Author Archives: ismet

IBM Mainframes High Availability Concepts and Sysplex

  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

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

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

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

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

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

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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