SAN Archives - IT Jungle

Sharing Tape Libraries Across Partitions Without VIOS

May 4, 2020 Alex Woodie

IBM i shops have a love-hate relationship when it comes to the Virtual I/O Server, or VIOS. With the latest IBM i Technology Refresh, IBM is giving the anti-VIOS group a feature they have been requesting: the capability to easily share a tape library among multiple logical partitions, or LPARs without involving VIOS, SANs, or multiple adapters.

IBM is calling the new feature “IBM i Virtualization for Tape Libraries,” and it’s based on RFE (request for enhancement) number 127631. While the words “tape libraries” and “virtualization” are in there, this is not a virtual tape library (VTL) solution. That already …
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Big Blue Makes Moves To Mainstream Db2 Mirror

May 4, 2020 Timothy Prickett Morgan

When IBM brought out its active-active Db2 for i database clustering extensions, called Db2 Mirror appropriately enough, almost exactly a year ago to improve the resiliency of databases and therefore the applications that run atop them on the IBM i platform, we had a few asks. As part of the April Technology Refresh announcements for IBM i 7.3 and 7.4, some of those asks are answered and it looks like another one might be in the works.

The two most important things that we asked for are related, and it is all about making Db2 Mirror available and affordable for …
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Cloud Walkers Makes LPARs More Native On IBM i

December 16, 2019 Timothy Prickett Morgan

There are a few different technologies that have been grafted onto the OS/400 and IBM i platform from the outside that are just architected differently from and run somewhat counter to the integrated nature of that platform, and all of them are involved, in one way or another, with managing logical partitions on the Power Systems platform and all of them make IBM i shops cranky.

They are, in no certain order: the PowerVM hypervisor, the Hardware Management Console (HMC), the Virtual I/O Server (VIOS), the PowerVC variant of OpenStack that is native to Power Systems, and external disk arrays, …
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The Skinny On NVM-Express Flash And IBM i

November 4, 2019 Timothy Prickett Morgan

A couple of weeks ago, buried in the October Power Systems announcements, we told you about the new NVM-Express flash cards that Big Blue brought to the Power iron and that are specifically enabled in the IBM i 7.4 release with Technology Refresh 1, or TR1. We didn’t have a lot of detail back then about the new drives other than some capacities and pricing, but we know more now and we are going to tell you what we know.

We will circle back with Big Blue and have a discussion about what the addition of NVM-Express flash means – …
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Does Db2 Mirror Kill The Market for Third Party HA?

May 6, 2019 Alex Woodie

IBM launched Db2 Mirror for i two weeks ago to great acclaim, as the clustering technology puts IBM i on par with how most other major systems provide continuous availability. But will Db2 Mirror destroy the platform’s heritage of high availability solutions? IT Jungle asked IBM and the biggest providers of logical replication solutions, and the answer is no. Here’s why.

The first thing to understand about Db2 Mirror is that, at heart, it’s a database clustering technology. IBM figured out a way to make a single instance of Db2 for i run on two separate systems, in an active-active …
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Drilling Down Into Db2 Mirror for IBM i

May 6, 2019 Timothy Prickett Morgan

We did our initial coverage of the new Db2 Mirror for the IBM i operating system’s integrated database two weeks ago, and now it is time to dig in a little deeper. Elsewhere in this week’s issue of The Four Hundred, we have gotten feedback from the suppliers of high availability clustering and disaster recovery software for the IBM i platform as to how Db2 Mirror compete with as well as complements their wares. And in this story, we will be digging a little deeper into Db2 Mirror itself.

As we explained, Db2 Mirror creates an active-active database …
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Melding System Monitoring And Capacity Planning

April 24, 2019 Timothy Prickett Morgan

(Sponsored Content) Installing a modern system to run enterprise applications is a pretty tough task, but the job is not done once the iron is in and the databases and applications are up and running. Sophisticated organizations, whether they are large or small, do sophisticated application and system monitoring to keep an eye on how things are running, they have job schedulers that synchronize work to optimize for performance as well as drive up system utilization, and they use all of the information gathered to better plan for the kinds of systems they will need in the future …
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Getting Hyperconverged On Power Systems

July 17, 2017 Timothy Prickett Morgan

A few weeks ago, when pondering the possibilities of how Big Blue might reimagine and reinvigorate the IBM i platform, we outlined how this might be done – and how it might apply to a much broader customer base after it was done – in an article called The Cognitive Systems/500 2018 Edition. We forgot one of the possible components of a modern, integrated system and, amusingly, IBM has just announced support for it.

The bit of the software stack we forgot to mention was what is called hyperconverged infrastructure, or HCI for short, and this server-storage halfblood has …
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IBM Bolsters Disaster Recovery With GDR For IBM i

May 3, 2017 Alex Woodie

IBM next month plans to start selling a new disaster recovery product to IBM i shops. Called Geographically Dispersed Resiliency, or GDR, the new offering is designed to give companies an easy and affordable way to recover production IBM i LPARs on remote machines. IBM’s resiliency guru Steve Finnes gives IT Jungle the lowdown on the new tech.

GDR provides DR protection by essentially taking a production logical partition (LPAR), also called a virtual machine (VM), from one IBM i server and restarting it on another IBM i server. The VMs involved in a GDR switch must be stored on …
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