IMS in a Parallel Sysplex

<BODY text="#000066" link="blue" vlink="purple" alink="red" background=""> <A NAME="pgtop"></A> <A HREF="indexc.htm"><Img Src="flconts.gif" ALT="Table of Contents" WIDTH=24 HEIGHT=24></A> <A HREF="index18.htm"><Img Src="fllarrow.gif" ALT="Previous" WIDTH=24 HEIGHT=24></A> <A HREF="index20.htm"><Img Src="flrarrow.gif" ALT="Next" WIDTH=24 HEIGHT=24></A> <A HREF="#pgbot"><Img Src="flnote.gif" ALT="Speaker Notes" WIDTH=24 HEIGHT=24></A> <BR> <IMG BORDER=0 SRC="index19.gif" WIDTH="443" HEIGHT="342" ALT="Page Image"> <HR ALIGN="left" size=5 WIDTH="65%"> <A NAME="pgbot"></A> <UL><LI>IMS continues to strengthen its support of the Enterprise by providing the highest in performance, availability, security, integrity, at the least cost per transaction. In doing this it has been exploiting the hardware/software environments that it has grown up along side of. IMS fully exploits for customer advantage the new technology and power of OS/390 and the Parallel Sysplex. Existing IMS data sharing capability was enhanced with IMS Version 5 to take advantage of the coupling facility for storing lock information and for easy availability of that information by all systems in the Sysplex environment. The lock manager in each system could access the locks as they needed to. In addition to data sharing, IMS V5 provided necessary information to the MVS workload manager to assist with workload balancing of resources across the Sysplex. IMS also enhanced message routing between systems to take advantage of workload balancing information, and IBM provided the IMS Workload Router to use these facilities to push the work to the available system. Significant enhancements for IMS V6 are being added to those provided in IMS V5 to complement the Parallel Sysplex hardware and operating systems facilities. IMS V5 also provided Remote Site Recovery, which allowed backing up an IMS system with another at a different location. A database at another system is maintained to match the primary database and/or a log is maintained that can dynamically and quickly update that remote data base to allow takeover in the event of failure. <LI>IMS V6 and V7 improved the IMS V5 Data Sharing and Workload manager enhancements with additional data sharing (storing changes and unaltered data on the coupling facility for Sysplex access, and providing additional Fast Path sharing), message sharing (providing message queues and fast path messages on the coupling facility for Sysplex access), and message routing enhancements (utilizing VTAM Generic resource support). As customer workload grows, the power that distributing data and applications across the Sysplex provides is needed. End users want to be able to access applications and data transparently, regardless where the work is processing. This enhanced support provides improved end user interaction, improved IMS availability, improved workload balancing, and offers increased capacity and growth in moving into Parallel Sysplex environments. </UL> <HR ALIGN=left size=5 WIDTH=65%> <A HREF="#pgtop"><Img Src="flpage.gif" ALT="Top of Page" WIDTH=24 HEIGHT=24></A> <FONT SIZE="-2">Published by <A HREF="http://www.lotus.com">Lotus</A>® <A HREF="http://www.lotus.com/freelance">Freelance Graphics</A>®</FONT> </BODY>