IBM Systems Magazine, Mainframe - November/December 2016 Linux on z Systems E-book - L21

thousands of Linux VMs and
massive Linux workloads with
thousands of users.
An IBM z13 running Linux was
shown to support the largest single
node of MongoDB, with a footprint
of more than 1 TB, sustained fetch
times of under 5 milliseconds and
the processing of over 2 billion
documents. Because this is a
single massive node on the z13,
sharding isn't necessary.
As evidenced by numerous real-world use cases, IBM z can support consolidation of hundreds
of commodity scale-out Linux
servers, with core ratios averaging
around the order of 10-to-1.

Co-Location Advantage

Today's digital business workloads
are frequently hybrid in that
they have multiple components,
typically serving SoR and SoE
functionality. With scale-out
servers, the components must
span across multiple physical
servers. On IBM z, they can run
in neighboring LPARs, which is
more advantageous because there
is no physical network. LPAR-toLPAR communication is done at
memory speed over the internal
HiperSockets* LAN built into the
system. There's no overhead of
a physical connection, thereby
minimizing latency, and no
physical exposure to potential
security threats. This mode of
communication is also transparent
to the applications running.
IBM has demonstrated
the advantages of co-located
hybrid workloads using the
IBM MobileFirst* Platform
Foundation (MFPF) server-which

runs on Linux-and a mobiledriven workload. When the MFPF
server was co-located on Linux
on z Systems with a z/OS-based
CICS* core banking back end,
the throughput transaction rate
was twice that of when the MFPF
server ran on a separate x86
server. The co-location case also
delivered 31 percent lower cost
per transactions per second.
In another test, an online
transaction processing (OLTP)
database was set up in a Linux on
z Systems LPAR. An Apache Spark
application was developed to run
analytics queries against that
database. The Spark queries were
run from a separate x86 server as
well as in a co-located LPAR on the
same server as the OLTP database.
IBM found that Spark running on
IBM z with the database drove up
to 3x more throughput than when
Spark ran off of the platform on
the x86 server.

Economic Benefit

One of the best methods for
comparing different platforms
is total cost of ownership (TCO),
where hardware and software
acquisition costs are coupled
with factors like labor, facilities
and power, networks, storage,
non-production environments,
growth plans, migration costs,
availability requirements and
extra security requirements.
Infrastructure costs are often
thought of as the most expensive
part of TCO, but software costs-
especially when priced per core-
are often the steepest.
Large-scale consolidation on
IBM z will drive up utilization

and reduce core requirements,
thus lowering software costs.
In-house case studies have
demonstrated this. A total
of 123 variable workloads
required 264 cores on 11 x86
servers, producing a three-year
TCO of $10.6 million. On an
IBM z13 system running Linux,
these workloads required only
32 cores, resulting in a threeyear TCO of $7.2 million, or
32 percent less. Even though
the infrastructure costs of the
z13 platform were about 5x
more than the x86 servers, the
substantial reduction in cores
led to a 72 percent reduction in
software costs, which brought
down the entire TCO.

Well-Rounded System

It's clear that Linux on IBM z is
an outstanding alternative to
scale-out x86 servers: IBM z is
supported by standard distributions from Red Hat, SUSE and
Canonical Ubuntu; over 3,000
Linux applications (e.g., Oracle
database) from hundreds of ISVs
are available for the platform; and
a wide array of open-source software is supported. Furthermore,
IBM internal testing has shown
that Linux on z Systems outperforms x86 servers in a variety of
middleware tests.
It is also a better choice than
scale-out x86 servers for large
cache- or I/O-intensive workloads
like database applications or
transaction processing, or for
consolidation of large numbers of
low utilization servers. Co-locating
hybrid workloads on IBM z also
typically delivers faster throughput
and reduced costs. Lastly, with
mixed workload environments,
Linux on z Systems often delivers
lower software license costs and
overall lower TCO.

IBM z13 cores
deliver

5.0 GHz

-the fastest
commercially
available-and
IBM z13s cores
run at

4.3 GHz
The z13
tops out at

10 TB

of memory,
with the z13s
capable of

4 TB

Emily Farmer is a z Systems
evangelist in the IBM Competitive
Projects Office.
Linux on z Systems NOVEMBER 2016 // 21

Linux_on_z_1116.indd 21

9/29/16 1:15 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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