IBM Systems Magazine, Mainframe - July/August 2015 - (Page 41)

ADMINISTRATOR EDITOR'S NOTE: This is part one of a two-part series on the IBM DS8870 storage subsystem on the IBM z13 platform. DS8870 INNOVATIONS in SUPPORT of the z13 Platform New technologies include those aimed to reduce costs and improve resilience, scale and performance I BM z Systems* and storage technologies strive to deliver on certain core principles. Among them are adding value for client workloads with improved reliability, availability, performance and reduction in total cost of ownership. IBM also strives to match increased capabilities and capacity with increased I/O capabilities, I/O rates, bandwidth and latency. These are essential for existing workloads such as transaction processing and client demands for cloud, analytics, mobile, social and security. Christopher Colonna is the FICON channel firmware execution team lead for z Systems, IBM Systems. Roger G. Hathorn is a Senior Technical Staff Member for enterprise storage I/O architecture and development, IBM Systems. Harry M. Yudenfriend is an IBM Fellow for storage development and mainframe I/O technology, IBM Systems. Ever-increasing mobile- and analytics-initiated I/O activity stresses older IT systems' capabilities, bombarding them with requests even as they provide new data to existing applications. Also, accelerating database transactions is good for business; consistently fast transactions yield higher user productivity and satisfaction. The IBM z13* system and DS8870 storage subsystem have been designed to meet these ever-increasing demands. More Speed and Capacity New FICON* Express16S channels available with the z13 platform provide additional I/O capacity to help balance the new processing power with I/O capability. In IBM testing, the modestly increased start rate of about 6.5 percent makes the maximum I/O start rate about 98,000 per second. Channel bandwidth is substantially improved to 2,600 MB/second, bidirectional. This represents a 63 percent improvement in a single channel's I/O bandwidth. Perhaps the most important capability provided by the 16 Gb Fibre Channel (GFC) technology is a substantial reduction in I/O latency. When the FICON Express16S channel is used in combination with the DS8870 storage and 16GFC Host Adapter (HA) for a true end-to-end link speed of 1,600 MB/second, substantial improvements in I/O latency are achieved. DB2* commit elapsed times with DS8870 zHyperWrite* technology combined with FICON Express16S on the z13 processor and 16GFC HA in the DS8870 were substantially improved by up to 61 percent as compared to FICON Express8S on an IBM zEnterprise* EC12 without zHyperWrite. Large Systems Performance Reference IMS workload with FICON Express16S technology was demonstrated for the write ahead data set (WADS) and online log data set (OLDS). The IMS WADS data set, a critical path for IMS latency requirements, is improved by 14 percent as it does not yet exploit z Systems High Performance FICON (zHPF) protocols. The IMS OLDS data set, however, JULY/AUGUST 2015 // 41

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - July/August 2015

Table of Contents
Editor's Desk: An important note
IBM Perspective: Transforming travel end to end
Partner PoV: Maximize the platform's business value by addressing challenges now
IT Today: Infrastructure matters: Myth or truth?
Case Study: Turning Complexity Into Simplicity: Vissensa Ltd. deploys an IBM Enterprise Cloud System to relieve the IT burdens of its clients
Cover Story: Industry Importance: Applying disruptive technologies in a nondisrputive way helps mainframe clients achieve business efficiency
Feature: Security Notification: Mainframe companies must be proactive and educated in testing and protection, expert says
Feature: Industry Improvements: Clients from five key industries highlight what's possible with IBM mainframe
Tech Showcase: Businesses must look at the big picture to take advantage of analytics
HotTECH Products
Administrator: New technologies with the IBM z13 and DS8870 systems aim to reduce costs and improve resilience, scale and performance
Solutions: ARCAD- Anonymizer; FDRPASVM, MVT Vault, STEPLIB-Rx 3.1; Topaz, ISPW V4.4, Savvytest 2.1
Stop Run: 'Things just clicked' for IBMer looking for his path
Reference Point - Global Events, Education, Resources for Mainframe
2015 Mainframe Solutions Edition Product Index

IBM Systems Magazine, Mainframe - July/August 2015