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Re:How to properly increment a counter on Google App Engine by DocSavage on Tuesday September 22, 2009 @07:08PM (#838204)
I would suggest looking at this implementation: http://appengine-cookbook.appspot.com/recipe/high-concurrenc...

My current counter system uses a single datastore entity per counter and uses the new CapabilitySet API to check if memcache will go offline in near future.

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