Using two boxes to share the load via ddm files

Hi group,

        Two iSeries (or whatever) boxes hooked together with gigabit
ethernet.  Box A accessing Box B through ddm for certain DB file access -
both random and sequential.  What are the considerations in regard to
performance?  I have never experienced ddm before and have no idea how this
will perform.  Does anybody have any real-world experience they would be
willing to relate?  Can I expect this to perform up near the abilities of
both machines?  

        I am probably not asking this very well.  I have read some of the
documentation and understand roughly how it works.  There seems to be two
ways to connect?  Sna and Tcpip?  Which is fastest?  How big is the hit on
the 'Target' machine for data access?  I'm just trying to get a feel for how
this sort of thing would work and I know that the final answer has to be
'That depends' but I would appreciate any information, anecdotal or
otherwise anyone might be willing to share.


Thanks

Rick DuVall
Systems Manager
Dealer's Auto Auction of Okc
1028 S. Portland
Oklahoma City, OK 73108
(405) 947-2886
rick@xxxxxxxxxx 
http://www.nothingisreal.com/dfki/no-word