IBM Systems Magazine, Power Systems - July 2014 - 39

in dramatic application-level
response time improvements in
real-world settings.
Do you have multiple
applications or servers that could
benefit from faster storage, or can
you realize significant savings by
reducing the number of scale-out
servers in your environment?
IBM FlashSystem technology
has I/O operations per second
(IOPS) capacity well beyond
the needs of most applications.
This performance scalability
makes it an ideal technology for
storage consolidation, multiple
applications within an image,
applications running across
multiple virtual machines in a
server, or multiple servers.
Could your data center benefit
from a reduced storage footprint,
lower energy and cooling
costs, and increased storage
performance? Considering the
I/O density, capacity (up to 40
TB RAID5), and energy and
footprint savings, FlashSystem
technology delivers amazing
efficiency in a 2U form factor. It's
an ideal solution to combat data
center sprawl-reducing energy
consumption and cooling costs
as well as increasing storage
performance capability.

Response Time and
IOPS Are Important
Advertising for flash products
emphasizes either IOPS or
response time. While a case can
be made for the value of either
metric, they are tightly related.
Response time represents how
long it takes to process an I/O.
The faster I/O gets processed,
the more work gets done. IOPS
is a measure of the throughput
achieved by the system, or its
throughput capacity.
Queuing theory says that the
number of items in the queue (Q)
divided by the average time per
item (t) results in the throughput of

the system (Q/t = throughput). For
example, a queue depth of 20 with
a response time of 5 milliseconds
equals 4,000 IOPS. If we assume
the system's capability to submit
work to the storage is a fixed
rate, then the most important
variable is response time. In the
example, if the queue remained
constant but the response time
decreased to 100 microseconds,
then throughput increases
correspondingly to 200,000 IOPS.
Assuming the system spends
a significant amount of time
processing I/O, the biggest impact
to application performance will
be made by lowering I/O response
time. FlashSystem technology
with MicroLatency capabilities
is designed to deliver industryleading response time. When a
process waits less time for data,
process performance can reach
levels faster than with manual
tuning. Would you rather your
development staff spent their
time deploying new software or
tuning performance?
IOPS capability is still important. While most applications
won't exhaust FlashSystem
throughput scalability, it's good
to know the performance is there
in case of increased demand,
or for supporting consolidation
through virtualization or storage
centralization.

All Metrics Are Not
Created Equal
Manufacturers tend to highlight
the boundary capabilities of their
products, which is good as long
as you understand what it means.
The response time numbers you'll
typically see for flash products
are for a single I/O operation or a
queue depth of one. Most realworld deployments will run with
queue depth somewhere between
five and 20. Why focus on a queue
depth of one? The best-case
response time will be observed

D

When paired
with
FlashSystem,
InfoSphere
Identity Insights
saw a

100x
performance
improvement and

24x
less rack space
than disk
consumption

Pairing
FlashSystem and
ProtecTIER saw

50%
better
price/
performance
than disk,

18x
less rack space
and a fraction of
the energy

with a single I/O operation. Queue
depths higher than one build on
that fundamental capability. As
IOPS increase, you want a design
that maintains low response
time. All storage products will
eventually see a rise in response
time as IOPS increase. The
advantage of the FlashSystem
design is how far it maintains
low response time as IOPS
increase, delivering consistent and
predictable performance.
The I/O operation where
flash excels the most is read
operations. Flash can deliver
the highest throughput (IOPS)
with 100 percent random reads
and the highest bandwidth
(gigabytes per second) with
100 percent sequential reads.
FlashSystem technology also
delivers impressive random and
sequential write performance.
In fact, random writes can
be accomplished at lower
latency than reads until write
management overheads come
into play (all flash products must
deal with garbage collection). In
reality, few workloads are 100
percent one flavor. Therefore,
the most important capability for

Learn More
Capitalizing on Smarter and Faster
Insight with Flash: IBM FlashSystem and
IBM InfoSphere Identity Insight
http://theedison.com/pdf/samples_IBM_
FlashSystem_Identity_Insight_WP.pdf
High Velocity Analytics Take the
Customer Experience to the Next Level:
IBM FlashSystem and IBM Tealeaf
http://theedison.com/pdf/samples_IBM_
FlashSystem_Tealeaf_WP.pdf
Protecting Information in a Smarter Data
Center with the Performance of Flash:
IBM FlashSystemT and IBM ProtecTIER
http://theedison.com/pdf/samples_IBM_
FlashSystem_ProtecTIER_WP.pdf

ibmsystemsmag.com JULY 2014 // 39


http://www.theedison.com/pdf/samples_IBM_FlashSystem_Identity_Insight_WP.pdf http://www.theedison.com/pdf/samples_IBM_FlashSystem_Tealeaf_WP.pdf http://www.theedison.com/pdf/samples_IBM_FlashSystem_ProtecTIER_WP.pdf http://www.ibmsystemsmag.com

IBM Systems Magazine, Power Systems - July 2014

Table of Contents for the Digital Edition of IBM Systems Magazine, Power Systems - July 2014

Table of Contents
Editor's Desk: Black thumb
IBM Perspective: Open innovation at its best
Techbits: Watson: your personal shopper
Partner PoV: Your business continuity strategy should focus on recovery, not just backups
Trends: IBM Design brings the best minds from engineering and design to create products that delight users
Cover Story: A Growing Proposition: Roundtable reveals Linux is flourishing on Power Systems
Feature: The Wave of the Future: IBM floods the Linux market with options
Tech Showcase: Why updating applications makes good business sense
Focus on Storage: IBM FlashSystem addresses storage and application performance issues
Open Source: Choosing the best proprietary or open-source applications
Solutions: Galileo Performance Explorer; Power Systems Navigator; X-Analysis V10; Robot/NETWORK Web UI; SafeNet/i 10.11; Reflection 2014; KeyesOverlay and kLink; RSF and RSF-HA 10.0
Snapshot: Randy Wittner
Reference Point - Global Events, Education, Resources for Power Systems
2014 Power Systems Solution Edition Product Index
IBM Systems Magazine, Power Systems - July 2014 - Intro
IBM Systems Magazine, Power Systems - July 2014 - Cover1
IBM Systems Magazine, Power Systems - July 2014 - Cover2
IBM Systems Magazine, Power Systems - July 2014 - 1
IBM Systems Magazine, Power Systems - July 2014 - Table of Contents
IBM Systems Magazine, Power Systems - July 2014 - 3
IBM Systems Magazine, Power Systems - July 2014 - 4
IBM Systems Magazine, Power Systems - July 2014 - Editor's Desk: Black thumb
IBM Systems Magazine, Power Systems - July 2014 - IBM Perspective: Open innovation at its best
IBM Systems Magazine, Power Systems - July 2014 - Techbits: Watson: your personal shopper
IBM Systems Magazine, Power Systems - July 2014 - Partner PoV: Your business continuity strategy should focus on recovery, not just backups
IBM Systems Magazine, Power Systems - July 2014 - 9
IBM Systems Magazine, Power Systems - July 2014 - Trends: IBM Design brings the best minds from engineering and design to create products that delight users
IBM Systems Magazine, Power Systems - July 2014 - 11
IBM Systems Magazine, Power Systems - July 2014 - 12
IBM Systems Magazine, Power Systems - July 2014 - 13
IBM Systems Magazine, Power Systems - July 2014 - Cover Story: A Growing Proposition: Roundtable reveals Linux is flourishing on Power Systems
IBM Systems Magazine, Power Systems - July 2014 - 15
IBM Systems Magazine, Power Systems - July 2014 - 16
IBM Systems Magazine, Power Systems - July 2014 - 17
IBM Systems Magazine, Power Systems - July 2014 - 18
IBM Systems Magazine, Power Systems - July 2014 - 19
IBM Systems Magazine, Power Systems - July 2014 - Feature: The Wave of the Future: IBM floods the Linux market with options
IBM Systems Magazine, Power Systems - July 2014 - 21
IBM Systems Magazine, Power Systems - July 2014 - 22
IBM Systems Magazine, Power Systems - July 2014 - 23
IBM Systems Magazine, Power Systems - July 2014 - 24
IBM Systems Magazine, Power Systems - July 2014 - 25
IBM Systems Magazine, Power Systems - July 2014 - 26
IBM Systems Magazine, Power Systems - July 2014 - Tech Showcase: Why updating applications makes good business sense
IBM Systems Magazine, Power Systems - July 2014 - 28
IBM Systems Magazine, Power Systems - July 2014 - 29
IBM Systems Magazine, Power Systems - July 2014 - 30
IBM Systems Magazine, Power Systems - July 2014 - 31
IBM Systems Magazine, Power Systems - July 2014 - 32
IBM Systems Magazine, Power Systems - July 2014 - 33
IBM Systems Magazine, Power Systems - July 2014 - 34
IBM Systems Magazine, Power Systems - July 2014 - 35
IBM Systems Magazine, Power Systems - July 2014 - 36
IBM Systems Magazine, Power Systems - July 2014 - 37
IBM Systems Magazine, Power Systems - July 2014 - Focus on Storage: IBM FlashSystem addresses storage and application performance issues
IBM Systems Magazine, Power Systems - July 2014 - 39
IBM Systems Magazine, Power Systems - July 2014 - 40
IBM Systems Magazine, Power Systems - July 2014 - 41
IBM Systems Magazine, Power Systems - July 2014 - Open Source: Choosing the best proprietary or open-source applications
IBM Systems Magazine, Power Systems - July 2014 - 43
IBM Systems Magazine, Power Systems - July 2014 - 44
IBM Systems Magazine, Power Systems - July 2014 - Solutions: Galileo Performance Explorer; Power Systems Navigator; X-Analysis V10; Robot/NETWORK Web UI; SafeNet/i 10.11; Reflection 2014; KeyesOverlay and kLink; RSF and RSF-HA 10.0
IBM Systems Magazine, Power Systems - July 2014 - 46
IBM Systems Magazine, Power Systems - July 2014 - 47
IBM Systems Magazine, Power Systems - July 2014 - Snapshot: Randy Wittner
IBM Systems Magazine, Power Systems - July 2014 - Cover3
IBM Systems Magazine, Power Systems - July 2014 - Cover4
IBM Systems Magazine, Power Systems - July 2014 - Reference Point - Global Events, Education, Resources for Power Systems
IBM Systems Magazine, Power Systems - July 2014 - 2014 Power Systems Solution Edition Product Index
IBM Systems Magazine, Power Systems - July 2014 - SE2
IBM Systems Magazine, Power Systems - July 2014 - SE3
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