Red Hat Enterprise Linux (RHEL) 7.5 released

Red Hat Enterprise Linux (RHEL) 7.4 released

Red Hat Enterprise Linux (RHEL) 6.9 released

Red Hat Enterprise Linux (RHEL) 7.3 released

On November 3rd 2016 Red Hat released the next regular update to their flag ship operating system.

The kernel level for 7.3 is kernel-3.10.0-514.el7.

Here is my usual summary of links to more information:

• Complete RHEL 7 documentation
• RHEL 7.3 release notes
• RHEL 7.3 known issues
• RHEL 7.3 kernel CVE and bugfix documentation
• RHEL 7 installation guide
• RHEL 7 installation guide for z
• RHEL 7 performance tuning guide
• IBM documentation on developerworks (7.2 version)
• RHEL limits
• RHEL lifecycle with the end date for the Extended Update Service (EUS)
• RHEL7 package list

From a Linux on z Systems perspective the major enhancements are in the tool chain. The compiler can now can exploit the SIMD instructions of z13.

Also in September Red Hat achieved EAL4+ / common criteria certification for RHEL 7.1:

• Red Hat press release
• Red Hat certification overview
• BSI certification report  

 (updated 4/11/2016)

Red Hat Enterprise Linux 6.8 released

On May 11 2016 Red Hat has announced the availability of RHEL 6.8. This marks the transition into what in Red Hat's product life cyle is called production phase 2. The kernel level is now kernel-2.6.32-642.el6, for the main bug fixes see the kernel update description.

As usual there are the release notes and the technical notes in two separate documents. The complete documentation can be reached from the Red Hat documentation page (you need to select "6" on the left bar).

The IBM documentation for RHEL 6.4 on developerworks still applies for this release.

From a technical perspective the most important part are the z13 performance patches, which will make certain workloads run faster than on previous releases.

z13s

IBM announced the new version of the business class  mainframe called z13s.  This is the successor to the zBC12. You can find the detailed announcement letter here.

z13s glas model - photo Michael Storzer

From a Linux perspective the IBM tested platforms has been updated to include z13s. SUSE has published the certifications:

• SUSE certifications: SLES11 SP3, SLES12
• Red Hat certifications: RHEL6, RHEL7

Also announced are

• z13 enhancements (see announcement letter) including a new administrative mode for Linux called IBM Dynamic Partition Manager (DPM)
• KVM for IBM z Systems V1.1.1 with a planned availability of 3/18/2016, see my separate post.
• z/VM PTFs for exploitation APARs  (see announcement letter) providing e.g. also SIMD support for guest exploitation (VM65733)
• z/VM 6.4 preview announcement

Useful links:

• IBM Redbooks:
• IBM z13 and z13s Technical Introduction, SG24-8250-01 
• IBM z13 Technical Guide, SG24-8251-01
• IBM z13s Technical Guide, SG24-8294-01 
• z13s FAQ
• 3D demonstration of the system (you can interact, open doors, get explanations etc)
• Large Systems Performance Reference for IBM z Systems updated with z13s data
• Common Criteria Certification at EAL5+ level for LPAR

(updated 10/21/2016)

Red Hat Enterprise Linux (RHEL) 7.2 released

On November 19th 2015 Red Hat released the next regular update to their flag ship operating system.

The kernel level for 7.2 is kernel-3.10.0-327.el7. The number of technology previews for System z has been greatly reduced, successful testing allows now support for those features.

Here is my usual summary of links to more information:

• Complete RHEL 7 documentation
• RHEL 7.2 release notes
• RHEL 7.2 known issues
• RHEL 7.2 kernel CVE and bugfix documentation
• RHEL 7 installation guide
• RHEL 7 installation guide for z
• RHEL 7 performance tuning guide
• IBM documentation on developerworks
• RHEL limits
• RHEL lifecycle with the end date for the Extended Update Service (EUS)
• RHEL7 package list (now updated to include 7.2)

From a Linux on z Systems perspective this is a major step. This is the first distribution that supports SMT2 natively.So if you install it, you will have twice as many logical CPUs.

And this is the first Red Hat distribution that supports the High Availability and Resilient Storage Add-Ons. So far some restrictions apply, but they hopefully can be lifted in later releases.

(updated 4/26/2016)