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 →

Posted in IBM zEnterprise Servers, IT Service Management | Tagged system z, IBM mainframe, Parallel Sysplex, Continuous operations, High Availability Continuous availability Fault tolerance, Failure detection, Disaster recovery | Leave a comment

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 →

Posted in IBM zEnterprise Servers | Tagged access, adapter, associates, authority, availability, base, CA, CF, channel, cluster, complex, computer, coupling, CTCA, DASD, DASDONLY, deadlock, DEQ, dequeue, ENQ, enqueue, exclusive, facility, FICON, global, GRS, IBM, image, job, mainframe, member, message, MIM, MIMPLEX, multi, multiprocessing, multitasking, multiuser, parallel, process, program, qname, queue, release, reserve, resource, ring, rname, RNL, RSA, serialization, serialize, shared, single, star, structure, SYSPLEX, system, system z, task, topology, transaction, unit of work, user, z series, z system, zOS, zSeries | Leave a comment

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 →

Posted in IBM zEnterprise Servers, IT Service Management | Tagged CHPID, compatibility mode, discretionary, execution velocity, goal mode, ICS, IPS, IRD, jes, LPAR, management, middleware, parmlib, performance index, response time, service level, sla, slm, SYSPLEX, wlm, workload | Leave a comment

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 →

Posted in IBM zEnterprise Servers, IT Service Management, Risk Management | Tagged application, availability, backup, business, commit, consistency, consistent, continuity, data, database, disaster, downtime, hardware, image copy, integrity, log, maintenance, objective, opportunity, outage, primary, recovery, repeatable, Risk, roll back, secondary, site, timeline, tolerable, transaction, unit of work | Leave a comment

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 →

Posted in IBM zEnterprise Servers, Risk Management | Tagged ACID, apf, APPC, audit, batch, CA, CAAT, CICS, Computer Associates, EAL5, ftp, IBM, IEHINITT IEFBR14, IEHPROGM, IT security, jcl, jes, jes2, job, LPAR, mainframe, MQ, MSCA, omvs, PPT, PROCLIB, racf, SCA, sna, SPZAP, STC, system z, TCP, top secret, TSO, tss, TSSAUDIT, TSSCHART, TSSTRACK, TSSUTIL, VCA, WHOHAS, WHOOWNS, z series, ZCA, zOS | Leave a comment

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 →

Posted in IBM zEnterprise Servers, IT Service Management | Tagged automation, BMC, CONSOLE, Control-M, Control-O, IOAISPF, job, rule, schedule, scheduling, zOS | Leave a comment

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 →

Posted in IBM zEnterprise Servers, IT Service Management | Tagged 3270, access, admin, apf, carla, gui, ispf, monitor, omvs, parmlib, pdf, racf, security, SMF, smpe, SYSPLEX, system z, TN3270, TSO, uss, visual, zOS, zsecure | Leave a comment

Category Archives: IBM zEnterprise Servers

IBM Mainframes High Availability Concepts and Sysplex

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

Dynamic Workload Management in IBM System z Mainframe Environment

Business Continuity Concepts at a Glance

IT Security Audits for IBM zOS Systems from Top Secret Perspective

BMC Control-M and Control-O Products on zOS

zSecure Installation and Operation

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