I'm new to GAE Java backends and I'm unsure how backends relate to the application versions. I have read the GAE documentation and searched a lot and found nothing that would help.
My questions are:
How is the application version running in the backend selected from the deployed versions? Is it selected exactly like in the frontend, i.e. new backend instances use the default version by default?
If it is so, then what does command appcfg backends update [backend]
update exactly? Just the configuration files?
I really think this should be made more clear in the GAE docs.
Thanks.