On 24.05.2018 06:59, Timothy Sipples wrote: > Russ Herrold wrote: >> It may turn out that we (ClefOS) need to fork and offer two >> variants > > I guess I'd call them "streams" rather than "forks." > > For what it's worth, Red Hat seems to offer at least 3 major streams now: > Fedora (their "community" release), RHEL Structure A, and RHEL. The RHEL > Structure A/RHEL pair of streams is a unique offering for the s390x > architecture branch, at least for now. (Is it a one-time aberration or the > start of something new? I have no idea, so ask Red Hat, I guess.) In RHEL > 7.5, Red Hat decided to offer kernel 3.10 (only) for all POWER processors > prior to POWER9, and (only) kernel 4.14 for POWER9. For X86-64 it's only > 3.10, and for ARM64 it's only 4.14. > > There are certain newer capabilities that RHEL 7.5 doesn't support on s390x > that RHEL 7.5 Structure A does. Red Hat's release notes explain all that. > But it's possible to mix RHEL and RHEL Structure A instances on the same > machine and in a Red Hat supported way. (And, for that matter, other > supported RHEL releases.) > Specifically, RHEL Structure A is required to run KVM guests on IBM Z. Guests can be either RHEL and RHEL Structure A. Another thing to keep in mind is that the s390utils-* releases are different. For RHEL it's 1.23.0 and for RHEL Structure A it's 2.1.0. > It looks like the minimum RHEL 7.5/RHEL 7.5 Structure A machine model > requirement hasn't changed since RHEL 7.4, so it's z196/z114 processors or > higher, which includes all LinuxONE machines. > > I don't have a strong view on the "right" approach for Linux release > streams. It really depends on end users and what they prefer, and they > might choose particular Linux distributors based on their different > release/service stream approaches. There are some important principles, > though. I'd say that maintaining security currency is quite important, as a > notable example. But that'll likely mean not waiting too long to exploit > new system features since many of those new features are often > security-related. > > -------------------------------------------------------------------------------------------------------- > Timothy Sipples > IT Architect Executive, Industry Solutions, IBM Z & LinuxONE, > Multi-Geography > E-Mail: [email protected] > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ >
-- Regards, Viktor Mihajlovski ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
