WAS v8.0 > Migration and coexistence > Distributed operating systems
Run multiple application server versions
We can create an environment in which multiple versions of WAS can run independently on the same system at the same time. A major consideration in coexistence is the avoidance of port conflicts.
Coexisting, as it applies to WAS products, is running a new release of a WAS product on the same machine at the same time as you run an earlier release or running two installations of the same release of a WAS product on the same machine at the same time.
Procedure
Subtopics
Coexistence support
Set up v6.x, v7.0 and v8.0 coexistence
Set up v8.0 coexistence