– Bart's blog

IBM i and PowerVM features and tools

Category Archives: IBM i

HP StoreOnce VTL and IBMi

Few weeks ago I had a chance to test VTL functionality on StoreOnce devices in conjunction with IBM i. HP StoreOnce is pretty new product and I know that a lot of people is waiting for some information ‘from the field’. This is my short summary.

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Workload capping – reducing license costs on IBMi

Do you know that by using Workload Capping you can reduce license costs on IBM i Lpar? Read more of this post

Use link aggregation instead of VIPA on IBM i

In the past, the only option to provide redundant Ethernet on dedicated network adapters for IBM i was a VIRTUALIP ‘interface’. Starting with IBM i 7.1 TR3, there is a new feature called Link aggregation. It is much better and much easier for implementation than VIPA.

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POWER8 – No hardware maintenance-no firmware upgrade

Back in the day, downloading of a server firmware from IBM Fix Central website was limited only to users and serial numbers with valid IBM hardware maintenance contract. With POWER8 servers IBM put such a lock into the servers. Thus, if your hardware maintenance contract expired, you cannot install any newer firmware beyond this date. Read more of this post

IBM i lpar crashed duo to Dynamic Platform Optimizer

Dynamic Platform Optimizer is a hypervisor function which rearranges logical partition processors and memory on the system to improve the affinity between processors, and memory of logical partitions. In this post I will describe when to use this function and how to prevent IBM i Lpar from crash. Read more of this post

Perform a command across multiple IBM i systems

There is a very simple how to submit any IBM i command across multiple systems. The main requirement for it is the Management Central. Read more of this post

how to get ip address from hostname in CL (IBM i)

Today, I was preparing another program for automation. I need a function to retrieve an IP address of a remote system from the DNS having the system hostname. In the interactive session, you’d simple use ping or nslookup commands to resolve the hostname. But none of these commands can store the result into a variable. I did a short research, and there is very cool command Start DIG Query (DIG). This command can be used in a program, and it’s very easy get an IP address. Here is the example of a simple CL:

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IBM i with VLAN tagged network

Have you ever think to run your IBM i machine with in IEEE 802.1Q standard, and use the capabilities which offers VLAN tagging? You might heard that your AIX, LINUX colleagues already use it for ages, but for IBM i, this technology is still not available. Well, it is possible!  You can trunk multiple VLANs to one physical port, if you configure the POWER Hypervisor to handle this traffic. Read more of this post

Redbook residency – Austin 2014

Few days ago, I came back from IBM in Austin. It was my first time in Austin, homeland of POWER systems, chips, AIX and PowerVM development, but third residency in general. Read more of this post

Monitor CPU, POOL utilization from PHYP cycles

It’s important to know a CPU capacity used by a system. In IBM i world, we have a licpgm – 5761PT1 Performance tools. But what if you run other OS’s than IBM i, on the same POWER box. Or you run LPARs in different shared processor pools ? The most efficient might be tracking CPU cycles dispatched by the POWER Hypervisor. In this post I show you, how to interpret performance data collected by a HMC, and how to allow IBM i collects and display dispatched CPU cycles.

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