Latest Entries

Workload Manager:  Revisiting Goals Over Time

The MVS Workload Manager (WLM) was first introduced with MVS/ESA 5.1. Since then, it has evolved to become one of the most integral parts of the z/OS operating system and to IBM’s overall strategy for self-managing, self-healing, and self-tuning systems. I remember when WLM was first introduced, many performance analysts were concerned their jobs would be eliminated or that they would lose control over system performance. Well, I can confidently say that neither has happened.

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Goodbye GRAVY TRAIN

What a difference 42 years makes! As a new “data processor” in 1961, I would snicker when reading Forbes’ periodic recitals of the “fallen” industries of the early 20th century. Fallen may be too strong a word; some of these industries were still active, but their days of glory and high growth were past – often long past. I never thought that I would witness the time when the glory days of the software industry would pass. However, at the start of the 21st century, as I look around at the industry, particularly the mainframe segment, it’s obvious that the gravy train has derailed…

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DB2 YDB Server for z/OS Version 8

This and the previous article (z/Journal, June/July 2003) highlight the many different areas where DB2 is being enhanced to leverage the new z/OS capabilities and provide new features that take databases to the next level. This article examines the Very Large Database (VLDB) enhancements along with migration considerations for getting to DB2 UDB Server for z/OS Version 8. We also examine other enhancements, such as the new index type, Data Partition Secondary Indexes (DPSIs), statistic improvements, and new DSNZPARMS that provide numerous dynamic adjustment capabilities.

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Solution Showcase

As M&T Bank of Buffalo, NY, completes its acquisition of Allfirst Bank of Baltimore, MD, the newly combined institution is growing into one of the top-20 largest banks in the U.S. M&T Bank’s asset base is jumping from $33 billion to $49 billion, and the financial institution is adding 262 branches to its current network of 470. The acquisition also adds some 5,000 employees, increasing the bank’s workforce to about 14,000 tellers, customer service representatives, managers, and technical support personnel.

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Playing Well With Others: Linux on z/VM

In the past, when looking at Linux on the mainframe, we considered Linux on S/390 or zSeries as simply another architecture. The S/390 platform is a 32- bit big-endian processor, and therefore, Linux on zSeries is conceptually no different from Linux on Alpha, SPARC, or PowerPC. The only areas in which there are significant differences are within the kernel and device drivers, and very few users (or even system administrators) need to be concerned with architectural features…

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