IBM Systems Magazine, Mainframe Edition - November/December 2012 - 33

sequence of instructions (e.g., updating an entry in a shared table) be executed as a transaction. The hardware will buffer the results from this sequence, keeping them from being observed by other processors, and will monitor any activity by other processors that could affect the results of this sequence. If all of the operations inside a transaction can be done without detecting any conflicts, the results will be made visible to others; otherwise, the results are thrown out and the software process can retry or use a traditional locking algorithm. In this way, the hardware maintains the all-or-nothing characteristic of transactions: Either the whole transaction appears to happen as one atomic operation, or none of it appears to happen. In most applications where shared data structures are rarely contented, transactional memory allows parallel programs to selectively avoid semaphore usage and realize multiprocessor benefits without suffering from lock-based overheads. As this capability is exploited across the System z software stack, it will enable new levels of multiprocessor scaling.

Master Inventor C. Kevin Shum is a senior technical staff member in IBM Poughkeepsie’s System and Technology Group. He has worked in the development of many System z microprocessors since joining IBM in 1988.

IBM Fellow Charles Webb has been with IBM in Poughkeepsie, N.Y., since 1983 and has worked on processor performance analysis, processor design and system design, all on the IBM mainframe platform.

WEBINAR

Hey! Who Closed My Batch Window?
Streamline and Assimilate Batch Processing into a World that Never Sleeps
WHO SHOULD ATTEND:
Architects, developers, system programmers, application programmers, IT managers and business managers

WHEN: November 7, 2012, 8 am PT/10 am CT/11 am ET AGENDA:
Our experts will discuss how the Java™ batch features provided by the IBM® WebSphere® Application Server delivers the capabilities needed to blur the line between online and batch processing, enabling organizations to realize the benefits of concurrent execution, shared business logic, and enterprise integration. Topics Include: s !DDRESSING SHRINKING BATCH PROCESSING WINDOWS WHILE MAINTAINING AN “always on” responsiveness to online transactions s &OCUSING ON SHARED SERVICES ACROSS BATCH AND ONLINE APPLICATIONS TO enable optimal resource utilization and business flexibility s 2EDUCING THE COST OF RUNNING BATCH ON THE MAINFRAME BY OFmOADING BATCH WORKLOAD TO SPECIALTY PROCESSORS s 5TILIZING UNUSED CAPACITY BY LEVERAGING ONLINE PROCESSING OF BULK DATA

Speed and Performance As mentioned, the zEC12 microprocessor will run at an ultrahigh frequency of 5.5 GHz, beating the z196 microprocessor, which previously had been the world’s fastest. By incorporating larger but shorterlatency L2 caches and various design improvements backed by a generous increase in system-level caches, the zEC12 processing capability is greatly improved. With more microprocessors in the system and industry-leading support of hardware transactional memory, the latest zEnterprise platform enables new software to take advantage of the growing number of microprocessors to achieve even higher throughput.

FEATURING:

Jeff Summers
Product Manager WebSphere Application Foundation IBM Software Group

Sajan Sankaran
Software Architect, Application Services and Infrastructure IBM Software Group

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NOVEMBER/DECEMBER 2012

33


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IBM Systems Magazine, Mainframe Edition - November/December 2012

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe Edition - November/December 2012

IBM Systems Magazine, Mainframe Edition - November/December 2012
Table of Contents
Editor's Desk: Been There, Done That
IBM Perspective: Not All Clouds Are Designed Equal
Insider: What's Really Driving Peak CPU Usage?
Focus on Storage: The DS8870 Provides up to Three Times the Performance of Its Predecessor
Case Study: A Capital Investment: DTCC implements tools to ensure its networking infrastructure is ready for anything
Cover Story: A Clear Vision for Cloud: System z GM Doug Balog on why zEnterprise provides a firm foundation for a secure cloud
Feature: Overcoming Cloud Obstacles: The benefits far outweigh the challenges associated with cloud integration
Tech Corner: From Silicon to Architecture, zEC12 Innovations Push the Envelope
Administrator: IBM zAware Extends z/OS Resilience to Another Level
Solutions: Attach Facility; DataSniff; AutoPilot; Eclipse; Correlog Enterprise Server 5.1
Advertisers Index
Stop Run: IBM Distinguished Engineer Joe Temple Reflects on His Juggling Past
Reference Point - Global Events, Education, Resources for Power Systems
Smarter Computing
2013 Mainframe Buyer's Guide Index
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Intro
IBM Systems Magazine, Mainframe Edition - November/December 2012 - IBM Systems Magazine, Mainframe Edition - November/December 2012
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Cover2
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 1
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Table of Contents
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 3
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 4
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 5
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Editor's Desk: Been There, Done That
IBM Systems Magazine, Mainframe Edition - November/December 2012 - IBM Perspective: Not All Clouds Are Designed Equal
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Insider: What's Really Driving Peak CPU Usage?
IBM Systems Magazine, Mainframe Edition - November/December 2012 - BB1
IBM Systems Magazine, Mainframe Edition - November/December 2012 - BB2
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 9
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 10
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Focus on Storage: The DS8870 Provides up to Three Times the Performance of Its Predecessor
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 12
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 13
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Case Study: A Capital Investment: DTCC implements tools to ensure its networking infrastructure is ready for anything
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 15
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 16
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 17
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 18
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 19
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Cover Story: A Clear Vision for Cloud: System z GM Doug Balog on why zEnterprise provides a firm foundation for a secure cloud
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 21
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 22
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 23
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 24
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 25
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Feature: Overcoming Cloud Obstacles: The benefits far outweigh the challenges associated with cloud integration
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 27
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 28
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 29
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Tech Corner: From Silicon to Architecture, zEC12 Innovations Push the Envelope
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 31
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 32
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 33
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Administrator: IBM zAware Extends z/OS Resilience to Another Level
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 35
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 36
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 37
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Solutions: Attach Facility; DataSniff; AutoPilot; Eclipse; Correlog Enterprise Server 5.1
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Advertisers Index
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Stop Run: IBM Distinguished Engineer Joe Temple Reflects on His Juggling Past
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Cover3
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Cover4
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Reference Point - Global Events, Education, Resources for Power Systems
IBM Systems Magazine, Mainframe Edition - November/December 2012 - RF2
IBM Systems Magazine, Mainframe Edition - November/December 2012 - Smarter Computing
IBM Systems Magazine, Mainframe Edition - November/December 2012 - SC2
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S1
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S2
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S3
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S4
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S5
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S6
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S7
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S8
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S9
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S10
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S11
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S12
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S13
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S14
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S15
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S16
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S17
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S18
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S19
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S20
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S21
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S22
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S23
IBM Systems Magazine, Mainframe Edition - November/December 2012 - S24
IBM Systems Magazine, Mainframe Edition - November/December 2012 - SC3
IBM Systems Magazine, Mainframe Edition - November/December 2012 - SC4
IBM Systems Magazine, Mainframe Edition - November/December 2012 - 2013 Mainframe Buyer's Guide Index
IBM Systems Magazine, Mainframe Edition - November/December 2012 - BG2
IBM Systems Magazine, Mainframe Edition - November/December 2012 - BG3
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