Appengine – Efficiently delete data with MapReduce
July 22, 2011
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The new method: The new (easier) way is to delete data is the builtin datastore-admin.
The traditional mapreduce method: The mapreduce-technique won’t affect the latency of your application, but be careful with your quotas. You can also filter out entities you don’t want to delete in the clearmodel.process method.
