounds like the ideal solution but it is python  
> > only at the moment.  
>
> Oops no it is also available for Java now!
>
> http://code.google.com/p/appengine-mapreduce/

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