Hi David,

accordingly with
http://code.google.com/appengine/docs/python/datastore/keysandentitygroups.html#Entity_Groups_Ancestors_and_Paths
"An entity without a parent is a root entity"...

so you don't need to associate each note to a parent...

I'm wondering... when you got these contention errors, were you
assiging a parent to the notes (entity groups) ? if that is the case,
then you were using a single entity group !

On Jan 27, 12:03 am, iDavid <idavidst...@gmail.com> wrote:
> After watching Brett's video, the answer became 
> clear.http://sites.google.com/site/io/building-scalable-web-applications-wi...
>
> Create a group entity for each device.  Then all device's can
> have their notes inserted in parallel.
>
> I will give this a try and report back.
>
> -David Story
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