This project is an example of how protobuf forward and backward compatibility works. 
The following is the example script script.
Check out my blog for more info at http://www.eishay.com

import voldemort._
import test.UserPBO._
val vclient = new VClient[String, User] ("proto-store", "tcp://localhost:6666")
val user = User.newBuilder.setId(1).setName("Joe Smith").addEmail("joe@gmail.com").addEmail("joe2@yahoo.com").build
vclient put (user getId toString, user)
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do remote...
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val user2 = vclient get "1"
 
 
remote:
import voldemort._
import test.UserPBO._
val vclient = new VClient[String, User] ("proto-store", "tcp://localhost:6666")
val user = vclient get "1"
val newUser = User.newBuilder(user).setMembership(Membership.newBuilder.setActive(true).setType(Membership.Type.PRO).build).build
vclient put (newUser.getId.toString, newUser)      


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By Eishay Smith
eishay@gmail.com
http://www.eishay.com