Operating Systems

As our systems have evolved, so, too, has our management focus. Beginning with managing a single system resource, to tightly integrated systems and their resources, to today’s focus on service management, this evolution over the past 50 years has built on fundamentals refined over this same period. Many of us have been working with mainframes for so long, there’s a lot we take for granted. One area we often overlook in our transfer of knowledge to new System z systems programmers is the fundamentals of z/OS TCP/IP network management. As a resource, it’s critical to the overall ability of the z/OS operating environment to provide services to the applications that run the business. This article will assist in filling this gap…

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Have you ever wondered if your Linux on System z-specific settings are still correct after a security update or an operating system upgrade? Are you puzzled about what buffer count value should be used with QETH devices for optimal performance? If the answer to these and similar questions is yes, don’t worry, the Linux Health Checker (LNXHC) tool is here to help.
 
The LNXHC tool is available for Linux on System z distributions and helps identify potential problems that could arise due to deviations from certain Linux on System z best practices…

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Since POWER6, IBM has provided a way to move a logical partition (LPAR) between servers while it’s running, allowing you to migrate an LPAR or LPARs without any downtime. This feature is called Live Partition Mobility (LPM) and is provided by the Enterprise Edition of PowerVM, which must be installed on all servers involved…

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Where were you 50 years ago on April 7, 1964? For most people in IT, that’s a crazy question because most of them weren’t even born yet. But it’s definitely a fair question for many mainframers. That’s right, many of us mainframers are a bunch of old-timers who will have no problem with that question. The fact that so many mainframers are nearing retirement age is an important issue, but not one that will be dealt with here…

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The cost and management of IT software pose a huge headache for corporations today. It’s imperative they know what software is installed, where it’s installed and who is using it. Without this information, these companies are more than likely paying for seldom-used, unused or obsolete software. They then run the risk of incurring unnecessary software upgrade and maintenance fees…

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A couple of months ago, one of the leading x86 server virtualization software vendors (the self-styled “market share leader” in a smallish pool comprising roughly 17 to 20 percent of all installed servers [those actually running server hypervisor software]) held its annual conference in Northern California. At the event, the vendor introduced a modest, if incremental, update to its flagship product that seemed to fall short of evoking much excitement even from the usual crowd of devoted fans, let alone the few hundred members of its “vendor ecosystem,” who occupied the caravan of tents in the middle of the exposition center. …

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Enterprise Tech Journal recently spoke with Debra Costello, principal platform engineer GIS for CA Technologies, and Craig Guess, senior principal product manager for CA Technologies, to discuss the IT environment at CA and how their organization not only develops CA Chorus but is also a user.

Enterprise Tech Journal: Can you talk a bit about the IT environment at CA Technologies?…

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There’s a growing trend to deliver IT capabilities such as software, platforms and infrastructure as on-demand, scalable, elastic cloud services; this is often referred to as Everything as a Service, or XaaS. The primary benefit of the XaaS model is the ability to offload IT functions to a single service provider. In enterprise environments, central IT organizations can act as XaaS providers to aggregate vital IT functions and resources and offer them as on-demand services. This allows greater agility, faster response to market changes and a new, improved ability to contain costs…

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