shared appltop and stand alone appltop mixed config for ebs 12.2.9+

Hi All,

Is it possible to configure two internal apps nodes with shared appltop via nfs (internal local lan) and one stand alone dmz app node with no shared appltop ? we have a iPortal server needs to be in DMZ per Oracle recommendation. We do not want to open nfs port with shared appltop for this dmz server.

If yes, here is more questions,

1) how s_shared_file_system and s_atName should be for each $CONTEXT_FILE ?

2) how to run adop cycles with such configuration ? with allnodes=no on each node ? or just with stand alone dmz server using allnodes=no