February 19, 2015

Problem with the latest crypto device driver updates on RHEL 6.6 / SLES 11.3 on older hardware

With the introduction of the code for more crypto domains into the service streams of RHEL 6.6 and SLES 11.3 an unfortunate regression has been introduced. The crypto card support for z196 / z114 and older machines is no longer working with the new code.

IBM has published a description and a workaround - for a kernel patch you need to contact your service provider.

January 26, 2015

Fedora 21 for IBM System z released

The new Fedora 21 for System z / s390x was released 12/18/2014. Thanks to the Fedora team for this time adding additional packages! 

The download is available from the Fedoraproject site and the respective mirrors and known issues  are covered in the wiki.

November 14, 2014

New Whitepaper "IBM Cognos Business Intelligence 10.2.1 for Linux on System z - Performance and z/VM Resource Management"

IBM Cognos Business Intelligence is an interesting workload for zLinux environments. This new whitepaper covers setup and some of the performance and tuning aspects for this in a zLinux / z/VM environment.
As an add on it also takes a look at the z/VM resource manager (VMRM) for helping to distribute the CPU capacity between competing workloads.

October 15, 2014

Red Hat Enterprise Linux 6.6 released

It's been an unusual long time between releases - but now nearly eleven months after the last release Red Hat has announced the availability of RHEL 6.6. The kernel level is now kernel-2.6.32-504.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.

For System z this has been a mainly a fix release. Only a few small enhancements have been added all described in the technical notes. Here are some of them:
  • libhugetlbfs support for System z
  • crypto updates: libica, opencryptoki
  • read only sequential data set access avoiding ftp/nfs transfers from z/OS using the zdfs file system
The IBM documentation for RHEL 6.4 on developerworks still applies for this release.

October 14, 2014

New article: Using Linux on System z Hardware Cryptography with the PKCS#11 Cryoptography Stack

As a follow on to the Java crypto article there is a new one covering PKCS#11 and the System z hardware stack published in the EnterpriseTech Journal.
It explains what PKCS#11 is and how the API works and what methods are supported. Then it covers OpenCryptoki the open source implementation of PKCS#11 and how it's configured and used. This article is for everyone who is seeking better understanding of the exploitation of the hardware crypto facilities from Linux on System z.

October 7, 2014

IBM General Parallel File System (GPFS) available for Linux on System z

IBM has announced the availability of the General Parallel File System (GPFS) aka Elastic Storage for Linux on System z. It's the new 4.1 version and for zLinux the minimum distribution requirements are
  • RHEL 6.5 + latest z stream patches
  • RHEL 7.0
  • SLES 11 SP3 + latest maintenance patches 
 There is also a short Redbook solution guide available.

September 17, 2014

Red Hat Enterprise Linux 5.11 released

Red Hat has announced the availability of RHEL 5.11. You can find more information on this here:
This update is the last update for the great RHEL 5 and the support will finally end in March 2017 (see life cycle page from Red Hat). Even though this seems to be far away right now, please mark your calendars for migration planning!

From a System z perspective this is a pure bug fix release. No new features have been added.

(updated 10/12/2014)

August 13, 2014

MongoDB on zLinux

MongoDB is being requested for zLinux  quite a lot. With the v8 engine now available it can be build on zLinux. Andrew Low and Joran Siu have created a short writeup on "How to build MongoDB on Linux on System Z".

So this is a start!

July 16, 2014

IBM SDK for Node.js Version 1.1 for Linux on System z is generally available

IBM has published a version of the server side Javascript engine node.js for Linux on System z on developerworks. This gives you a stand-alone JavaScript engine also on System z.

You can also download the current development source for the components node and the Javascript engine v8 from github.

Hopefully the final version will be released later this year!

(updated 8/16/2014)

July 4, 2014

Red Hat Enterprise Linux 7 (RHEL 7) released

After a long development phase Red Hat has finally announced the next major release of their enterprise distribution. Everything is new and updated, so it will take time to get familiar with the new distribution.

The kernel level of the GA version is kernel-3.10.0-123, however as this is a new release I strongly recommend everyone to apply the updates from Red Hat to get the bug fixes that didn't make the DVD! As of 7/4 the latest update kernel is kernel-3.10.0-123.4.

Here is my usual summary of links to more information:
As this is a brand new release there are some hick ups aka bugs to be expected. If you are hitting one, please open a bug report with Red Hat and/or IBM.


(updated 10/31/2014)