IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L7

For years, z Systems mainframes have been designed to
operate with the highest levels
of reliability and availability,
and the z13s is no different. At
the hardware level, it ships with
redundant cores, which guarantees continuous availability, even
in the rare event of hardware
failure. Further, redundancy
in the memory subsystem is
built-in using the highly available z Systems redundant array
of independent memory technology. At the hypervisor level,
there's support for live guest
migration to help automate and
speed recovery from planned and
unplanned outages.

Middleware Efficiency

With the z13s, Linux workloads
can be consolidated on a
smaller footprint at a lower cost
compared with other x86-based
options. The latest IBM total cost
of ownership (TCO) study looks
at the cost to consolidate Linux

workloads on the z13s compared
with deploying them on-premises
on the leading x86 alternative or
using off-premises, x86-based
public cloud resources.
For this study, it's assumed
there are 12 Linux web workloads running 24-7. Each
workload is a two-tier web
application consisting of two
VMs, where one VM is running
the front web tier on WebSphere*
Application Server Network
Development, accessing data on
the second VM that's deployed
with the data tier on the DB2*
database. Each workload is driving, on average, 620 transactions
per second. All in all, 24 VMs,
running a total of 12 workloads,
are defined as general purpose
VMs, each with two virtual CPUs,
8 GB of virtual memory and 20
GB of virtual storage.
Extensive benchmarks were
conducted to determine what
configurations are needed to
consolidate a total of 12 Linux

web workloads (24 VMs) on z13s
servers, on-premises x86 systems
and off-premises public resources
while meeting the service levels
for the workloads in terms of
desired transaction throughput
and response times. In the
z13s case, IBM consolidated
the workloads on one LPAR
using KVM with eight IFLs,
384 GB of memory and storage
(IBM Storwize* V7000) of 1.6 TB
while meeting all service levels.
For the x86 case, workloads
were deployed running KVM
on two x86 systems with a total
of 48 cores, 384 GB of memory
and 1.6 TB of storage. For the
off-premises public cloud case,
the workloads could be deployed
on a total of 24 instances (VMs)
where each instance (VM) had
two virtual CPUs, 8 GB of virtual
memory and 20 GB of storage.
Based on the configurations
determined from benchmarks,
the costs were modeled over
three years for workloads

Table 1: Cost Model Assumptions
Cost Elements

IBM z13s

Infrastructure

One IBM z13s system:
* 8 IFLs
* 384 GB memory
* KVM hypervisor running in 1 LPAR
* Suse Linux Enterprise Server (SLES)
as OS for workloads running in
1 LPAR
* IBM Storwize V7000
* 1.6 TB SSDs

24 VMs (2 VMs per workload):
Middleware

* 12 VMs running WebSphere
Application Server Network
Deployment (ND)

* 12 VMs running DB2 Enterprise
Server Edition

Labor

Includes costs to manage
infrastructure and VMs

x86-based systems

public cloud

Two x86 systems:
* 48 cores (24 cores per system)
* 384 GB memory (192 GB per system)
* KVM hypervisor running on
each system
* SLES as OS for workloads running
on 2 systems
* 1.6 TB internal SSDs (800 GB
per system)

24 virtual instances (in U.S. east):
* 48 virtural CPUs (2 virtural CPU
per instance)
* 192 GB memory (8 GB per instance)
* SLES as OS for instances
* 960 GB of persistent storage
(20 GB per instance)
* Total data transfer out of 2154 GB/day
* Enterprise support

24 VMs (2 VMs per workload):

24 virtual instances (2 virtual
instances per workload):

* 12 VMs running WebSphere
Application Server ND

* 12 VMs running DB2 Enterprise
Server Edition

Includes costs to manage
infrastructure and VMs

* 12 instances running WebSphere
Application Server ND
* 12 instances running DB2 Enterprise
Server Edition

Includes costs to manage
virtual instances

Linux on z Systems NOVEMBER 2016 // 7

Linux_on_z_1116.indd 7

9/29/16 1:13 PM



IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book

Table of Contents
Editor's Desk: Linux on Ibm Z Adoption Grows
Ibm Perspective: Linux on Z Systems Provides Financial Industry a Foundation for Blockchain
Small and Efficient: The New Ibm Z13s Can Consolidate Linux Workloads at a Lower Cost
Cover Story: Open to Opportunity: Why More Z Systems Clients Are Running Linux
Feature: Achieving and Advantage: Linux on Z Systems Enables the Api Economy and Microservices While Enhancing Hybrid Cloud Solutions
Feature: A Better Option: Businesses See the Benefits of Using Linux on Z Systems Over Scale-Out Servers
Trends: Plentiful Middleware Options: Co-Locating Analytics on Linux on Z Systems Adds Value
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L1
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L2
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Editor's Desk: Linux on Ibm Z Adoption Grows
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Ibm Perspective: Linux on Z Systems Provides Financial Industry a Foundation for Blockchain
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L5
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Small and Efficient: The New Ibm Z13s Can Consolidate Linux Workloads at a Lower Cost
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L7
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L8
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L9
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Cover Story: Open to Opportunity: Why More Z Systems Clients Are Running Linux
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L11
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L12
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L13
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Feature: Achieving and Advantage: Linux on Z Systems Enables the Api Economy and Microservices While Enhancing Hybrid Cloud Solutions
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L15
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L16
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L17
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Feature: A Better Option: Businesses See the Benefits of Using Linux on Z Systems Over Scale-Out Servers
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L19
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L20
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L21
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - Trends: Plentiful Middleware Options: Co-Locating Analytics on Linux on Z Systems Adds Value
IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L23
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