Hello,
I have an multi-tenant app-id, and I have designed on partitioning the
entities based on  url parameters.  I am not using the namespace yet.

For example,

Tenant {
@Id name+email;
}

class Party {
  @Long id
  Key<Tenant> tenantKey;  // partitioning/filtering
  String fname
}

Now, I am planning to use the NamespaceManager for the Party entities.  I
want to use the mapreduce and apply the namespace on the existing Party
entities.
Can a namespace be changed from empty to certain value on the existing
entity.

-Aswath
http://vs-accounting.appspot.com

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