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All too often we don’t assume a disaster will actually occur. Many times, Disaster Recovery plans are only tested on through “walk throughs”. One lesson from the bombing of the World Trade Center in the ’90s was that companies that failed to have a Disaster Recovery plan in place failed. The statistics were a bit shocking. In the 1993 World Trade Center bombing, 150 businesses out of 350 failed to survive the event!

With OpenVMS it is possible to design a High Availability, Disaster Tolerant solution. With other storage tools, you can even readily build a Disaster Recover system, separated by continental distances. Why go to this level of extreme? Because “stuff” happens all the time. You must assume systems and sites will not be accessible. But it is important for the business to continue to have access to the storage and applications.

That’s why customers remain loyal to OpenVMS, because it works. And it is possible to build an elegant, effective and cost effective solution.

clipped from www.youtube.com

Dilbert: Disaster Recovery Plan

Sometimes when we are asked to compare and contrast various features in proposed hardware configurations, it can be difficult to wade through all the words to understand which set of options provides the best answer. Here an analysis tool known as a “Kiviat Graph” or “Kiviat Chart” (or sometimes a “Kiviat Star”) provides great visual insight into the options before you.

The following excerpt from this article highlight how you can use a Kiviat Graph to help sort through the options. I use this all the time as I try to compare and contrast various features of storage. Sometimes by taking the emotion out of the equation and charting the features, you can SEE the result of the proposed option.

I offer this simple technique as one method to wade through numerous options and learn to quickly SEE the results of those options on your business and your environment.

And my compliments to Craig Borysowich, who created this article. It is well done and a good resource. Sharing knowledge is what helps us make our IT industry better, more robust and better able to help us address the business problems of the businesses that we serve.

clipped from it.toolbox.com

Observations from a Tech Architect: Enterprise Implementation Issues & Solutions

by Craig Borysowich?(Chief Technology Tactician)

Better Kiviat Diagrams

Use a Kiviat Diagram to graphically represent, on a single diagram, how multiple items compare when they are evaluated against more than two variables.?

The advantage of the Kiviat Diagram over other charting/graphing techniques is that it can show more than two variables on one diagram.

When analyzing a Kiviat Diagram, look carefully at the surface area of the footprint.? The surface area can be misleading.? Imagine a Kiviat Diagram with six axes (with a range on each axis from one to 10).? Plot one situation where the axis one value is one, the axis two value is 10, the axis three value is one, the axis four value is 10, the axis five value is one, and the axis six value is 10.? The footprint in this situation is narrow.

Whoops! Both the HP RAID Software for OpenVMS and the XP RAID Manager client use the same first four characters for their DCL verb: RAID* … Ouch! If you need both, you need to use a DCL foreign command definition for the XP RAID manager client. I’ll update this post with an example.

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It sometimes helps to have one area where you can go to locate pointers to other resources. That is one objective I have with this website. I do a lot of research to help determine how to solve issues with OpenVMS storage. This blog can be a pointer to other resources.

For example, most you already saw the HP Disaster Proof video. It is exciting to see how well OpenVMS did at the detection and recovery from the disaster. But everyone who works with OpenVMS is not surprised. Of course, as you can imagine many people without that experience thought the test was rigged. It was not.

If you have not seen it, you may find the HP Disaster Proof video quite interesting:

While it’s fun to see, this presents an example of how I will share lessons learned through this podcast. In particular, an OpenVMS Disaster Tolerant Cluster can use an Extended SAN.

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