IBM Systems Magazine, Mainframe - May/June 2014 - (Page 50)

TECH CORNER Memory in a FLASH Flash Express provides increased system availability and resiliency during peak demand F lash storage is now integrated into IBM System z* servers, providing additional auxiliary storage with better performance than external disks. A new feature, Flash Express, is implemented with PCI Express (PCIe) adapters containing SSDs configured in pairs of RAID 10 arrays in I/O expansion drawers. Initial exploitation of Flash is to extend real memory in z/OS*, which integrates it within the memory hierarchy to provide increased system availability and resiliency during paging-intensive events. Elpida Tzortzatos is a senior technical staff member and team leader for the z/OS Core Development Team. Peter Szwed is a senior engineer in System z I/O firmware development, part of IBM Systems and Technology Group. Edward Chenciski is a senior technical staff member and chief engineer in IBM Systems and Technology Group I/O subsystem development. Flash offers reduced access latency, with higher I/O operations per second (IOPS). The z/OS server exploits these characteristics to improve system availability by lowering the time to provision, respond to changing workloads and complete dumps. Further benefits are gained by utilizing flash to support pageable 1 MB pages. The Benefits Businesses are pressured to deliver ever-higher levels of availability in many industries, including finance, banking and healthcare. The z/OS server uses Flash Express on System z to provide additional system availability and resilience transparent to applications. The benefits include: ĀÃ5HGXFHGÃZRUNORDGÃDQGÃ response-time delays caused by increased memory pressure during periods of peak demand, workload transitions and diagnostic collection. When workloads shift from daytime transactional processing to evening batch workload and back, response-time delays can occur. The system can reduce delays by using Flash when transactional data must 50 // MAY/JUNE 2014 be transferred from auxiliary storage to real memory. ĀÃÃ)DVWHUÃGDWDÃWUDQVIHUÃE\Ã)ODVKÃ during diagnostic dumps. Increased I/O bandwidth reduces first failure data capture time, supports faster page-ins for critical work and allows the system to return to normal workload operations significantly faster. ĀÃÃ,PSURYHGÃSHUIRUPDQFHÃ$VÃ databases and JVMs consume larger amounts of memory to provide better transactional response times, the lower memory management costs of large (1 MB) pages can improve overall response times and application performance. Faster random access and higher IOPS for reads from Flash enable z/OS to support pageable large (1 MB) pages, transferring larger chunks of data more quickly between real memory and Flash. That can translate to better performance for DB2*, Java* and analytic workloads. Save Time and Increase Transactions Performance analysis shows Flash can improve transaction Figure 1: Morning Transition Results

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - May/June 2014

Table of Contents
Editor's Desk: Looking to the cloud for support
Techbits: Calling Ugandan Government
Partner PoV: With the right approach mainframers can improve the application environment to better position themselves for the future
Trends: Partnerships with MSPs allows more companies to be on the platform than ever before
Currents: Figuring out the questions to be answered simplified the search for information within unstructured data
R&D: Science and serendipity meet at the IBM Accelerated Discovery Lab
Case Study: Good Medicine: SinfoniaRx improves patient services by moving to a zEnterprise 114 Enterprise Linux Server
Cover Story: A Cloud In A Box: Enterprise Cloud System is IBM's first converged mainframe offering
Feature: Reliability Amid Change: Develop cloud applications and meet consumer expectations with the IBM CICS V5.2 application server
Tech Showcase: Why enterprises are considering cloud
Administrator: In addition to increasing raw speed and feed, software can provide information directly to the System z microprocessor
Tech Corner: Flash Express provides increased system availability and resiliency during peak demand
Solutions: Accelerator for .NET 4.3; Ivory Data Hub v5.2.0; Savvytest 2.0 for z/OS; zHISR 2.0; Ivory Service Architect; SpaceFinder
Stop Run: Community orchestra inspires IBM data scientist Scott Spangler in work and life
Reference Point - Global Events, Education, Resources for Mainframe
Special Report: Big Data's Competitive Advantage
Special Report: IBM Global Training
2014 Mainframe Solutions Edition Product Index

IBM Systems Magazine, Mainframe - May/June 2014