Linux performance guides for distributions

I'm often asked for the performance guides from Red Hat and SUSE. So here are the links for that: RHEL 6 Performance Tuning Guide SLES 1...Read more »

IBM XL C/C++ for Linux on System z beta program

IBM has launched a beta program for a new compiler for Linux on System z. If you've been working with IBM platforms you may already kno...Read more »

Fedora 20 for IBM System z released

The new Fedora 20 for System z / s390x was released 1/8/2014. Thanks to the Fedora team keeping the distribution going! The download is av...Read more »

Oprofile on zLinux - how to setup and use

(updated 1/8/2014) Oprofile is a system wide profiler which is available in all major distributions for Linux on System z. Here is the setu...Read more »

Installation of Linux on System z

Now and then I get the question on documentation for the base installation of Linux on System z. As this depends on the distribution, take a...Read more »

Red Hat Enterprise Linux 6.5 released

Nine months after the last release Red Hat has announced the availability of RHEL 6.5. The kernel level is now kernel-2.6.32-431.el6, for t...Read more »

Red Hat Enterprise Linux 5.10 released

Red Hat has announced the availability of RHEL 5.10. You can find more information on this here: Announcement Release Notes Technical Notes ...Read more »

zBC12

On July 23rd IBM has announced the new business class model of the mainframe the zBC12 . This is the successor to the z114 and is as you pr...Read more »

Fedora 19 for IBM System z released

The new Fedora 19 release for System z / s390x happened today. Congratulations to the team! The download is available from the Fedoraproje...Read more »

How to determine which kernel level corresponds to which service release for RHEL and SLES

Now and then I get the question - where to find the kernel level or version for a specific service release. And vice versa - I have kernel l...Read more »

Cheat sheet for lock debugging in the Linux kernel

From time to time I'm getting a performance problems that requires identifying the lock in the Linux kernel that causes too much lock co...Read more »

zlib performance improvements

In my blog entry on RHEL 6.4 I've mentioned that there have been performance enhancements for zlib compression. However I never got aro...Read more »

New white paper: HyperPAV setup with z/VM and Red Hat Linux on zSeries

Parallel Access Volume (PAV)  allow you on System z to have more than one I/O outstanding per volume. However it's not so easy to set up...Read more »

Red Hat Enterprise Linux 6.4 released

Red Hat has announced the availability of RHEL 6.4. The kernel level is now kernel-2.6.32-358.el6, for the main bug fixes see the kernel up...Read more »

Oracle 11 now certified for RHEL 6 on System z

After a long period of testing last week Oracle finally certified Oracle DB 11gR2 (11.2.0.3) running on RHEL 6.2 and later releases. For det...Read more »

Fedora 18 for IBM System z released

The Fedora release 18 for System z is here . And this time Dan Horák and the team did a great job as this happened only 8 days after the Int...Read more »

Red Hat Enterprise Linux 5.9 released

Red Hat has announced the availability of RHEL 5.9. You can find more information on this here: Announcement Release Notes Technical Notes K...Read more »

zEC12 Linux certifications and tested platforms

IBM has announced a new mainframe the zEnterprise EC12 . This systems supports all the Linux versions, that are currently supported by IBM, ...Read more »

RHEL with the Trinity Desktop Environment (TDE)

TDE is the unofficial continuation of the KDE 3 project by a new team or as they put it a desktop environment for Unix-like operating system...Read more »

New Whitepaper "Using the Linux cpuplugd Daemon to manage CPU and memory resources from z/VM Linux guests"

CPU and memory resources are normally shared in a virtualized environment. Therefore multiple guests are fighting for the same resources. Be...Read more »