Category Archives: z/OS Environments

How to Measure the Impact of a Zero RPO Strategy

Merle SadlerBy Merle Sadler

Have you ever wondered about the impact of zero RPO on Mainframe Virtual Tape for business continuity or disaster recovery? This blog focuses on the impact of jobs using the Oracle/STK VSM Enhanced Synchronous Replication capability while delivering an RPO of 0.

A recovery point objective, or “RPO”, is defined by business continuity planning. It is the maximum targeted time period in which data might be lost from an IT service due to a major incident.

Zero RPO - Recovery Point Objective

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The High Cost of “Unpredictable” IT Outages and Disruptions

By Curtis Ryan

High Costs of IT Outages

It is no secret that IT service outages and disruptions can cost companies anywhere from thousands up to millions of dollars per incident – plus significant damage to company reputation and customer satisfaction. In the most high profile cases, such as recent IT outages at Delta and Southwest Airlines, the costs can soar to over $150 million per incident (Delta Cancels 280 Flights Due to IT Outage). Quite suddenly, IT infrastructure performance can become a CEO level issue (Unions Want Southwest CEO Removed After IT Outage).

While those kinds of major incidents make the headlines, there are thousands of lesser known, but still just as disruptive to business, service level disruptions and outages happening daily in just about every sizeable enterprise.

The costs of these often daily occurring incidents, like an unexpected slowdown in response time of a key business application during prime shift, can have a significant cumulative financial impact that may not be readily visible in the company’s accounting system.

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What’s Using Up All My Tapes? – Using Tape Management Catalog Data

BrettBy Dave Heggen

tape management catalog

Most of the data processed for IntelliMagic Vision for z/OS Tape is performance, event or activity driven, obtained from SMF and the Virtual Tape Hardware. Did you know that in addition to the SMF and TS7700 BVIR data, IntelliMagic Vision could also process information from a Tape Management Catalog (TMC)? Having this type of data available and processing it correctly is critical to answering the question “What’s using up all my tapes?”.

We’re all set up and distributed scratch lists. This is a necessary (and generally manual) part of maintaining a current tape library. It does require participation for compliance. Expiration Dates, Catalog and Cycle management also have their place to automate the expiration end of the tape volume cycle. This blog is intended to address issues that neither compliance nor automation address.

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SRM: The “Next” As-a-Service

Brett

By Brett Allison

You may have seen this article published by Forbes, stating that Storage Resource Management (SRM) is the “Next as-a-Service.” The benefits cited include the simplicity and visibility provided by as-a-service dashboards and the increasing sophistication through predictive analytics.

IntelliMagic Vision is used as-a-Service for some of the world’s largest companies, and has been since 2013. Although we do much more than your standard SRM by embedding deep expert knowledge into our software, SRM, SPM, and ITOA all fall under our umbrella of capabilities. So, while we couldn’t agree more with the benefits of as-a-service offerings for SRM software, the word “Next” in the article seems less applicable. We might even say: “We’ve been doing that for years!”

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Getting the Most out of zEDC Hardware Compression

Todd-Havekost

By Todd Havekost

One of the challenges our customers tell us they face with their existing SMF reporting is keeping up with emerging z/OS technologies. Whenever a new element is introduced in the z infrastructure, IBM adds raw instrumentation for it to SMF. This is of course very valuable, but the existing SMF reporting toolset, often a custom SAS-based program, subsequently needs to be enhanced to support these new SMF metrics in order to properly manage the new technology.

z Enterprise Data Compression (zEDC) is one of those emerging that is rapidly gaining traction with many of our customers, and for good reasons:

  • It is relatively straightforward and inexpensive to implement.
  • It can be leveraged by numerous widely used access methods and products.
  • It reduces disk storage requirements and I/O elapsed times by delivering good compression ratios.
  • The CPU cost is very minimal since almost all the processing is offloaded to the hardware.

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Game Changer for Transaction Reporting

Todd-Havekost

By Todd Havekost

Periodically, a change comes to an industry that introduces a completely new and improved way to accomplish an existing task that had previously been difficult, if not daunting. Netflix transformed the home movie viewing industry by offering video streaming that was convenient, affordable, and technically feasible – a change so far-reaching that it ultimately led to the closing of thousands of Blockbuster stores. We feel that IBM recently introduced a similar “game changer” for transaction reporting for CICS, IMS and DB2.

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The Circle of (Storage) Life

Lee

Storage Life Cycle

By Lee LaFrese

Remember the Lion King? Simba starts off as a little cub, and his father, Mufasa, is king. Over time, Simba goes through a lot of growing pains but eventually matures to take over his father’s role despite the best efforts of his Uncle Scar to prevent it. This is the circle of life. It kind of reminds me of the storage life cycle only without the Elton John score!

Hardware Will Eventually Fail and Software Will Eventually Work

New storage technologies are quickly maturing and replacing legacy platforms. But will they be mature enough to meet your high availability, high performance IT infrastructure needs?

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What Good is a zEDC Card?

BrettBy Dave Heggen

informatics inc: You Need Our Shrink!

The technologies involving compression have been looking for a home on z/OS for many years. There have been numerous implementations to perform compression, all with the desired goal of reducing the number of bits needed to store or transmit data. Hostbased implementations ultimately trade MIPS for MB. Outboard hardware implementations avoid this issue.

Examples of Compression Implementations

The first commercial product I remember was from Informatics, named Shrink, sold in the late 1970s and early 1980s. It used host cycles to perform compression, could generally get about a 2:1 reduction in file size and, in the case of the IMS product, worked through exits so programs didn’t require modification. Sharing data compressed in this manner required accessing the data with the same software that compressed the data to expand it.

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How’s Your Flash Doing?

By Joe Hyde

Assessing Flash Effectiveness

How’s your Flash doing? Admittedly, this is a bit of a loaded question. It could come from your boss, a colleague or someone trying to sell you the next storage widget. Since most customers are letting the vendors’ proprietary storage management algorithms optimize their enterprise storage automatically you may not have had the time or tools to quantify how your Flash is performing.

The Back-end Activity

First, let’s use the percentage of back-end activity to Flash as the metric to answer this question. Digging a little deeper we can look at back-end response times for Flash and spinning disks (let’s call these HDD for Hard Disk Drives). I’ll also look at the amount of sequential activity over the day to help explain the back-end behavior.

Below is 5 weekdays worth of data from an IBM DS8870 installed at a Fortune 500 company. Although it’s possible to place data statically on Flash storage in the IBM DS8870, in this case, IBM’s Easy Tier is used for the automatic placement of data across Flash and HDD storage tiers. Let’s refer to this scheme generically as auto-tiering. For this IBM DS8870, Flash capacity was roughly 10% of the total storage capacity. Continue reading

Flash Performance in High-End Storage

cor-m

By Dr. Cor Meenderinck

This is a summary of the white paper with the same title which was the Winner of 2016 CMG imPACt conference Best Paper Award. It is a great example of the research that we do that leads to the expert knowledge we embed in our products.

Flash based storage is revolutionizing the storage world. Flash drives can sustain a very large number of operations and are extremely fast. It is for those reasons that manufacturers eagerly embraced this technology to be included in high-end storage systems. As the price per gigabyte of flash storage is rapidly decreasing, experts predict that flash will soon be the dominant medium in high-end storage.

But how well are they really performing inside your high-end storage systems? Do the actual performance metrics when deployed within a storage array live up to the advertised Flash latencies of around 0.1 milliseconds? Continue reading