Using namespace

[aswath]

Hello,

Java mapreduce recently added namespace support.  I could not get an example or more documentation on using this feature.  

How do I use the namespace in the mapreduce. 

-Aswath

[Arie Ozarov]

Just provide the desired namespace to DatastoreInput constructor. (e.g. new DatastoreInput("kind1", SHARD_COUNT, "namespace1"))

[Aswath Narayana]

Hi, 

Can I provide a list of namespaces?

What if I have to run the mapreduce job for 1000+ namespaces.

-Aswath

Regards,

Aswath

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On Tue, Apr 29, 2014 at 12:40 AM, Arie Ozarov <oza...@google.com> wrote:

Just provide the desired namespace to DatastoreInput constructor. (e.g. new DatastoreInput("kind1", SHARD_COUNT, "namespace1"))

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[Arie Ozarov]

No, you can only provide one namespace. The Datastore does not provide a way to use one query for multiple namespaces.

You could create many MR jobs (one for each namespace) and tie them together using a parent pipeline.

Feel free to create a feature request @ https://code.google.com/p/appengine-mapreduce/issues/ 

Arie.