Enterprise Developers, Linux and z Systems - What you Need to Know

World®
’16
Enterprise Developers, Linux and z
Systems - What you Need to Know
Scott Fagen
Distinguished Engineer - Chief Architect – Mainframe and Workload Automation
CA Technologies
MFX114V
MAINFRAME AND WORKLOAD AUTOMATION

2 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
© 2016 CA. All rights reserved. All trademarks referenced herein belong to their respective companies.
The content provided in this CA World 2016 presentation is intended for informational purposes only and does not form any type of
warranty. The information provided by a CA partner and/or CA customer has not been reviewed for accuracy by CA.
For Informational Purposes Only
Terms of this Presentation

Abstract
Enterprises continue to rely on mission essential mainframe systems for heavy-duty processing,
security and data compliance. In this intro session from our CTO organization, learn the basics
and benefits of deploying your application on Linux on z Systems and why it may provide more
value for less cost than a more traditional distributed implementation.
Scott
Fagen
CA Technologies
Distinguished Engineer,
Chief Architect –
Mainframe and
Workload Automation

What is Linux?
§ A UNIX-like system, first kernel created and released by Linus
Torvalds (1991)
§ Freely available via the web for many platforms
§ Governed by GNU Public License (GPL)
– Copyleft: anyone may redistribute or extend, but requires that
everybody is free to copy or use that redistribution or extension
§ Available from distributors
– Cost covers packaging, distribution, ongoing support and fixes

Distribution
Operating System
Kernel
What is Linux?
§ Composition:
– A kernel
The kernel is the heart of the operating system.
It manages the system’s hardware resources,
defines and manages virtual resources, and
provides software mediation between other
programs and those resources
– An operating system
The operating system provides additional functions that “surround” the kernel to make
the system usable by administrators, applications, and end users
– A distribution
A distribution is a software package that includes the kernel, operating system, utilities
and applications that are delivered as a unit

Linux on z Systems
§ Introduced in 1999
§ Was Linux/390, Linux on zSeries, Linux on System z, etc.
§ Not distributed by IBM
– RedHat, SuSE, Ubuntu
– IBM does contribute intellectual property, device drivers, other code

LinuxONE vs. z13
What’s the difference?
IBM® LinuxONE
RockhopperTM
IBM® LinuxONE
Emperor™
IBM® z13s
IBM® z13
The IBM LinuxONE and IBM z13
are the same hardware.
Firmware limits a LinuxONE to
only running Linux.
Much of this is a branding
exercise – to be able to talk to
a market that may have an
aversion to “mainframe.”

Linux is Linux is Linux
§ The kernel, operating system, and utilities are written in
higher level languages (typically gcc)
§ (Pure) Java enables near perfect portability
– Not all software has been validated on every platform
– JNI can be problematic (platform specific)

Linux is Linux is Linux
© 2016 CA. All RIGHTS RESERVED.9
Linux on z Systems Instruction Set and I/O Hardware
Linux Kernel
Architecture Independent Code
HW Dependent Drivers
Linux Applications
Generic Drivers
Network Protocols File systems
Platform Dependent Code
<2.0% platform specific code
Backend
0.5% platform specific code
GNU Runtime Environment
Process
Management
Memory
Management
Backend
0.3% platform specific code
GNU Complier Suite
Most applications
will run on any Linux
platform without
code changes; just
recompile.
Java is completely
portable.
You may want to do
some coding to
optimize for
platform advantage.

Virtualization
§ PR/SM plus z/VM and/or KVM enables two levels of
indirection for system resources
– 85 LPARS
– Hundreds to thousands of guests (virtual machines) within an LPAR
– Hardware recovery actions transparent to running applications
§ Resources can “flow” between guests and LPARs
– Prevents resources from going “fallow” after a failure
§ Allows for massive over-commitment of resources
The most important z Systems advantage

z Systems Differentiation
§ z Systems hardware is designed to run
multiple workloads concurrently
– More cache, levels of cache, and memory to
support shared workloads
– Dedicated I/O subsystem delivers high
bandwidth and achieves high density for
workloads with heavy I/O
– Physical resources (CPU, I/O, compression,
crypto, etc.) are virtualized and shared
across workloads
§ Component failures not visible to applications
Physical
resources
managed
by PR/SM
Virtualized
resources
in LPARs
Memory
IFLs
I/O and Network
Linux
Guests
Linux
Linux
Guests
Linux
Guests
z/VM z/VM KVM
LPAR LPAR LPAR LPAR

§ Highest levels of resource sharing: CPU,
I/O and memory
– Achieve near continuous 100% utilization
– Save on software license fees
– Consume less power and floor space
– All networking is virtual: no switches or wires
§ Reduced complexity
– Can non-disruptively add/delete hardware
resources for vertical and horizontal scaling

§ Since all of the guests/VMs share common disk, implementation of any
software update only needs to be done once (not once per server or VM):
– Many VMs or guests can point to the same binaries on disk
(Similar to the concept of a z/OS shared SYSRES)
§ Just need to make the update and restart the appropriate VMs or guests
§ Can greatly reduce roll-out times for changes
– Static shared memory (i.e. programs) and can be defined across hundreds of
guests, similar to VMWare but at a much larger scale
§ Can greatly reduce the amount of memory required in a large scale-out environment

§ z Systems hardware is rated at 99.999% availability
– Comprehensive, multi-layered strategy for reliability and serviceability
– Concurrent operations with hardware repair and upgrade protects
against outages
– Idle servers don’t consume resources
– Elastic resource management through Capacity on Demand
– EAL5 security between LPARs
§ Virtual machines cannot circumvent workload isolation
Memory
IFLs
I/O and Network
LPAR LPAR LPAR LPAR

§ Extreme virtualization eliminates the need for
switches and miles of network connectivity
– Virtual networks between guests in the same LPAR
– HiperSockets™ provide secure, memory-speed
cross-LPAR communication
– Shared Memory Communications (SMC-R)
provides high-speed, low latency communication
between machines
– Multi-tier/micro-service applications run better on
a more reliable (virtual), no latency network
Linux
Guests
z/VM z/VM KVM
LPAR LPAR LPAR
Linux
Guests
Linux
Guests
Linux
Guests
z/VM z/VM KVM
LPAR LPAR LPAR
Linux
Guests
Linux
Guests
Hipersockets
SMC-R
Hipersockets

Synergy with z/OS
§ Proximity to z/OS resident transactions
and data:
– Hipersockets and SMC-R
– Hypervisor assists
– Increased transaction throughput
– Improved response times
– Integrated storage management and backup
Memory
IFLs
I/O and Network
Linux
Guests
z/OS
Linux
Guests
z/VM z/VM
LPAR LPAR LPAR LPAR
z/OS
Hipersockets

Customer Use Cases
§ Large scale implementations:
– Oracle
– DB2-UDB
– SAP
– WAS (and other open source application serving)
– Websphere Portal
– Applications with affinity to “back-end” z/OS and z/VSE transactions
§ Often easier to augment the application through Linux/JAVA than COBOL
– Server consolidation

Docker
§ After PR/SM, z/VM or KVM, one can also run Docker in Linux
on zSystems
§ IBM tested 1,200,000 containers on a LinuxONE Emperor:
– 141 CPUs, 10TB RAM, 10LPARs
– 100 SLES 12 Linux guests per LPAR
– Docker 1.8.2 in each Linux guest, with 1200 containers each
§ CA Technologies is using Docker and Linux on z Systems to
deliver net new capability
– See Intelligent Mainframe Management

Open Mainframe Project
§ Bring together under a formal structure, an open source, technical community
with a mutual interest in advancing the surrounding ecosystem and adoption of
Linux on the mainframe as an enterprise-grade platform
§ Open collaboration across academic, government and corporate partners to
advance z Systems as an enterprise-grade platform for Linux.
§ Design and develop shared technology elements
§ Provide development and test resources through a collaboration hub that lowers
barriers to joint development activities
§ Provide access to free education and information
§ Improve the experience of users of the mainframe platform when running Linux
Linux Foundation

CA Technologies and Linux on z Systems
CA is the only ISV with a comprehensive Linux on System z management portfolio
Data Protection
Application
Performance
and Infrastructure
Management
Workload
Automation
Event
Automation
Security
z/VM Management
Provisioning
System z
z/VM
Linux on System z
Performance
Management
Application
Development
CA VM:Manager Suite for
Linux on System z
CA Workload
Automation
Agents
CA VM:Secure
CA VM:Director
CA VM:Archiver CA SiteMinder Web Access
CA Access Control
CA Top Secret® for z/VM
CA ACF2™ for z/VM
CA VM:Secure
CA VM:Operator™
CA Mainframe for Linux on
System z Connector
CA Gen
CA APM and UIM
CA VM:Explore
CA VM:Backup
CA is the only ISV with a comprehensive Linux on System z management portfolio

Summary
§ Linux is Linux is Linux
– Broad catalog of available software
– Administration and management are largely the same
§ For large scale implementations, Linux on z Systems can be
better economically than a huge investment in x86 servers
+1000 Units
CostperUnit
Total Units
Average
Unit Cost

Recommended Sessions
SESSION # TITLE DATE/TIME
MFT179T What the Open Mainframe Project Could Mean For You 11/16/2016 at 4:30 pm
MFT148S
Roadmap Session: Achieve DevOps on the Mainframe for
Faster Time to Market
11/16/2016 at 4:30 pm
MFX110V
Mainframe Application Modernization for Enterprise
Developers
11/17/2016 at 1:45 pm

Must See Demos
Modern Application
Development
Mainframe Theater
Continuous Development and
Testing
Mainframe Theater

Questions?

Thank you.
Stay connected at communities.ca.com

Mainframe and Workload Automation
For more information please visit ca.com/mainframe

Enterprise Developers, Linux and z Systems - What you Need to Know

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