IBM Systems Magazine, Mainframe - January/February 2017 - 15

FOCUS ON STORAGE

Storage in a FLASH
Improve performance and efficiency with hybrid and all-fl ash storage

T

he storage industry is seeing a transition from traditional HDD to SSD using
NAND flash technology. Adoption of this technology for high-performance
transactional systems has reached a tipping point. Many z/OS* clients benefit
from performance and efficiency gains by implementing flash storage.
Nick Clayton
is an ex ecutive
IT specialist and
solution architect for DS8 0 0 0
development,
IBM Systems.

The IBM DS8000* family
includes both the all-flash
DS8888, and hybrid DS8884
and DS8886 systems; this article
describes the options available and
provides tips for effective planning and implementation. It also
outlines the differences between
z/OS and distributed systems, and
how other IBM z Systems* technologies-such as zEnterprise* Data
Compression (zEDC)-complement
the use of flash storage.

Many Benefits
Flash provides significant latency
improvements compared with

traditional HDDs. However, it's
still slower than dynamic random
access memory, so read and write
cache provide significant benefits. Write cache helps coalesce
and avoid repeated writes from
unnecessarily wearing out the
flash media. The Intelligent
Write Caching algorithms on
the DS8000 storage developed
by IBM Research consider both
temporal and spatial locality to
minimize wear on the flash.
Flash can also sustain significantly higher random I/O
throughput than traditional HDDs.
Flash-optimized hardware, such

as the high-performance flash
enclosure in the DS8000 family, is
important to ensure RAID systems
designed for HDD don't become
a bottleneck when using flash.
However, in most cases, applications aren't actually driving the
maximum random I/O throughput
in flash environments but are still
significantly above what's possible
with traditional HDDs.
Equally important to z/OS
environments is good sequential
performance for batch workloads. Modern flash media are
significantly superior to earlier
generation technology in this

ibmsystemsmag.com JANUARY/FEBRUARY 2017 // 15


http://www.ibmsystemsmag.com

IBM Systems Magazine, Mainframe - January/February 2017

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - January/February 2017

Table of Contents
Editor's Desk: Loads of Options
Techbits:
Infographic: Your Route to Digital Innovation
Partner PoV: Ignite Innovation: Optimize Linux on z Systems with adaptation, analytics and collaboration
Currents: Great Gains: Hybrid cloud adopters gain competitve advantages
Focus on Storage: Storage in a Flash: Improve performance and efficiency with hybrid and all-flash storage
Cover Story: Mainframe Options: IBM z Systems supports modern languages, tools, optimization and processes
Feature: Unleash Business Applications: IBM Application Discovery unlocks new value and accelerates the adoption of hybrid cloud solutions
Tech Trends: What Keeps IT Leaders Up at Night? Cloud computing is cited as top priority
Tech Corner: Healthy Status: z/OS Health Checker features productivity and ease-of-use enhancements
Solutions: BoxScore II, H&W Computer Systems; CleverView for TCP/IP V9.1, AES; ISPW Deploy, Compuware
Stop Run: Data Points to Love: IBMer combines marketing, technology expertise to help others navigate online dating
Reference Point - Global Events, Education, Resources for Mainframe
2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - January/February 2017 - Intro
IBM Systems Magazine, Mainframe - January/February 2017 - Cover1
IBM Systems Magazine, Mainframe - January/February 2017 - Cover2
IBM Systems Magazine, Mainframe - January/February 2017 - 1
IBM Systems Magazine, Mainframe - January/February 2017 - Table of Contents
IBM Systems Magazine, Mainframe - January/February 2017 - 3
IBM Systems Magazine, Mainframe - January/February 2017 - 4
IBM Systems Magazine, Mainframe - January/February 2017 - 5
IBM Systems Magazine, Mainframe - January/February 2017 - Editor's Desk: Loads of Options
IBM Systems Magazine, Mainframe - January/February 2017 - 7
IBM Systems Magazine, Mainframe - January/February 2017 - Techbits:
IBM Systems Magazine, Mainframe - January/February 2017 - Infographic: Your Route to Digital Innovation
IBM Systems Magazine, Mainframe - January/February 2017 - Partner PoV: Ignite Innovation: Optimize Linux on z Systems with adaptation, analytics and collaboration
IBM Systems Magazine, Mainframe - January/February 2017 - 11
IBM Systems Magazine, Mainframe - January/February 2017 - Currents: Great Gains: Hybrid cloud adopters gain competitve advantages
IBM Systems Magazine, Mainframe - January/February 2017 - 13
IBM Systems Magazine, Mainframe - January/February 2017 - 14
IBM Systems Magazine, Mainframe - January/February 2017 - Focus on Storage: Storage in a Flash: Improve performance and efficiency with hybrid and all-flash storage
IBM Systems Magazine, Mainframe - January/February 2017 - 16
IBM Systems Magazine, Mainframe - January/February 2017 - 17
IBM Systems Magazine, Mainframe - January/February 2017 - Cover Story: Mainframe Options: IBM z Systems supports modern languages, tools, optimization and processes
IBM Systems Magazine, Mainframe - January/February 2017 - 19
IBM Systems Magazine, Mainframe - January/February 2017 - 20
IBM Systems Magazine, Mainframe - January/February 2017 - 21
IBM Systems Magazine, Mainframe - January/February 2017 - 22
IBM Systems Magazine, Mainframe - January/February 2017 - Feature: Unleash Business Applications: IBM Application Discovery unlocks new value and accelerates the adoption of hybrid cloud solutions
IBM Systems Magazine, Mainframe - January/February 2017 - 24
IBM Systems Magazine, Mainframe - January/February 2017 - 25
IBM Systems Magazine, Mainframe - January/February 2017 - 26
IBM Systems Magazine, Mainframe - January/February 2017 - 27
IBM Systems Magazine, Mainframe - January/February 2017 - Tech Trends: What Keeps IT Leaders Up at Night? Cloud computing is cited as top priority
IBM Systems Magazine, Mainframe - January/February 2017 - 29
IBM Systems Magazine, Mainframe - January/February 2017 - 30
IBM Systems Magazine, Mainframe - January/February 2017 - 31
IBM Systems Magazine, Mainframe - January/February 2017 - Tech Corner: Healthy Status: z/OS Health Checker features productivity and ease-of-use enhancements
IBM Systems Magazine, Mainframe - January/February 2017 - 33
IBM Systems Magazine, Mainframe - January/February 2017 - 34
IBM Systems Magazine, Mainframe - January/February 2017 - 35
IBM Systems Magazine, Mainframe - January/February 2017 - 36
IBM Systems Magazine, Mainframe - January/February 2017 - 37
IBM Systems Magazine, Mainframe - January/February 2017 - Solutions: BoxScore II, H&W Computer Systems; CleverView for TCP/IP V9.1, AES; ISPW Deploy, Compuware
IBM Systems Magazine, Mainframe - January/February 2017 - 39
IBM Systems Magazine, Mainframe - January/February 2017 - Stop Run: Data Points to Love: IBMer combines marketing, technology expertise to help others navigate online dating
IBM Systems Magazine, Mainframe - January/February 2017 - Cover3
IBM Systems Magazine, Mainframe - January/February 2017 - Cover4
IBM Systems Magazine, Mainframe - January/February 2017 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - January/February 2017 - SE
IBM Systems Magazine, Mainframe - January/February 2017 - 2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - January/February 2017 - SE2
IBM Systems Magazine, Mainframe - January/February 2017 - SE3
IBM Systems Magazine, Mainframe - January/February 2017 - SE4
IBM Systems Magazine, Mainframe - January/February 2017 - SE5
IBM Systems Magazine, Mainframe - January/February 2017 - SE6
IBM Systems Magazine, Mainframe - January/February 2017 - SE7
IBM Systems Magazine, Mainframe - January/February 2017 - SE8
IBM Systems Magazine, Mainframe - January/February 2017 - SE9
IBM Systems Magazine, Mainframe - January/February 2017 - SE10
IBM Systems Magazine, Mainframe - January/February 2017 - SE11
IBM Systems Magazine, Mainframe - January/February 2017 - SE12
IBM Systems Magazine, Mainframe - January/February 2017 - SE13
IBM Systems Magazine, Mainframe - January/February 2017 - SE14
IBM Systems Magazine, Mainframe - January/February 2017 - SE15
IBM Systems Magazine, Mainframe - January/February 2017 - SE16
IBM Systems Magazine, Mainframe - January/February 2017 - SE17
IBM Systems Magazine, Mainframe - January/February 2017 - SE18
IBM Systems Magazine, Mainframe - January/February 2017 - SE19
IBM Systems Magazine, Mainframe - January/February 2017 - SE20
IBM Systems Magazine, Mainframe - January/February 2017 - SE21
IBM Systems Magazine, Mainframe - January/February 2017 - SE22
IBM Systems Magazine, Mainframe - January/February 2017 - SE23
IBM Systems Magazine, Mainframe - January/February 2017 - SE24
IBM Systems Magazine, Mainframe - January/February 2017 - SE25
IBM Systems Magazine, Mainframe - January/February 2017 - SE26
IBM Systems Magazine, Mainframe - January/February 2017 - SE27
IBM Systems Magazine, Mainframe - January/February 2017 - SE28
IBM Systems Magazine, Mainframe - January/February 2017 - SE29
IBM Systems Magazine, Mainframe - January/February 2017 - SE30
IBM Systems Magazine, Mainframe - January/February 2017 - SE31
IBM Systems Magazine, Mainframe - January/February 2017 - SE32
IBM Systems Magazine, Mainframe - January/February 2017 - SE33
IBM Systems Magazine, Mainframe - January/February 2017 - SE34
IBM Systems Magazine, Mainframe - January/February 2017 - SE35
IBM Systems Magazine, Mainframe - January/February 2017 - SE36
IBM Systems Magazine, Mainframe - January/February 2017 - SE37
IBM Systems Magazine, Mainframe - January/February 2017 - SE38
IBM Systems Magazine, Mainframe - January/February 2017 - SE39
IBM Systems Magazine, Mainframe - January/February 2017 - SE40
IBM Systems Magazine, Mainframe - January/February 2017 - SE41
IBM Systems Magazine, Mainframe - January/February 2017 - SE42
IBM Systems Magazine, Mainframe - January/February 2017 - SE43
IBM Systems Magazine, Mainframe - January/February 2017 - SE44
IBM Systems Magazine, Mainframe - January/February 2017 - SE45
IBM Systems Magazine, Mainframe - January/February 2017 - SE46
IBM Systems Magazine, Mainframe - January/February 2017 - SE47
IBM Systems Magazine, Mainframe - January/February 2017 - SE48
IBM Systems Magazine, Mainframe - January/February 2017 - SE49
IBM Systems Magazine, Mainframe - January/February 2017 - SE50
IBM Systems Magazine, Mainframe - January/February 2017 - SE51
IBM Systems Magazine, Mainframe - January/February 2017 - SE52
IBM Systems Magazine, Mainframe - January/February 2017 - SE53
IBM Systems Magazine, Mainframe - January/February 2017 - SE54
IBM Systems Magazine, Mainframe - January/February 2017 - SE55
IBM Systems Magazine, Mainframe - January/February 2017 - SE56
http://www.ibmsystemsmagmainframedigital.com/mspcomm/ibmsystemsmag/ibmsystems_mainframe_20200910
http://www.ibmsystemsmagmainframedigital.com/mspcomm/ibmsystemsmag/ibmsystems_mainframe_20200708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20200506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20200304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20200102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/2020mfse
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
https://www.nxtbook.com/nxtbooks/ibmsystemsmag/mainframe_20090304
https://www.nxtbookmedia.com