App engine bulk loader download warning “No descending index on __key__, performing serial download”

Question

I\'m using the following to download all instances of one of my kinds:

appcfg.py download_data --config_file=bulkloader.yaml --kind=ModelName --filename=Mode         


        

Answer 1

If your using JAVA and the datastore-indexes.xml file.

Add this (Assuming the name of the kind is "Books") to the datastore-indexes.xml file:

Then redeploy your app. Ensure you check the datastore index tab to see that the __key__ is serving. Then you can try your download again.