[olifante]

I don't know, I haven't had to do transactions. Another advantage of the web2py DAL is that it doesn't have any dependencies. It's just a single file which could be used by any other web framework to decouple from BigTable and enhance portability. An Argentinian developer shows how easy it is to use the web2py DAL with Bottle:

http://martin.tecnodoc.com.ar/default/post/2011/05/25/21_bot...

[moreyes]

It should be added to the documentation which datastore features it doesn't support, to warn users and avoid that the GAE support is misinterpreted as bad advertisement.