z15 T02 / LinuxONE III LT2
On April 14th IBM announced the new z15 T02 the successor for the z14 ZR1. At the same time also the LinuxONE III LT2 the successor for the LinuxONE Rockhopper II was announced. Both machines are based on … Read the rest
Red Hat Enterprise Linux (RHEL) 8.2 released
On April 21st, 2020 Red Hat announced RHEL 8.2 the second service pack for their new enterprise version. With the transition of RHEL 7.8 to Maintenance Mode 2 this is now the premier enterprise distribution.
The kernel level for 8.2 … Read the rest
Red Hat Enterprise Linux (RHEL) 7.8 released
On March 31th, 2020 Red Hat announced RHEL 7.8 the next regular update to their flag ship operating system. This the successor of RHEL 7.7. With this release in August RHEL 7 transitions to Maintenance Support 2 phase. So … Read the rest
zlib acceleration
With the z15 the CPU in System Z has gotten the ability to compress data into the zlib format really fast. The feature is officially called Integrated Accelerator for zEnterprise Data Compression (zEDC). This is know as zlib acceleration. Of … Read the rest
SUSE Linux Enterprise Server 12 SP5 (SLES12 SP5) released
On December 9th 2019, SUSE announced SLES12 SP5 the follow up service pack after SLES 12 SP4. This release is the last service pack of SLES12. The new features for System Z include:
- First z15 support in compiler, binutils
Secure Boot / Secure IPL
The new IBM z15 / LinuxONE Emperor III introduced the possibility for an operating system to boot in a secure fashion. The chain of trust is verified from the hardware throughout the whole firmware up into the operating system. Right … Read the rest
Red Hat Enterprise Linux (RHEL) 8.1 released
On November 6th, 2019 Red Hat announced RHEL 8.1 the first service pack for their new enterprise version.
The kernel level for 8.1 is kernel-4.18.0-147.el8. This is a bug fix and feature release. On System Z RHEL 8.1 is better … Read the rest
z15
Today September 12th 2019 IBM announced the new generation of mainframe called IBM z15. Planned availability date is September 23, 2019. And of course they also announced LinuxONE III. Like the z14 ZR1 this machine now also fits into a … Read the rest
Red Hat Enterprise Linux (RHEL) 7.7 released
On August 6th, 2019 Red Hat announced RHEL 7.7 the next regular update to their flag ship operating system. This the successor of RHEL 7.6.
The kernel level for 7.7 is kernel-3.10.0-1062.el7. Please note that the kernel-alt and the … Read the rest
Hypervisor monitoring with hyptop
System Z is designed to efficiently run multiple different workloads at the same time. From Linux you can with proper authorization monitor the other LPARs. The tool for this is hyptop.
Hyptop is documented in the man page (“man … Read the rest