IBM Systems magazine, IBM Z - May/June 2020 - 38

T EC HBITS

Multitier Applications
On x86 and other distributed
platforms, the program and the
data are typically run on different OS images. This is achieved
by running application servers
and database servers, resulting
in a two- or multitier application.
Separating the two components
creates a requirement for the tiers
to communicate through a
network connection.

Response Time, Unique
File Structure and More
Network connections add
latency to the response time and
throughput of running workloads,
which can be as much as 40%
for a single application flow. This
also adds a requirement to run

additional network instructions,
which isn't required with a
single-tier application. This
requirement is applicable to
both the application servers and
database servers.
Additionally, unique file
structures exist on z/OS that
aren't supported on other
platforms that could make
conversion and migration
difficult-possibly requiring
application modification and
re-engineering. Some examples
of this are VSAM and PDS/E files
that don't have counterparts on
any other platform. There are also
system exits used for auditing
and accounting purposes that
don't exist, along with many
unique program products that

are leveraged within the actual
applications.

Make an Informed Decision
Networking, latency implications
and z/OS unique attributes must
be taken into consideration when
evaluating z/OS applications as
potential candidates for conversion to cloud applications. Failure
to do so can create problems with
scaling and meeting existing SLAs.
Additional hardware and software
can help, but they can add to the
total cost of operations and don't
necessarily guarantee the same
SLA results. Before moving a
single-tier application to a multitier architecture, it's important
to examine workload activity and
business requirements.

August 2-7, 2020

Join us this summer!
The educational content in Boston will highlight Open Source for Z and also cover topics
such as Data Privacy, Security and Compliance, Cloud Technology, DevOps, and IBM Z®.
Visit event.share.org to learn more, see the agenda and access
justification resources. Register

by June 19 to save!

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IBM Systems magazine, IBM Z - May/June 2020

Table of Contents for the Digital Edition of IBM Systems magazine, IBM Z - May/June 2020

Table of Contents
Editor's Desk: Enabling your success in a hybrid multicloud world
Currents: Arvind Krishna elected IBM CEO, James Whitehurst elected president
Currents: Solutions
Currents: Sustainable battery composition
Currents: The next generation of IBMers on why IBM Z is relevant
Currents: Women in IT value community and mentorship
Currents: A call to all Canadian mainframers
Partner POV: Develop an effective package management strategy to streamline DevOps
Cover Story: Meet the New IBM z15 and IBM LinuxONE III Models: The latest air-cooled systems can help enhance resiliency, security and availability in a hybrid cloud world
The Business Value of the Transformative IBM Z Platform How Feature 1: The Business Value of the Transformative IBM Z Platform: How IBM Z provides tools and capabilities for digital transformation
TECH Showcase: The IBM DS8900F family of flash storage systems provides improved encryption, disaster recovery, uptime and scalability
Techbits: Linux on IBM Z and IBM LinuxONE: When to use SCSI versus DASD storage
Techbits: Application tier considerations for moving to the cloud or x86
Techbits: Ask the expert: How can I reduce risk when performing an IBM Z hardware upgrade?
Beyond the Box: IBMer David Hilliard on his role as a locomotive engineer for the Catskill Mountain Railroad
IBM Systems magazine, IBM Z - May/June 2020 - Intro
IBM Systems magazine, IBM Z - May/June 2020 - Table of Contents
IBM Systems magazine, IBM Z - May/June 2020 - Cover2
IBM Systems magazine, IBM Z - May/June 2020 - 1
IBM Systems magazine, IBM Z - May/June 2020 - 2
IBM Systems magazine, IBM Z - May/June 2020 - 3
IBM Systems magazine, IBM Z - May/June 2020 - 4
IBM Systems magazine, IBM Z - May/June 2020 - 5
IBM Systems magazine, IBM Z - May/June 2020 - Editor's Desk: Enabling your success in a hybrid multicloud world
IBM Systems magazine, IBM Z - May/June 2020 - 7
IBM Systems magazine, IBM Z - May/June 2020 - Currents: Solutions
IBM Systems magazine, IBM Z - May/June 2020 - Currents: The next generation of IBMers on why IBM Z is relevant
IBM Systems magazine, IBM Z - May/June 2020 - Currents: Women in IT value community and mentorship
IBM Systems magazine, IBM Z - May/June 2020 - 11
IBM Systems magazine, IBM Z - May/June 2020 - 12
IBM Systems magazine, IBM Z - May/June 2020 - 13
IBM Systems magazine, IBM Z - May/June 2020 - Currents: A call to all Canadian mainframers
IBM Systems magazine, IBM Z - May/June 2020 - 15
IBM Systems magazine, IBM Z - May/June 2020 - Partner POV: Develop an effective package management strategy to streamline DevOps
IBM Systems magazine, IBM Z - May/June 2020 - 17
IBM Systems magazine, IBM Z - May/June 2020 - Cover Story: Meet the New IBM z15 and IBM LinuxONE III Models: The latest air-cooled systems can help enhance resiliency, security and availability in a hybrid cloud world
IBM Systems magazine, IBM Z - May/June 2020 - 19
IBM Systems magazine, IBM Z - May/June 2020 - 20
IBM Systems magazine, IBM Z - May/June 2020 - 21
IBM Systems magazine, IBM Z - May/June 2020 - 22
IBM Systems magazine, IBM Z - May/June 2020 - 23
IBM Systems magazine, IBM Z - May/June 2020 - The Business Value of the Transformative IBM Z Platform How Feature 1: The Business Value of the Transformative IBM Z Platform: How IBM Z provides tools and capabilities for digital transformation
IBM Systems magazine, IBM Z - May/June 2020 - 25
IBM Systems magazine, IBM Z - May/June 2020 - 26
IBM Systems magazine, IBM Z - May/June 2020 - 27
IBM Systems magazine, IBM Z - May/June 2020 - 28
IBM Systems magazine, IBM Z - May/June 2020 - TECH Showcase: The IBM DS8900F family of flash storage systems provides improved encryption, disaster recovery, uptime and scalability
IBM Systems magazine, IBM Z - May/June 2020 - 30
IBM Systems magazine, IBM Z - May/June 2020 - 31
IBM Systems magazine, IBM Z - May/June 2020 - 32
IBM Systems magazine, IBM Z - May/June 2020 - 33
IBM Systems magazine, IBM Z - May/June 2020 - 34
IBM Systems magazine, IBM Z - May/June 2020 - Techbits: Linux on IBM Z and IBM LinuxONE: When to use SCSI versus DASD storage
IBM Systems magazine, IBM Z - May/June 2020 - 36
IBM Systems magazine, IBM Z - May/June 2020 - Techbits: Application tier considerations for moving to the cloud or x86
IBM Systems magazine, IBM Z - May/June 2020 - 38
IBM Systems magazine, IBM Z - May/June 2020 - Techbits: Ask the expert: How can I reduce risk when performing an IBM Z hardware upgrade?
IBM Systems magazine, IBM Z - May/June 2020 - Beyond the Box: IBMer David Hilliard on his role as a locomotive engineer for the Catskill Mountain Railroad
IBM Systems magazine, IBM Z - May/June 2020 - Cover3
IBM Systems magazine, IBM Z - May/June 2020 - Cover4
IBM Systems magazine, IBM Z - May/June 2020 - SD
IBM Systems magazine, IBM Z - May/June 2020 - CoverSD1
IBM Systems magazine, IBM Z - May/June 2020 - CoverSD2
IBM Systems magazine, IBM Z - May/June 2020 - SD1
IBM Systems magazine, IBM Z - May/June 2020 - SD2
IBM Systems magazine, IBM Z - May/June 2020 - SD3
IBM Systems magazine, IBM Z - May/June 2020 - SD4
IBM Systems magazine, IBM Z - May/June 2020 - CT1
IBM Systems magazine, IBM Z - May/June 2020 - CT2
IBM Systems magazine, IBM Z - May/June 2020 - SD5
IBM Systems magazine, IBM Z - May/June 2020 - SD6
IBM Systems magazine, IBM Z - May/June 2020 - SD7
IBM Systems magazine, IBM Z - May/June 2020 - SD8
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IBM Systems magazine, IBM Z - May/June 2020 - SD22
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IBM Systems magazine, IBM Z - May/June 2020 - SD25
IBM Systems magazine, IBM Z - May/June 2020 - SD26
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IBM Systems magazine, IBM Z - May/June 2020 - SD41
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IBM Systems magazine, IBM Z - May/June 2020 - SD43
IBM Systems magazine, IBM Z - May/June 2020 - SD44
IBM Systems magazine, IBM Z - May/June 2020 - SD45
IBM Systems magazine, IBM Z - May/June 2020 - SD46
IBM Systems magazine, IBM Z - May/June 2020 - SD47
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IBM Systems magazine, IBM Z - May/June 2020 - SD50
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IBM Systems magazine, IBM Z - May/June 2020 - SD56
IBM Systems magazine, IBM Z - May/June 2020 - CoverSD3
IBM Systems magazine, IBM Z - May/June 2020 - CoverSD4
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