Proxy datasources are not supported on z/OS.
The ProxyDSAccountSample is a sample to show how the Container-Managed Persistence (CMP) Enterprise JavaBeans (EJB) multiple datasource support features can be used with the partitioning facility. The CMP EJBs in this application use two datasources to connect to two different databases, while the standard CMP EJBs can only use one datasource.