If you are looking for an easy Import/Export..the answer is NOT POSSIBLE.
You should be able to use DZ backup & restore Feature to transfer a COMPLETE Server. But this "resets" the targetserver to the state of sourceserver.
So far I didn't find any way to transfer selected content like KPI-,Dashboard-,Datasource-Definitions :(
KPI- and Datasource Definitions
you need to create them manually on server2 via "Control Panel".
Published Dashboards
As soon as your dashboard uses a external datasource (a datasource configured on DZ-Server) it's not possible anymore to publish to another HUB or to another Server. (BTW: You also can't spread datasources and dasboard accross HUBs)
Exceptions:
If you have a Dashboard without ANY external data you can transfer between Servers using the Publisher Client:
- Browse on Server1 the Dasboard1
- Select "Create from existing"
- Select "Publish" and publish to Server2 as Dashboard1