On Tue, Jun 24, 2014 at 10:29 PM, Yasha Karant <[log in to unmask]> wrote: > I was not referring to the Fedora mechanism. Some licensed-for-fee > commercial unix environments (not linux) used on primary servers allow for > major release upgrade in place. > Does the Red Hat method that is mentioned by Red Hat allow for this, or is > the Red Hat enterprise z-stream "insane" to use in a production situation? > > If it is not insane but actually is effective, are there no Linux or GPL > encumbrances on z-stream that "force" Red Hat to release the source? Please see this documentation: https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Migration_Planning_Guide/chap-Red_Hat_Enterprise_Linux-Migration_Planning_Guide-Upgrade_Tools.html But it is supported only in some use cases. The details are summarized here: https://access.redhat.com/site/solutions/799813 (this one needs subscription to read) Akemi