IBM Systems Magazine, Mainframe - March/April 2017 - 16


CURRENTS

Instead, align the teams around
the business capability. Microservices are isolated, so you can
scale them as you require. For
some, you could bring up several
identical services and distribute
the load accordingly. For others,
you might scale one or two
instances vertically, keeping
an eye on high availability.
A microservice should be, as
the name suggests, small, but also
stateless-although this isn't a
hard requirement. Additional benefits exist when one team owns the
entire stack and each microservice
is independent of the others.
For example, if you have new
hires, they can quickly understand
how the microservice works. It also
doesn't matter what language it's
written in. Want to give new hires
who know Java* a side project? Let
them write it in Java. Need a particular microservice to be highly
performant? Write it in Assembler
or C. All you have to do is agree on
the interfaces so each team knows

how to talk to the others. It's a
good idea to version the APIs you
expose, too, to allow for changes
down the road.
Above all, make the communication explicit. (Those of you
who have dabbled with functional
programming will be familiar with
these ideas: no side effects.) These
microservices often communicate
with RESTful JSON, but it isn't the
only option. It must be lightweight
so you don't spend all of your time
chatting and little time processing.

Mainframe
and CICS as Host
To host these services you
want something that's reliable,
understands many languages,
can talk RESTful JSON and
already has tooling for DevOpsstyle deployment of resources in
this environment. This sounds
like IBM z/OS* and CICS*. You
can build and deploy resources
quickly and dynamically with a
pipeline utilizing tools such as the

z/OS Provisioning Toolkit
The z/OS Provisioning Toolkit is a simple command line utility
for the rapid provisioning of z/OS development environments,
including CICS. It's available at no charge of z/OS V2 clients.
Learn more about the toolkit, download it and get started at
developer.ibm.com/mainframe/products/zospt.

CICS Build Toolkit, DFHDPLOY
and UrbanCode* Deploy. CICS
even supports versioned APIs and
manages workloads.
But this brings us back to the
issue of provisioning the microservices themselves. It quickly
becomes apparent that you want
a technology to host several
of these in an isolated manner
and make them easy to update.
Container technology came about
as a way to solve this problem, by
allowing you to define an image
(i.e., a view of what you want
the microservice to look like)
and then deploy it as a container
(just an instance of an image),
abstracting away many of the
usual issues of deployment. Making this process fast changes the
game and can allow new ways
of working.

Using the z/OS
Provisioning Toolkit
Enter the z/OS Provisioning Toolkit (ibm.co/2kpm8Xj). It's useful
for systems beyond CICS, but, as
an example, can be used to bring
up a new CICS region in two
minutes. This helps in quickly
deploying microservices, but it's
also useful for application development. Each developer could
have her own CICS region, in use
only for as long as required. If
the developer makes a mistake,
it doesn't matter. Starting over
again only takes a few minutes.
This technology revolves
around images. An image is a
specific definition of a layer of
your system-back to the cake
analogy. The beauty of this
approach is that you can create
a new image by stacking together
existing images.
For example, you could start
from an existing image defining
a CICS Transaction Server VS 5.3
region with Liberty. You can say
"add to this, a web application
archive (WAR) file, to create a

16 // MARCH/APRIL 2017 ibmsystemsmag.com

pg 14-17.indd 4

2/7/17 1:09 PM


http://ibm.co/2kpm8Xj http://www.developer.ibm.com/mainframe/products/zospt http://www.ibmsystemsmag.com

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - March/April 2017

Table of Contents
Editor's Desk: Ahead of the Times
Techbits: Cognitive Customer Engagement
Partner PoV: Keep Data Out of Danger: Use the right tools to implement your large-object strategy
Currents: A Layered Approach: Using microservices on z Systems with CICS improves flexibility and reliability
IT Today: Choosing the Right Cloud: What to consider when using a managed service provider
R&D: Move Along: IBM Research and partners help traffic run smoothly in Madrid
Trends: How to Improve Your Sales Skills: Tips for techies on showing the value of their services
Feature: Strength in Collaboration: Linux on z Systems accelerates new and traditional workloads
Feature: Community Computing: The Open Mainframe Project expands educational opportunities for Linux on z Systems users
TECH Showcase: Shift-Left Testing Improves Success: Automated testing in the DevOps cycle improves quality and reduces risk
Tech Corner: Database Development: IBM DB2 V12 enhances and integrates data for cloud, mobile and analytics
Solutions: SMART TS XL V8.0, IN-COM Data Systems; Tubes, Macro 4; CleverView for TCP/IP on Linux V2.5, AES
Stop Run: A Global View: Computer science and astrophysics prove a natural fit
Reference Point - Global Events, Education, Resources for Mainframe
2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - March/April 2017 - Intro
IBM Systems Magazine, Mainframe - March/April 2017 - Cover1
IBM Systems Magazine, Mainframe - March/April 2017 - Cover2
IBM Systems Magazine, Mainframe - March/April 2017 - 1
IBM Systems Magazine, Mainframe - March/April 2017 - Table of Contents
IBM Systems Magazine, Mainframe - March/April 2017 - 3
IBM Systems Magazine, Mainframe - March/April 2017 - 4
IBM Systems Magazine, Mainframe - March/April 2017 - 5
IBM Systems Magazine, Mainframe - March/April 2017 - Editor's Desk: Ahead of the Times
IBM Systems Magazine, Mainframe - March/April 2017 - 7
IBM Systems Magazine, Mainframe - March/April 2017 - Techbits: Cognitive Customer Engagement
IBM Systems Magazine, Mainframe - March/April 2017 - 9
IBM Systems Magazine, Mainframe - March/April 2017 - 10
IBM Systems Magazine, Mainframe - March/April 2017 - 11
IBM Systems Magazine, Mainframe - March/April 2017 - Partner PoV: Keep Data Out of Danger: Use the right tools to implement your large-object strategy
IBM Systems Magazine, Mainframe - March/April 2017 - 13
IBM Systems Magazine, Mainframe - March/April 2017 - Currents: A Layered Approach: Using microservices on z Systems with CICS improves flexibility and reliability
IBM Systems Magazine, Mainframe - March/April 2017 - 15
IBM Systems Magazine, Mainframe - March/April 2017 - 16
IBM Systems Magazine, Mainframe - March/April 2017 - 17
IBM Systems Magazine, Mainframe - March/April 2017 - IT Today: Choosing the Right Cloud: What to consider when using a managed service provider
IBM Systems Magazine, Mainframe - March/April 2017 - 19
IBM Systems Magazine, Mainframe - March/April 2017 - 20
IBM Systems Magazine, Mainframe - March/April 2017 - 21
IBM Systems Magazine, Mainframe - March/April 2017 - R&D: Move Along: IBM Research and partners help traffic run smoothly in Madrid
IBM Systems Magazine, Mainframe - March/April 2017 - 23
IBM Systems Magazine, Mainframe - March/April 2017 - Trends: How to Improve Your Sales Skills: Tips for techies on showing the value of their services
IBM Systems Magazine, Mainframe - March/April 2017 - 25
IBM Systems Magazine, Mainframe - March/April 2017 - 26
IBM Systems Magazine, Mainframe - March/April 2017 - 27
IBM Systems Magazine, Mainframe - March/April 2017 - Feature: Strength in Collaboration: Linux on z Systems accelerates new and traditional workloads
IBM Systems Magazine, Mainframe - March/April 2017 - 29
IBM Systems Magazine, Mainframe - March/April 2017 - 30
IBM Systems Magazine, Mainframe - March/April 2017 - 31
IBM Systems Magazine, Mainframe - March/April 2017 - 32
IBM Systems Magazine, Mainframe - March/April 2017 - 33
IBM Systems Magazine, Mainframe - March/April 2017 - Feature: Community Computing: The Open Mainframe Project expands educational opportunities for Linux on z Systems users
IBM Systems Magazine, Mainframe - March/April 2017 - 35
IBM Systems Magazine, Mainframe - March/April 2017 - 36
IBM Systems Magazine, Mainframe - March/April 2017 - 37
IBM Systems Magazine, Mainframe - March/April 2017 - 38
IBM Systems Magazine, Mainframe - March/April 2017 - 39
IBM Systems Magazine, Mainframe - March/April 2017 - 40
IBM Systems Magazine, Mainframe - March/April 2017 - 41
IBM Systems Magazine, Mainframe - March/April 2017 - 42
IBM Systems Magazine, Mainframe - March/April 2017 - 43
IBM Systems Magazine, Mainframe - March/April 2017 - 44
IBM Systems Magazine, Mainframe - March/April 2017 - TECH Showcase: Shift-Left Testing Improves Success: Automated testing in the DevOps cycle improves quality and reduces risk
IBM Systems Magazine, Mainframe - March/April 2017 - 46
IBM Systems Magazine, Mainframe - March/April 2017 - 47
IBM Systems Magazine, Mainframe - March/April 2017 - 48
IBM Systems Magazine, Mainframe - March/April 2017 - 49
IBM Systems Magazine, Mainframe - March/April 2017 - Tech Corner: Database Development: IBM DB2 V12 enhances and integrates data for cloud, mobile and analytics
IBM Systems Magazine, Mainframe - March/April 2017 - 51
IBM Systems Magazine, Mainframe - March/April 2017 - 52
IBM Systems Magazine, Mainframe - March/April 2017 - 53
IBM Systems Magazine, Mainframe - March/April 2017 - 54
IBM Systems Magazine, Mainframe - March/April 2017 - Solutions: SMART TS XL V8.0, IN-COM Data Systems; Tubes, Macro 4; CleverView for TCP/IP on Linux V2.5, AES
IBM Systems Magazine, Mainframe - March/April 2017 - Stop Run: A Global View: Computer science and astrophysics prove a natural fit
IBM Systems Magazine, Mainframe - March/April 2017 - Cover3
IBM Systems Magazine, Mainframe - March/April 2017 - Cover4
IBM Systems Magazine, Mainframe - March/April 2017 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - March/April 2017 - 2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - March/April 2017 - SE2
IBM Systems Magazine, Mainframe - March/April 2017 - SE3
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20191112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/relevantz_20190102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/2019mfse
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20181112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/2018mfse
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20171112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170910_v2
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_sesupp
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_linuxsupp
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20161112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/MainframeSecurity
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20151112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150910_se
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150910
http://www.ibmsystemsmagmainframedigital.com/MFSkills
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150506_supp
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20141112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140910_v2
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_gt_201405
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/BigData
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20131112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130910_v2
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20121112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/buyersguide2013
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/ibmsystems_mainframe_2012bg
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20111112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20101112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100910_bg
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20091112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20090910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20090708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20090506
http://www.nxtbook.com/nxtbooks/ibmsystemsmag/mainframe_20090304
http://www.nxtbook.com/nxtbooks/mspcomm/ibmsystems_mainframe_200901
http://www.nxtbookMEDIA.com