AS/400?

Anonymous wrote in post #55831:

so is the issue of connecting RoR to db2 on iseries going to be
impossible? my workplace is 100% ibm, and i'd love to redo our customer
load-tracking application in rails, but all our data is on as400 db2,
and it's such a massive amount of data that replicating to a separate
standalone db box would be cost-prohibitive.

Here is IBM's formal project on rubyforge for connecting to their
databases including DB2 on IBMi (aka AS400, iSeries, System i, i5)

http://rubyforge.org/projects/rubyibm

AaronBartell.com

Another alternative, if I'm allowed to mention it here, is JRuby..
then you'd just need DB2 JDBC drivers.