IBM Systems Magazine, Mainframe Edition - May/June 2013 - (Page 38)

Tech Corner Programming, systems operations and more Rewriting the Book on Virtualization Software-defined IT infrastructure: The next chapter in virtualization benefits By Jeffrey A. Frey ust when you thought you understood hardware resource virtualization—and could explain its derived technological and business value—you learn there’s more to it than you realized. And you may be surprised to know there’s more value to be derived from virtualization than efficient resource sharing and server consolidation—much more. J IBM invented server virtualization more than four decades ago. Since then, the foundational concepts of hardware resource virtualization haven’t changed. Certainly the technologies have improved; IBM utilizes more virtualization and is better at it than ever before. System z* hardware virtualization is so well integrated that the performance of virtualized and nonvirtualized systems is indistinguishable. The capability to over-commit shared hardware resources allows IBM to build systems that host the world’s most mission-critical business applications with unprecedented levels of efficiency, utilization, security and scalability. In fact, IBM no longer supports running System z servers in a nonvirtualized mode. You might say hardware virtualization is in System z DNA. So, if hardware virtualization has evolved with performance, scalability and security to the point it meets or exceeds that of bare-metal hardware configurations, what’s new? The answer is software-defined IT infrastructure using virtualization to express and 38 22 pg 38-41.indd 2 MAY/JUNE 2 013 manage IT hardware infrastructure as though it were software. Virtualization Benefits The benefits of exploiting different aspects of hardware virtualization to implement efficient operational definitions and control of an IT infrastructure are many, including: Resource sharing—Recognized as a traditional benefit of virtualization, resource sharing’s typical objective is to improve effective utilization of physical resources to gain increased effective capacity and better ROI. Often this involves resource over-commitment, an approach to resource allocation in which the aggregate allocation of virtual capacity intentionally exceeds the capacity of the physical resource being shared. One analogy is overbooking seats for an airline flight. In other cases, virtualization is used to apportion the capacity of physical resources to multiple users. In all cases, the software making use of the resource is unaware of 4/15/13 4:06 PM

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe Edition - May/June 2013

IBM Systems Magazine, Mainframe Edition - May/June 2013
Table of Contents
Editor's Desk: See Beyond the Silos
IBM Perspective: Keys to Successful Software Development
Dashboard: It's a Smarter World After All; Encouraging Exercise; Facebook Fatigue?
Insider: Reimagining Data Protection Requires Due Diligence and Defense in Depth
Case Study: Financing the Future: BNY Mellon increases workload and cuts costs by investing in a standardized mainframe environment
Feature: Making DevOps Real for System z: Linking development and operations for the continuous delivery of software innovation
Feature: Building a DevOps Pipeline: Automated testing to support application development reaps many rewards
Tech Corner: Software-Defined IT Infrastructure: The Next Chapter in Virtualization Benefits
Administrator: Single System Image Feature Delivers Greater Flexibility and Resilience
Solutions: CA Mainframe Application Tuner; Ivory Hub; Genius Project; CICS JS/Server; CA Workload Automation; QWS3270 Tablet
Advertisers Index
Stop Run: Un-Comfort Zone
Reference Point - Global Events, Education, Resources for Mainframe
Services Blueprint Issue 1 2013
2013 Mainframe Buyer's Guide Index

IBM Systems Magazine, Mainframe Edition - May/June 2013