IBM Systems Magazine, Mainframe - March/April 2014 - (Page 66)

TECH CORNER What Sets SYSTEM Z Apart? Robust compatibility is a cornerstone of the mainframe's staying power F or enterprise clients, compatibility goes far beyond a common instruction set and extends to how they use these systems in their businesses. Throughout its history, the IBM System z* platform has delivered robust compatibility, enabling clients to grow, expand and evolve their IT operations seamlessly, even as the underlying technology has undergone radical changes. Charles Webb is an IBM Fellow and has been with IBM in Poughkeepsie, N.Y., since 1983. He has worked on mainframe processor performance analysis, processor design and system design. As the IT industry faces a new set of changes and challenges, this commitment to comprehensive compatibility continues to set the mainframe apart, ensuring that clients can exploit new technologies, capabilities and computing models without missing a beat. Basic Compatibility As the S/360 architecture evolved to z/Architecture*, new features and extensions were carefully crafted to allow upward compatibility so older programs could run on newer hardware without changes, even while running alongside newer programs written to take advantage of the latest features. Even when new operating modes were introduced such that OS changes were needed to exploit new extensions, no change was required of the applications running under the OS. This rigorous functional compatibility has yielded great benefits for IBM mainframe clients over the years. Many are still running applications 66 // MARCH/APRIL 2014 ibmsystemsmag.com written decades ago, some of which have not been re-compiled in recent memory on the latest zEnterprise* EC12 and zEnterprise BC12 systems. The IBM commitment to compatibility means investments can be made in System z software without concern that the next generation of hardware will make it obsolete, and clients can upgrade hardware and software independently, reducing the potential for disruption to critical operations Robust Compatibility As the software architectures implemented on mainframes became more complex and as enterprises became more dependent on these systems for their day-to-day operations, it stopped being merely "good enough" to provide functional compatibility at the program level. A drop in the performance of some operation compared to the rest of the system could throw things out of balance and keep some workload from scaling with growing demand. A change in the handling of an error condition could cause a minor glitch to escalate to a major problem. Thus, mainframe developers must look beyond Investments can be made in System z software without concern that the next generation of hardware will make it obsolete, and clients can upgrade hardware and software independently, reducing the potential for disruption to critical operations. http://www.ibmsystemsmag.com

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - March/April 2014

Table of Contents
Editor's Desk: Generation Z forges ahead
IBM Perspective: Celebrating 50 years of mainframe innovation
SHARE Outlook: The user group's value to the mainframe community
Partner PoV: Hosting virtual desktop on System z can decrease complexity and save costs
Trends: Automation Control introduces enterprise-class automated operations for smaller z/OS environments
IT Today: IBM's Steve Mills on the economics of IT and cost-saving strategies
Case Study: Money In The Bank: Isbank Turkey improves performance across the board by upgrading to the IBM zEnterprise EC12
Cover Story: Generation Z on System z: Rewarding partnerships and careers evolve from IBM’s Master the Mainframe contest
Feature: UBER-Competition: The Master the Mainframe World Championship tests the best and the brightest students on System z app-building
Feature: Making Giant Leaps: Advances in virtualization, Linux adoption and cloud deployments keep the mainframe at the top of its game
Business Partner Histories
Tech Corner: Robust compatibility is a cornerstone of the mainframe's staying power
Solutions: Abend-AID; SANSlide Series 150V7KSVC; Virtual Machine Backup 5.0; IntelliMagic Vision 7.0.0; SCM Accelerator
Stop Run: Computing museums reveal how quickly IT has changed
Reference Point - Global Events, Education, Resources for Mainframe
2014 Mainframe Solutions Edition Product Index

IBM Systems Magazine, Mainframe - March/April 2014

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