Latest Entries

This article discusses the capacity of Logical Partitions (LPARs). Through various parameters, there are three different “capacities” that you can define for each LPAR on a zSeries Central Processing Complex (CPC): the number of logical processors, the processing weight, and the defined capacity. Setting these parameters is based on a combination of factors that are technical, political, and financial. Naturally, these factors are sometimes in conflict with one another. This article, which is based on personal research, describes the relationship between these parameters…

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Application programmers have an exciting new tool they can use to make user programs much easier to debug, therefore producing more durable programs. No longer must we depend on the DISPLAY statement in our COBOL programs or the “ready trace replacement” code as our tools of choice! IBM’s Debug Tool for VSE/ ESA brings an effective new resource to the VSE user community. After using and working with the…

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Mainframe SAN Security

Once considered the bastion of securely stored data, mainframe storage may not be as secure in the future as it has been in the past. With IBM’s decision to make FICON the recommended mainframe storage connection, mainframe storage managers can’t be faulted for suddenly feeling a little nervous…

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z/BOTTOM LINE: War and Peace

Both sides believe they’re right. Side 1 has always been charged with safeguarding all that matters and claims, “Our way is the only right way, and we’re going to pursue our ideas whether we have support from others or not.” Side 2 believes Side 1 is outdated, headstrong and too accustomed to doing things their own way. The Sides sit down and try to iron out their differences, but they’re intransigent from the beginning…

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There are those who would argue that the history of distributed computing is a classic illustration of the old saw, “What goes around comes around.” If the 1970s witnessed the movement of computing out from under the protected shelter of the centralized data center and into the decentralized wilds of the cubicle farms and equipment closets of the corporate workplace, then the early 2000s are presenting a logical countertrend as distributed computing takes a course that leads it back into the glass house once more…

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What is Your JCL Really Costing You?

As part of the Y2K effort, migration teams were chartered with ensuring that their operating systems and ancillary vendor software products were properly updated. During this process, they often discovered another hidden and impending problem that needed to be addressed — the task of reviewing, auditing, remediating, and migrating cataloged procedure libraries that contained critical system and application JCL. What the review process often revealed was many generations of legacy system and application cataloged JCL procedures that had collected in these libraries over a period of years. What many teams thought to be just another routine task suddenly turned into an overwhelming research and cleanup effort. In many cases, teams most likely propagated these libraries (with limited inspection) to newly minted systems. Others chose the alternative by treating the JCL contained in these libraries as a corporate asset that required immediate attention as well as periodic maintenance and management. Which team were you on? 

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