DB2 Version 9.7 for Linux, UNIX, and Windows

Instances and DB2 Administration Server can be created in a shared DB2 copy (Linux and UNIX)

Starting in Version 9.7, you can create instances and a DB2® Administration Server (DAS) in a shared DB2 copy on an AIX® system workload partitions, a Network File System shared server, or on Solaris Zones.

The following shared systems are supported:
AIX system workload partitions (WPARs)
A DB2 copy is installed on the global environment and shared on system WPARs with read-only permission. For AIX WPAR, fix pack updates are also supported.
Network File System (NFS) shared server
A DB2 copy is installed on NFS server and shared (normally with read-only permission) on NFS clients.
Solaris Zones
A DB2 copy is installed on global zone on Solaris and shared on other zones with read-only permission.