cloud portability

may i know how portability is gae application. let say i have an application that usi开发者_JAVA技巧ng comet feature, task queue..etc and not using bigtable and i want to deploy on vmware/amazon will it run?

No. Google App Engine and Amazon Cloud Services have different APIs.

Many of the concepts are similar; it would certainly be possible to port many applications between the two and achieve similar functionality - but you'd have to modify a lot of code. If you have a lot of data stored in one system, you'd have to write custom code to export it from that system and import it into the other, too.

AppScale is designed for this kind of portability.

AppScale is a platform that allows users to deploy and host their own Google App Engine applications. It executes automatically over Amazon EC2 and Eucalyptus as well as Xen and KVM. It has been developed and is maintained by the RACELab at UC Santa Barbara. It supports both the python and java Google App Engine platforms.

Can't say for sure if it's something that will work for you but it's probably worth looking into.