When starting with any new major library or system, I go to StackOverflow for the “What should I know?” questions. The answers might be subjective, but the advice usually saves me many hours of trouble. So far, I have burned a number of hours on Google App Engine tripping over the same issues that more experienced developers here already know.
I eventually found these common issues:
- appcfg.py uploads do not appear on
the Google Dashboard until you select
them from the Versions tag.
- Using cron jobs for keeping an application from being unserved is
necessary if you want consistent response time. This gets to be a “tragedy of the commons issue” (Thanks Nick).
- PyDev in Eclipse works well with Google App Engine.
- Getting a local version of Python 2.5 for Ubuntu 10.04 is hard. Or you can “sudo add-apt-repository ppa:fkrull/deadsnakes” to get it.
- Use VirtualEnvWrapper to isolate your Python2.5 for GAE from other versions of Python used for everything else.
- Applications on appspot only switch to newly updated versions when inconvenient, regardless of what the control panel says. You should keep a version number in the title or footer to avoid wild goose-chases.
So, what else should I know?