Since upgrading to app-engine-patch 1.0 you have to run manage.py instead of the dev server. However, I hadn’t bothered to trace down why the –datastore_path=filename.datastore
parameter wasn’t working until today.
For informal parameters, the name and values are not added separately. So you can work around this by dropping the =
between –datastore_path
and –history_path
. Otherwise the datastore is put in /tmp
on OSX and that gets erased when you reboot.