IBM Systems Magazine, Mainframe - November/December 2016 - L13


Today, our clients are running their critical

applications on Linux on z Systems. We have clients doing payments,
payroll, mobile banking, real-time analytics and data warehousing."
-Martin Schwidefsky, Linux on z Systems development, IBM Germany Research & Development

clients can use. We began
working with SUSE first and
then Red Hat. In April 2016,
Canonical's Ubuntu was made
available on z Systems.
The Linux team at IBM
concentrates on core elements,
such as device drivers and
compilers. SUSE, Red Hat and
Ubuntu put together all of
the moving parts and create
something usable by our clients.
The distributors focus on
different parts of the OS and
vary in their offerings. Red
Hat and SUSE have a select
set of packages. The Ubuntu
distribution offers one of the
largest collections of opensource packages.
ISM: How does KVM on z Systems
improve performance and flexibility?
MS: KVM has different
aspects: the kernel module, a
combination of the interface
driver and the kernel module to
provide a VM on Linux, and the
IBM KVM product.
IBM's KVM is an alternative
to our z/VM* Hypervisor, which
won't go away any time soon.
KVM and z/VM Hypervisor can
co-exist on the same system.
KVM allows IBM to expand
our audience for Linux on
z Systems and enables us to
attract new clients who already

have KVM installed or who lack
the necessary z/VM skills. If the
IT shop lacks z/VM skills, it's
easier to use KVM because it uses
standard interfaces.
z/VM Hypervisor still has an
advantage, particularly with the
I/O landscape because you can
have dedicated devices with the
guest. With KVM, only virtual I/O
exists right now.
IBM has optimized KVM to
run on z Systems to get the best
performance from the machine.
We also have a cloud offering
where you can integrate KVM
into the cloud.
ISM: What are some of the new
kernel versions that have been
developed?
MS: The kernel community
doesn't think of kernel releases
as you might have with a product
release. When a new piece of
code is ready, it's published for
review. If everyone is content
with the code, it's placed to be
picked up as part of the next
kernel release.
The distributions created
by our distributor partners
are probably more important.
Whenever we have a new
z Systems machine, we
provide support code for that
machine to our distributors to
be incorporated into the old

distributions. Many clients are
using an older version of the
kernel, so we backport the new
code so they can use it. The
institutional release becomes the
critical factor-not the kernel.

Almost

50%

of z Systems
customers have
Linux installed on
their systems as
of 2Q 2016

ISM: Could you talk about kernel removal and why you would remove it?
MS: Large sections of code in the
kernel have fallen out of use. We
remove these to make the kernel
smaller and easier to handle.
For example, we've removed the
capability to compile a 31-bit kernel because all of the machines
now use a 64-bit kernel. The
64-bit kernel can still run 31-bit
applications.
ISM: What services/workloads will
be driving demand for Linux on
z Systems over the next several
years? Why?
MS: In the end, demand is driven
by whatever the client needs to do
with the platform. Certain trends
in the industry, such as blockchain, are becoming important.
Big data and analytics remain
important. Payroll applications
are critical for some clients.
If clients require changes,
we do so. You have to provide
new solutions that are ready to
be picked up by the client, but
you must also take care of client
needs.

Linux on z Systems NOVEMBER 2016 // 13

Linux_on_z_1116.indd 13

9/29/16 1:14 PM



Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - November/December 2016

Editor's Desk: Mastering their craft
IBM Perspective: Expanding mainframe ecosystem creates opportunities for Gen Z
Partner PoV: Workplace Diversity: Attract the best talent by encouraging more options for women
IT Today: Financial Feasibility: IBM Global Financing designs customized solutions for technology investments
Currents: Giving Data Structure: Find the right database management systems to maximize information
Case Study: Investing in a Difference: Primerica Life Insurance Co. improves processing and performance
Cover Story: Sparking Student Interest: IBM Master the Mainframe World Championship exposes top students to analytics and data storage
Feature: The Modern Mainframer: The IBM z platform attracts recent grads to its orbit
Women in Tech: Taking a Seat at the IT Table: Women meet challenges, savor successes in the IT field
Tech Corner: Get in the Cloud: z/OS solutions can connect to the cloud through REST interfaces
Solutions: API Integration Platform 3.0, OpenLegacy; Ivory Service Architect V5.1, GT Software
Stop Run: Code Your Own Way: High school girls take charge of their futures
Reference Point - Global Events, Education, Resources for Mainframe
Linux on z Systems E-book
2016 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - November/December 2016 - Intro
IBM Systems Magazine, Mainframe - November/December 2016 - Cover1
IBM Systems Magazine, Mainframe - November/December 2016 - Cover2
IBM Systems Magazine, Mainframe - November/December 2016 - 1
IBM Systems Magazine, Mainframe - November/December 2016 - 2
IBM Systems Magazine, Mainframe - November/December 2016 - 3
IBM Systems Magazine, Mainframe - November/December 2016 - 4
IBM Systems Magazine, Mainframe - November/December 2016 - 5
IBM Systems Magazine, Mainframe - November/December 2016 - Editor's Desk: Mastering their craft
IBM Systems Magazine, Mainframe - November/December 2016 - 7
IBM Systems Magazine, Mainframe - November/December 2016 - IBM Perspective: Expanding mainframe ecosystem creates opportunities for Gen Z
IBM Systems Magazine, Mainframe - November/December 2016 - Partner PoV: Workplace Diversity: Attract the best talent by encouraging more options for women
IBM Systems Magazine, Mainframe - November/December 2016 - 10
IBM Systems Magazine, Mainframe - November/December 2016 - IT Today: Financial Feasibility: IBM Global Financing designs customized solutions for technology investments
IBM Systems Magazine, Mainframe - November/December 2016 - 12
IBM Systems Magazine, Mainframe - November/December 2016 - 13
IBM Systems Magazine, Mainframe - November/December 2016 - Currents: Giving Data Structure: Find the right database management systems to maximize information
IBM Systems Magazine, Mainframe - November/December 2016 - 15
IBM Systems Magazine, Mainframe - November/December 2016 - 16
IBM Systems Magazine, Mainframe - November/December 2016 - 17
IBM Systems Magazine, Mainframe - November/December 2016 - Case Study: Investing in a Difference: Primerica Life Insurance Co. improves processing and performance
IBM Systems Magazine, Mainframe - November/December 2016 - 19
IBM Systems Magazine, Mainframe - November/December 2016 - 20
IBM Systems Magazine, Mainframe - November/December 2016 - 21
IBM Systems Magazine, Mainframe - November/December 2016 - 22
IBM Systems Magazine, Mainframe - November/December 2016 - 23
IBM Systems Magazine, Mainframe - November/December 2016 - Cover Story: Sparking Student Interest: IBM Master the Mainframe World Championship exposes top students to analytics and data storage
IBM Systems Magazine, Mainframe - November/December 2016 - 25
IBM Systems Magazine, Mainframe - November/December 2016 - 26
IBM Systems Magazine, Mainframe - November/December 2016 - 27
IBM Systems Magazine, Mainframe - November/December 2016 - Feature: The Modern Mainframer: The IBM z platform attracts recent grads to its orbit
IBM Systems Magazine, Mainframe - November/December 2016 - 29
IBM Systems Magazine, Mainframe - November/December 2016 - 30
IBM Systems Magazine, Mainframe - November/December 2016 - 31
IBM Systems Magazine, Mainframe - November/December 2016 - 32
IBM Systems Magazine, Mainframe - November/December 2016 - Women in Tech: Taking a Seat at the IT Table: Women meet challenges, savor successes in the IT field
IBM Systems Magazine, Mainframe - November/December 2016 - 34
IBM Systems Magazine, Mainframe - November/December 2016 - 35
IBM Systems Magazine, Mainframe - November/December 2016 - 36
IBM Systems Magazine, Mainframe - November/December 2016 - 37
IBM Systems Magazine, Mainframe - November/December 2016 - 38
IBM Systems Magazine, Mainframe - November/December 2016 - 39
IBM Systems Magazine, Mainframe - November/December 2016 - 40
IBM Systems Magazine, Mainframe - November/December 2016 - 41
IBM Systems Magazine, Mainframe - November/December 2016 - 42
IBM Systems Magazine, Mainframe - November/December 2016 - 43
IBM Systems Magazine, Mainframe - November/December 2016 - Tech Corner: Get in the Cloud: z/OS solutions can connect to the cloud through REST interfaces
IBM Systems Magazine, Mainframe - November/December 2016 - 45
IBM Systems Magazine, Mainframe - November/December 2016 - 46
IBM Systems Magazine, Mainframe - November/December 2016 - Solutions: API Integration Platform 3.0, OpenLegacy; Ivory Service Architect V5.1, GT Software
IBM Systems Magazine, Mainframe - November/December 2016 - Stop Run: Code Your Own Way: High school girls take charge of their futures
IBM Systems Magazine, Mainframe - November/December 2016 - Cover3
IBM Systems Magazine, Mainframe - November/December 2016 - Cover4
IBM Systems Magazine, Mainframe - November/December 2016 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - November/December 2016 - RF2
IBM Systems Magazine, Mainframe - November/December 2016 - Linux on z Systems E-book
IBM Systems Magazine, Mainframe - November/December 2016 - L2
IBM Systems Magazine, Mainframe - November/December 2016 - L3
IBM Systems Magazine, Mainframe - November/December 2016 - L4
IBM Systems Magazine, Mainframe - November/December 2016 - L5
IBM Systems Magazine, Mainframe - November/December 2016 - L6
IBM Systems Magazine, Mainframe - November/December 2016 - L7
IBM Systems Magazine, Mainframe - November/December 2016 - L8
IBM Systems Magazine, Mainframe - November/December 2016 - L9
IBM Systems Magazine, Mainframe - November/December 2016 - L10
IBM Systems Magazine, Mainframe - November/December 2016 - L11
IBM Systems Magazine, Mainframe - November/December 2016 - L12
IBM Systems Magazine, Mainframe - November/December 2016 - L13
IBM Systems Magazine, Mainframe - November/December 2016 - L14
IBM Systems Magazine, Mainframe - November/December 2016 - L15
IBM Systems Magazine, Mainframe - November/December 2016 - L16
IBM Systems Magazine, Mainframe - November/December 2016 - L17
IBM Systems Magazine, Mainframe - November/December 2016 - L18
IBM Systems Magazine, Mainframe - November/December 2016 - L19
IBM Systems Magazine, Mainframe - November/December 2016 - L20
IBM Systems Magazine, Mainframe - November/December 2016 - L21
IBM Systems Magazine, Mainframe - November/December 2016 - L22
IBM Systems Magazine, Mainframe - November/December 2016 - L23
IBM Systems Magazine, Mainframe - November/December 2016 - 2016 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - November/December 2016 - SE2
IBM Systems Magazine, Mainframe - November/December 2016 - SE3
IBM Systems Magazine, Mainframe - November/December 2016 - SE4
IBM Systems Magazine, Mainframe - November/December 2016 - SE5
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