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IBM recently analyzed various likely customer workload scenarios and found that the System z as an enterprise Linux server could consistently beat x86 machines in terms of TCO (Total Cost of Ownership). The analysis, which I will dig into below, was reasonably evenhanded although, like automobile mileage ratings, your actual results may vary…

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Just within the past couple of weeks, I've received questions of a similar nature from two different DB2 for z/OS people. In each message, a DBA described a change that he had made in a production DB2 environment (in one case a size increase for several buffer pools, and in the other a change from an external stored procedure to a native SQL procedure). The questions asked pertained to assessing the impact of the change on system and/or application performance…

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Companies are always trying everything to gain a competitive edge, but with dysfunctional data procedures, management/CIO turnover, and lean business profits, new data projects face unprecedented difficulties. With the plethora of IT trends, directions and technologies, cloud platforms, big data, and new anemic exotic scripting languages, IT personnel are getting conflicting directions for their project efforts, leading to data chaos within many companies…

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The legendary IBM mainframe celebrated its 50th birthday just this past Monday, April 7, 2014; having outlived many predictions of its imminent demise. I started working with the mainframe in the mid-80s, soon after graduating from college. Like most others, I started programming mostly in COBOL and PL/1 and sometimes in Assembler…

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