IBM Systems Magazine, Mainframe - July/August 2012 - 44

Tech Corner
were chosen to represent the range available in IBM servers. Figure 1 (below) shows the zEnterprise* System has fewer but faster threads and more cache than the others. Because of four-way symmetric multithreading (SMT4) and the ability to share Level 3 cache even when cores are disabled, Power Systems* Enterprise servers span from turbo machines approaching System z* servers to the maximum-threads Power* 780, which is positioned near the blades in thread count. Note that even within the Power 780, machine cache and speed must be swapped to gain thread count. Because of packaging, cooling and economics, the PureSystems* compute nodes and blades run at lower speed but retain the cache and thread count of the POWER7* socket. The Intel* machines are positioned near the fully threaded Power machines but have lower thread count because they have two threads per core instead of four.

A Fool’s Errand The definition of capacity and performance by the observer will affect the perception of relative capacity for these machines. Workloads can stress all three axes of this space. Thus, benchmark-based Figure 1 performance metrics can Positioning Compute Nodes in Fitness Space never be universally valid. Bubble Size Is Thread Count This renders the reliance on standard benchmarks to 1 generate a common metric, seemingly a fool’s errand. 0.8 It’s important to z196 Book 0.6 understand the common Intel Comp Node 0.4 practice of sizing servers 0.2 Power Compute Node other than System z using 0 Enterprise Power Node metrics such as Transaction 0 0.2 0.4 0.6 0.8 1 Processing Performance Council-Type C (TPC-C), CACHE/THREAD Standard Performance Evaluation Corporation This bubble chart shows how servers are positioned in the Fitness Space. Based on Integers (SPECint), Relative Performance (rPerf ) and IDEAS International Relative Performance Table 1 Estimates (RPEs), which are only good when comparing machines at IBM Server Specifications similar positions on the [&OUFSQSJTFÁ$FOUSBMÁ1SPDFTTJOHÁ$PNQMFYÁ tÁ!ÁDPSFÁ"Á()[Á %!Á.#Á-!ÁTIBSFÁ[&# Figure 1 chart. For this reason, IBM stopped using [#9Á1PXFSÁ#MBEFÁ tÁ%ÁDPSFÁ Á()[Á Á.#Á- Á108&3$ these raw metrics to measure System z performance long [#9Á*OUFMÁ#MBEFÁ tÁÁDPSFÁ!Á()[Á .#Á- Á8FTUNFSF ago. Instead, a floating IDEAS International 1VSF4ZTUFNTÁ1PXFSÁ$PNQVUFÁ/PEFÁ tÁ%ÁDPSFÁ !Á()[Á .#Á- Á108&3$ RPE per multiprocessor 1VSF4ZTUFNTÁ*OUFMÁ$PNQVUFÁ/PEFÁ tÁ%ÁDPSFÁ$Á()[ÁÁ.#Á- Á4BOEZÁ#SJEHF specification (MPS) ratio, based on workload factors, .BYÁ5ISFBETÁ&OUFSQSJTFÁ1PXFSÁ tÁ%ÁDPSFÁ !!Á()[Á Á.#Á- Á108&3$ has been used by System z for more than a decade. .BYÁ$BDIFÁ&OUFSQSJTFÁ1PXFSÁ tÁ!ÁDPSFÁ!Á()[Á Á.#Á- Á108&3$ Because of the spread across Figure 1, Power
THREAD SPEED

44 22

J U LY/AU G U S T 2 0 12

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IBM Systems Magazine, Mainframe - July/August 2012

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - July/August 2012

Editor's Desk: The Taste of Success
Dashboard: Pay by Phone - Current Conditions - Work Without Boundaries - Digital Personalities
IBM Perspective: The Performance of Many, the Efficiency of One
Trends: Why zBX Outperforms DIY When Deploying a Hybrid Infrastructure
Q&A: Accurate TCO Analysis Demonstrates the True Value of System z
IT Today: IBM's Integrated Solution for System z Streamlines Software Delivery
Case Study: Taking Shelter From the Storm: Shelter Insurance employs a measured approach in adopting Linux on zEnterprise 114
Cover Story: Internal Transformation: System z is at the center of initiative, which has saved the company $100 million so far
Feature: Large Memory Tames Big Data: The System z stack evolves to deliver business value from more memory
Tech Corner: A More Effective Comparison Starts With Relative Capacity
Administrator: JES2 Helps Expedite the Relocation of Data Volumes
Solutions: Double-Take Share 5.0 - Vanguard Security and Compliance Solutions - MegaCryption DB - ASG-TMON for DB2 - Reflection Suite for X - Orchestrated IT
Advertiser's Index
Stop Run: Wreck Diving Brings IBMer Face to Face With Lost History
Reference Point - Global Events, Education, Resources for Mainframe
IB Tape Storage
IBM Systems Magazine, Mainframe - July/August 2012 - Intro
IBM Systems Magazine, Mainframe - July/August 2012 - Cover1
IBM Systems Magazine, Mainframe - July/August 2012 - Cover2
IBM Systems Magazine, Mainframe - July/August 2012 - 1
IBM Systems Magazine, Mainframe - July/August 2012 - 2
IBM Systems Magazine, Mainframe - July/August 2012 - 3
IBM Systems Magazine, Mainframe - July/August 2012 - 4
IBM Systems Magazine, Mainframe - July/August 2012 - 5
IBM Systems Magazine, Mainframe - July/August 2012 - Editor's Desk: The Taste of Success
IBM Systems Magazine, Mainframe - July/August 2012 - 7
IBM Systems Magazine, Mainframe - July/August 2012 - Dashboard: Pay by Phone - Current Conditions - Work Without Boundaries - Digital Personalities
IBM Systems Magazine, Mainframe - July/August 2012 - IBM Perspective: The Performance of Many, the Efficiency of One
IBM Systems Magazine, Mainframe - July/August 2012 - Trends: Why zBX Outperforms DIY When Deploying a Hybrid Infrastructure
IBM Systems Magazine, Mainframe - July/August 2012 - 11
IBM Systems Magazine, Mainframe - July/August 2012 - 12
IBM Systems Magazine, Mainframe - July/August 2012 - 13
IBM Systems Magazine, Mainframe - July/August 2012 - 14
IBM Systems Magazine, Mainframe - July/August 2012 - 15
IBM Systems Magazine, Mainframe - July/August 2012 - Q&A: Accurate TCO Analysis Demonstrates the True Value of System z
IBM Systems Magazine, Mainframe - July/August 2012 - 17
IBM Systems Magazine, Mainframe - July/August 2012 - 18
IBM Systems Magazine, Mainframe - July/August 2012 - 19
IBM Systems Magazine, Mainframe - July/August 2012 - 20
IBM Systems Magazine, Mainframe - July/August 2012 - 21
IBM Systems Magazine, Mainframe - July/August 2012 - IT Today: IBM's Integrated Solution for System z Streamlines Software Delivery
IBM Systems Magazine, Mainframe - July/August 2012 - 23
IBM Systems Magazine, Mainframe - July/August 2012 - 24
IBM Systems Magazine, Mainframe - July/August 2012 - 25
IBM Systems Magazine, Mainframe - July/August 2012 - Case Study: Taking Shelter From the Storm: Shelter Insurance employs a measured approach in adopting Linux on zEnterprise 114
IBM Systems Magazine, Mainframe - July/August 2012 - 27
IBM Systems Magazine, Mainframe - July/August 2012 - 28
IBM Systems Magazine, Mainframe - July/August 2012 - 29
IBM Systems Magazine, Mainframe - July/August 2012 - 30
IBM Systems Magazine, Mainframe - July/August 2012 - 31
IBM Systems Magazine, Mainframe - July/August 2012 - Cover Story: Internal Transformation: System z is at the center of initiative, which has saved the company $100 million so far
IBM Systems Magazine, Mainframe - July/August 2012 - 33
IBM Systems Magazine, Mainframe - July/August 2012 - 34
IBM Systems Magazine, Mainframe - July/August 2012 - 35
IBM Systems Magazine, Mainframe - July/August 2012 - 36
IBM Systems Magazine, Mainframe - July/August 2012 - 37
IBM Systems Magazine, Mainframe - July/August 2012 - Feature: Large Memory Tames Big Data: The System z stack evolves to deliver business value from more memory
IBM Systems Magazine, Mainframe - July/August 2012 - 39
IBM Systems Magazine, Mainframe - July/August 2012 - 40
IBM Systems Magazine, Mainframe - July/August 2012 - 41
IBM Systems Magazine, Mainframe - July/August 2012 - 42
IBM Systems Magazine, Mainframe - July/August 2012 - Tech Corner: A More Effective Comparison Starts With Relative Capacity
IBM Systems Magazine, Mainframe - July/August 2012 - 44
IBM Systems Magazine, Mainframe - July/August 2012 - 45
IBM Systems Magazine, Mainframe - July/August 2012 - 46
IBM Systems Magazine, Mainframe - July/August 2012 - 47
IBM Systems Magazine, Mainframe - July/August 2012 - Administrator: JES2 Helps Expedite the Relocation of Data Volumes
IBM Systems Magazine, Mainframe - July/August 2012 - 49
IBM Systems Magazine, Mainframe - July/August 2012 - 50
IBM Systems Magazine, Mainframe - July/August 2012 - 51
IBM Systems Magazine, Mainframe - July/August 2012 - Solutions: Double-Take Share 5.0 - Vanguard Security and Compliance Solutions - MegaCryption DB - ASG-TMON for DB2 - Reflection Suite for X - Orchestrated IT
IBM Systems Magazine, Mainframe - July/August 2012 - 53
IBM Systems Magazine, Mainframe - July/August 2012 - Advertiser's Index
IBM Systems Magazine, Mainframe - July/August 2012 - Stop Run: Wreck Diving Brings IBMer Face to Face With Lost History
IBM Systems Magazine, Mainframe - July/August 2012 - 56
IBM Systems Magazine, Mainframe - July/August 2012 - Cover3
IBM Systems Magazine, Mainframe - July/August 2012 - Cover4
IBM Systems Magazine, Mainframe - July/August 2012 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - July/August 2012 - BG1
IBM Systems Magazine, Mainframe - July/August 2012 - BG2
IBM Systems Magazine, Mainframe - July/August 2012 - IB Tape Storage
IBM Systems Magazine, Mainframe - July/August 2012 - T2
IBM Systems Magazine, Mainframe - July/August 2012 - T3
IBM Systems Magazine, Mainframe - July/August 2012 - T4
IBM Systems Magazine, Mainframe - July/August 2012 - T5
IBM Systems Magazine, Mainframe - July/August 2012 - T6
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