upgrading from 09-04 to 16

[ofbiz12345]

We are looking into upgrading ofbiz 09-04 to 16. Any thoughts on if this even a good idea?

We need it to work with java 7 at a minimum... perhaps there is a lower version we should be aiming for?

We are looking here... but the task seems daunting... what gotchas should we be aware of.

https://cwiki.apache.org/confluence/display/OFBIZ/Revisions+Requiring+Data+Migration+-+upgrade+ofbiz

additionally, this will be going into the amazon cloud... anyone have experience putting ofbiz into the AWS cloud and pitfalls with this?

what version of linux, java, database jars work the best?

thx

[ofbiz12345]

I have been reading the upgrade instructions:
https://cwiki.apache.org/confluence/display/OFBIZ/Revisions+Requiring+Data+Migration+-+upgrade+ofbiz
If the pattern described there is used then end-users will simply have to update OFBiz, run it on a server that is not publicly accessible, let OFBiz do the automatic database table changes (ie add tables and columns for new entities and fields), and then run the series of services described here between the revision they were using, and the revision they are updating to.

Locally, when i get the 12.04 source code check out... i see tons of differences in the code between 12.04 and 09.04 in java and other server files they share.

what is the easieast way to update my old 09-04 without having to manually diff every file and see what is missing from 12-04... svn up noted above seems not to work because we keep our source code seperate from the server code... and use ant to copy it to server code.

So upgrading seems like it will be somewhat painstaking?

Has anyone else encountered this?

This person seems to have encountered something similar per their upgrade to 12-04
http://ofbiz.135035.n4.nabble.com/Bringing-up-version-12-04-td4641321.html#a4641393