Category Archives: IBM zEnterprise Servers

IBM Mainframes High Availability Concepts and Sysplex

Posted on 03 September 2018 by ismet

  High availability can be achieved in IBM mainframe environment utilizing parallel sysplex. Parallel sysplex is clustering technology which enables total capacity of multiple processors to be applied against common workloads as if they are part of a single computer … Continue reading →

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Global Resource Serialization for zOS – To Serialize or Not To Serialize

Posted on 08 December 2016 by ismet

Summary This Article summarizes concepts of GRS in IBM zOS mainframe systems explaining how data sharing is performed in a multi-system environment. It also illustrates design specifications of related products. Finally operational aspects for different topologies are described. Introduction As … Continue reading →

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Dynamic Workload Management in IBM System z Mainframe Environment

Posted on 11 November 2014 by ismet

Summary Workload manager (WLM) employed in IBM System z environment is one of most sophisticated performance monitoring and control tool in IT industry. In this article, first WLM concepts and facilities has been summarized. After going over evolution from machine … Continue reading →

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Business Continuity Concepts at a Glance

Posted on 15 April 2014 by ismet

Expectations from today’s business environment are high availability, continuous operation and quick disaster recovery. For these reasons, enterprises and partners try to increase their ability to respond to risks. Although it is more difficult, they also try to utilize opportunities. … Continue reading →

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IT Security Audits for IBM zOS Systems from Top Secret Perspective

Posted on 11 February 2014 by ismet

An information technology security audit is a manual or systematic measurable technical assessment of an information system. Manual assessments include interviewing staff, performing security vulnerability scans, reviewing application and operating system access controls, and analyzing physical access to the systems. … Continue reading →

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BMC Control-M and Control-O Products on zOS

Posted on 07 June 2013 by ismet

Job scheduling and console automation are very important operational characteristics of high-end enterprise data centers. Control-M and Control-O are nice pieces of BMC software to achieve high service levels. I will tell how to use these tools in customer installations. … Continue reading →

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zSecure Installation and Operation

Posted on 01 May 2013 by ismet

zSecure is a suite of security products to improve management of System z security environment. zSecure Admin and zSecure Visual components are the ones I installed and reconfigured recently. zSecure Admin lets security administrator perform more productive and zSecure Visual … Continue reading →

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SMP/E HOLDERROR Processing in IBM System z Software Management

Posted on 10 April 2013 by ismet

Recent discussions with some colleagues showed me that this is an area which requires some clarification. SMP/E (System Management Program/Extended) is the tool for performing maintenance on z/OS systems and System z components like DB/2, CICS, WAS etc. Program products … Continue reading →

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Increasing Number of CHPIDs (Channel Path Identifiers) for LCUs (Logical Control Units)

Posted on 30 January 2013 by ismet

The channel subsystem (CSS) and the IBM z/OS operating system need to know what hardware resources are available in the computer system and how these resources are connected. This information is called hardware configuration. Hardware Configuration Definition (HCD) provides an … Continue reading →

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Suppressing CICS TD (Transient Data) Messages

Posted on 01 November 2012 by ismet

Some CICS TS (Transaction Server) system messages written to TD queues tend to flood zOS JES spool. For example: DFHSN1400 07/19/2012 17:04:32 CICSPACK Session signon for session J1 by user CTGRUS is complete. DFHSN1500 07/19/2012 17:04:32 CICSPACK Session signoff for … Continue reading →

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