IBM Systems Magazine, Mainframe - May/June 2016 - 24

IBM z Systems servers are far
more powerful than typical
scale-out models. Mainstream
Intel* cores support clock speeds
of roughly 2.3 to 3.5 GHz, while
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. Each IBM z core
has over 4.3x more on-chip cache
per core than an Intel core. IBM z
also has shared L4 cache, which
doesn't exist on Intel chips.
The impact of clock speed,
memory and cache differences
means that data-driven, cacheintensive, compute-intensive
workloads run faster on Linux on
IBM z than on x86 servers.
Database workloads are by
nature very cache-intensive. IBM
engineers ran a pure memory
database access test on an IBM
z13 with six cores running Linux.
The same test produced virtually
the same results on an x86-based
server but required 80 cores.
Because the test ran with so
many fewer cores on the z13, the
database software was calculated
to be 6.7x more expensive on the
x86 server than on Linux on z,
according to IBM.
In another example, engineers at
IBM Research have recently done
medical-related data modeling,
looking for breakthroughs in
disease prevention and control.
Typically, these studies use huge
amounts of data and involve
compute-intensive algorithms.

When running these studies on
large clusters of x86 servers,
the data must be partitioned
horizontally across the servers,
and the test itself may take over a
week to run because of repeated
sharding and merging of the data.
Alternatively, the researchers found
the tests could be run in less than
an hour on Linux on z Systems,
primarily because the large cache
and memory on the IBM z13
eliminated the need for sharding,
and the faster clock speeds ran the
computations faster.
Linux on IBM z is also
supported by an exceptional I/O
system, supporting about 80x
more I/O channel processors than
typical x86 servers. This means
I/O intensive workloads also run
faster and more efficiently on
IBM z. Using data from a customer
proof of concept, IBM showed that
the database workload required
432 cores when running on an
x86 cluster, but only 61 IFLs
when running on Linux on IBM z.
The configuration was calculated
to have a 54 percent lower cost
of acquisition.
Unlike scale-out servers, IBM z
is designed with multiple levels
of virtualization, efficiently
supporting large numbers of
business workloads, all in one
box. The IBM z13 platform can
support up to 85 LPARs, and
the z13s up to 40. Each LPAR
is completely isolated from the
others, with the PR/SM* partition
management functionality "baked"
into the firmware. Common Criteria
rates PR/SM as EAL5+, higher
than any other commercially

24 // MAY/JUNE 2016 ibmsystemsmag.com

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

available hypervisor. Each LPAR
can optionally run its own
software hypervisor (z/VM* or
Kernel-based VM), with each
hypervisor instance supporting
upward of 50 VMs running
Linux. Additionally, PR/SM on
IBM z is exceptionally efficient
at managing system resources,
ensuring high priority workloads
in one LPAR will deliver to
service levels, even if lower
priority workloads are running
in neighboring LPARs. IBM has
shown that the leading x86
hypervisor can't match this
service delivery when running
mixed priority workloads in
neighboring VMs.
IBM z is designed for resources
(e.g., CPUs, memory, I/O, etc.) to
be added dynamically without
disruption to the running
environment. This allows for a
Linux platform that can scale
both horizontally (new Linux VMs
can be added as resources are
added) and vertically (resources
are added to an existing VM) (see
Figure 1, page 25).
These capabilities add up to
some impressive numbers-the
platform is capable of driving
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.


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IBM Systems Magazine, Mainframe - May/June 2016

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - May/June 2016

Table of Contents
Editor's Desk: Flexible and agile environment
IBM Perspective: Elevating open source for the enterprise
Partner PoV: New information about threats in the z/OS system improves performance
The new IBM z13 can consolidate Linux workloads at a lower cost
Focus on Storage: IBM Spectrum Storage Suite offers a new way of licensing storage software
Cover Story: Achieving An Advantage: Linux on z Systems enables the API economy and microservices while enhancing hybrid cloud solutions
Feature: A Better Option: Businesses see an advantage to using Linux on z Systems over scale-out servers
Tech Showcase: CISOs can mitigate mobile security fears and prevent issues in the workplace
Tech Corner: IBM DB2 on z/OS V2.2 features space and storage ehancements
Administrator: IBM Multi-Factor Authentication fo z/OS helps maintain a secure infrastructure
Solutions: Universal Data Manager; OpenLegacy V3.0
Stop Run: 19-year-old mainframe enthusiast installs a z890 in his parents' basement
Reference Point - Global Events, Education, Resources for Mainframe
2016 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - May/June 2016 - Intro
IBM Systems Magazine, Mainframe - May/June 2016 - Cover1
IBM Systems Magazine, Mainframe - May/June 2016 - Cover2
IBM Systems Magazine, Mainframe - May/June 2016 - 1
IBM Systems Magazine, Mainframe - May/June 2016 - Table of Contents
IBM Systems Magazine, Mainframe - May/June 2016 - 3
IBM Systems Magazine, Mainframe - May/June 2016 - 4
IBM Systems Magazine, Mainframe - May/June 2016 - 5
IBM Systems Magazine, Mainframe - May/June 2016 - Editor's Desk: Flexible and agile environment
IBM Systems Magazine, Mainframe - May/June 2016 - 7
IBM Systems Magazine, Mainframe - May/June 2016 - IBM Perspective: Elevating open source for the enterprise
IBM Systems Magazine, Mainframe - May/June 2016 - Partner PoV: New information about threats in the z/OS system improves performance
IBM Systems Magazine, Mainframe - May/June 2016 - 10
IBM Systems Magazine, Mainframe - May/June 2016 - The new IBM z13 can consolidate Linux workloads at a lower cost
IBM Systems Magazine, Mainframe - May/June 2016 - 12
IBM Systems Magazine, Mainframe - May/June 2016 - 13
IBM Systems Magazine, Mainframe - May/June 2016 - 14
IBM Systems Magazine, Mainframe - May/June 2016 - Focus on Storage: IBM Spectrum Storage Suite offers a new way of licensing storage software
IBM Systems Magazine, Mainframe - May/June 2016 - 16
IBM Systems Magazine, Mainframe - May/June 2016 - 17
IBM Systems Magazine, Mainframe - May/June 2016 - Cover Story: Achieving An Advantage: Linux on z Systems enables the API economy and microservices while enhancing hybrid cloud solutions
IBM Systems Magazine, Mainframe - May/June 2016 - 19
IBM Systems Magazine, Mainframe - May/June 2016 - 20
IBM Systems Magazine, Mainframe - May/June 2016 - 21
IBM Systems Magazine, Mainframe - May/June 2016 - Feature: A Better Option: Businesses see an advantage to using Linux on z Systems over scale-out servers
IBM Systems Magazine, Mainframe - May/June 2016 - 23
IBM Systems Magazine, Mainframe - May/June 2016 - 24
IBM Systems Magazine, Mainframe - May/June 2016 - 25
IBM Systems Magazine, Mainframe - May/June 2016 - 26
IBM Systems Magazine, Mainframe - May/June 2016 - Tech Showcase: CISOs can mitigate mobile security fears and prevent issues in the workplace
IBM Systems Magazine, Mainframe - May/June 2016 - 28
IBM Systems Magazine, Mainframe - May/June 2016 - 29
IBM Systems Magazine, Mainframe - May/June 2016 - 30
IBM Systems Magazine, Mainframe - May/June 2016 - 31
IBM Systems Magazine, Mainframe - May/June 2016 - 32
IBM Systems Magazine, Mainframe - May/June 2016 - 33
IBM Systems Magazine, Mainframe - May/June 2016 - 34
IBM Systems Magazine, Mainframe - May/June 2016 - 35
IBM Systems Magazine, Mainframe - May/June 2016 - 36
IBM Systems Magazine, Mainframe - May/June 2016 - 37
IBM Systems Magazine, Mainframe - May/June 2016 - 38
IBM Systems Magazine, Mainframe - May/June 2016 - 39
IBM Systems Magazine, Mainframe - May/June 2016 - Tech Corner: IBM DB2 on z/OS V2.2 features space and storage ehancements
IBM Systems Magazine, Mainframe - May/June 2016 - 41
IBM Systems Magazine, Mainframe - May/June 2016 - 42
IBM Systems Magazine, Mainframe - May/June 2016 - 43
IBM Systems Magazine, Mainframe - May/June 2016 - Administrator: IBM Multi-Factor Authentication fo z/OS helps maintain a secure infrastructure
IBM Systems Magazine, Mainframe - May/June 2016 - 45
IBM Systems Magazine, Mainframe - May/June 2016 - 46
IBM Systems Magazine, Mainframe - May/June 2016 - Solutions: Universal Data Manager; OpenLegacy V3.0
IBM Systems Magazine, Mainframe - May/June 2016 - Stop Run: 19-year-old mainframe enthusiast installs a z890 in his parents' basement
IBM Systems Magazine, Mainframe - May/June 2016 - Cover3
IBM Systems Magazine, Mainframe - May/June 2016 - Cover4
IBM Systems Magazine, Mainframe - May/June 2016 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - May/June 2016 - 2016 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - May/June 2016 - SE2
IBM Systems Magazine, Mainframe - May/June 2016 - SE3
IBM Systems Magazine, Mainframe - May/June 2016 - SE4
IBM Systems Magazine, Mainframe - May/June 2016 - SE5
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