There were discussions about this a while back and there is an open JIRA - [ISPN-871] Out-of-heap data container implementation - JBoss Issue Tracker
It would be helpful if someone from the ISPN team could provide an update on this. I'm pretty interested in this as well.
yes, I've had other more important tasks to work on, so this has been set aside for a while. However I have made some progress and I hope to have something to show relatively soon.
Other things worth mentioning in this context:
Thanks for the update and good to hear that there is some progress in this space. I look forward to it.
Yes, Shenandoah is something very exciting, nice to know that Infinispan is being tested against it.