Mainframe Solutions

Dr.Steve.Guendert

Software Defined Networking: a New Paradigm?

by Dr.Steve.Guendert ‎12-03-2013 01:36 PM - edited ‎12-03-2013 01:35 PM (3,516 Views)

Is SDN really a new idea, or has the mainframe already been doing this in some form for many years?

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Dr.Steve.Guendert

Mainframes and Social Media

by Dr.Steve.Guendert on ‎05-29-2012 02:44 PM (102 Views)

Over the weekend I realized that I have violated one of the cardinal rules of blogging.  It has been 2 months since our last blog post. That is an eternity in the era of social media where we're bombarded with tweets and Facebook updates con

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I just returned to the office after two weeks in China.  I was in Shanghai and Beijing to work with my good friend, IBmer Dennis Ng.  Dennis and I, as mentioned in

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I have been visiting with customers in Asia and Europe recently who are in the midst of doing infrastructure and/or storage refresh in their data centers. Typically the results from upgrading your fibre channel infrastructure is good news fo

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In chapter two of this new blog series of mine I am going to tackle what I consider to be a data center FOLLIE.

Cables (multi-mode or single mode) and Optics (SFPs) go together, hand in glove. Short wave SFPs are always attached

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In chapter one of this new blog series of mine I am going to discuss a FICON FABLE first.

As you know, FICON Channel Features provide the System z with Fibre Channel port connectivity for FICON storage and FCP storage. Each of t

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Dr.Steve.Guendert

The Performance Information Gap Paradox

by Dr.Steve.Guendert on ‎02-01-2012 02:53 PM (242 Views)

Happy February??  I thought perhaps I missed two months,  I never would have thought it would be 60 degrees (Fahrenheit) in Columbus, OH on February 1st. Anyway....

In my last blog post on

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Dr.Steve.Guendert

2012: Performance, Performance, Performance

by Dr.Steve.Guendert on ‎01-11-2012 01:06 PM (209 Views)

Greetings!

I hope everyone had a wonderful holiday season, a Merry Christmas, and a Happy New Year!  This is our first blog post of 2012, and as 2012 starts we're working on several interesting things primarily focused on perfor

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Dr.Steve.Guendert

The 16Gbps FICON DCX 8510: It's a big deal

by Dr.Steve.Guendert on ‎11-29-2011 10:19 PM (37 Views)

On 29 November 2011 IBM announced support for FICON on the Brocade DCX 8510 family of 16 Gbps fibre channel directors (IBM SAN 768B-2 and SAN 384B-2).  IBM announced general availability (GA) for 2 December 2011.  The detailed IBM announceme

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Mainframes have been evolving for four plus decades and with the IBM zEnterprise System, have re-established themselves as core processing facilities that contain

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Dr.Steve.Guendert

Happy 47th Birthday IBM Mainframe

by Dr.Steve.Guendert on ‎04-01-2011 01:10 PM (105 Views)

April 7th is next week and to mainframers that is a special day.  April 7th marks the 47th birthday of the IBM Mainframe. Some may argue that IBM had other "mainframes" prior to this date, such as the IBM 701 Defense Calculator

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Greetings and Happy 2011.  Its a great time to be a mainframer.  IBM's new model z196 is enjoying tremendous success around the world.  IBM mainframe technology appears to be experiencing a

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Howard.Johnson

Load Sharing and Load Balancing for FICON

by Howard.Johnson on ‎09-22-2010 08:31 AM (30 Views)

Load sharing and load balancing are two functions that are often confused when discussing SAN performance.  When balancing loads, the idea is to balance the “potential” flows over the available paths.  When sharing loads, the idea is to dist

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July 22, 2010 was a significant day in the history of mainframe computing.  The new IBM zEnterprise is not merely a new mainframe.  It represents the culmination in what may very well be the shift back to the centralized model of computing.

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OK, yes I know.  The title for my post sounds like a sequel for a “B” movie.   Well, in a way it is kind of a sequel.  Allow me to explain.

Let’s take a brief trip down (mainframe I/O) memory lane.  Its early 2004 and IBM has an

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