IBM AIX vs. Red Hat Enterprise Linux (RHEL)

IBM AIX is well suited for mission-critical applications, especially the ones that need to run on well-performing hardware and need less downtime. It is also perfect for applications that need a lot of CPU, because AIX scales well on the IBM POWER hardware, so adding additional CPU almost always generates higher performance/throughput. IBM AIX runs unmodified from the smallest IBM POWER machine (S1022, with 12 Power10 cores) to the biggest machine (E1080, with 240 Power10 cores). Because IBM POWER systems have very fast CPU’s, you typically need a lower number of CPU’s when compared to alternatives. This may bring a reduction in cost for software licensed per core. Unfortunately, not all software vendors port their software to IBM AIX, so sometimes you may have to run Linux on POWER, or skip the POWER platform altogether. But many vendors happily support AIX and POWER.

There's a lot of things that can and can't be discussed. But as I mentioned earlier, cloud computing and on-prem, and very much like in the cloud, having a standard image ISO, deploying that, the configurations with Ansible or packages installed via Ansible, instead of just a Kickstart script, you have a set of scripts that run in a pipeline that deploy Red Hat. So I'd say the environments, every time I've used Red Hat Enterprise Linux as a computing solution has been, like I mentioned, reusable, scalable, positive. And I don't think I've ever found any situations where I wish I were using something other than Red Hat Enterprise Linux, because the support is not there for anything else as much as it is for Red Hat Enterprise Linux.

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• Stability. In the 14 years that I have used the product, I cannot think of a single time that we had an OS level failure. It is rock solid. We have had systems that have been booted and run for literally years without interruption.
• Virtualization. We run IBM AIX as LPARS on Power infrastructure. All of our AIX infrastructure is virtualized making it easy to scale as needed.
• Their logical volume manager makes the task of managing storage very simple. It is feature complete and they have mitigated much of the complexity that usually is inherent in LVM implementations.
• I have a love/hate relationship with Smit. It is their administrative interface. It is very powerful and very complete which is why I marked it as a pro. It is also a bit clunky and somewhat arcane in its interface but still usable.

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• Virtualization, like the operating system level task. I see this product is very good and it blends very well with the middleware components like all the JBoss and other things. And other than that, either you install it or a virtual machine or physical servers, it works seamlessly anywhere. And if you want to go further, like Red Hat OpenShift or those things also work very nice with it.

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• A lot of the built-in commands have not been updated in years. If you're used to some fancy CLI options in Linux, you may be out of luck with AIX.
• Out of the box, you cannot run open-source Linux utilities on AIX. There is a toolbox you can install, however, it's not the same versions as you would get in different Linux flavors.
• Tab completion for files and Up arrow to re-run previous commands don't work out of the box without running a Korn shell. A small annoyance, but one that catches me every time!

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• Red Hat Enterprise Linux (RHEL) needs better built-in developer-centric tooling.
• The desktop experience is too barebones, which makes it less attractive for developer workstations.
• Red Hat Enterprise Linux (RHEL) needs to be integrated and available in GItHub Actions as a supported platform so code developed on GitHub can be tested and qualified there.

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We find RHEL to be a superior OS with stable operations and long life. It is also easier to use and fix then most other OS's.

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AIX is robust, helps the systems administrator, is built to prevent easily made mistakes. If you are used to other variants of Unix (in particularly Linux) there is no steep learning curve to get started with AIX. You need to learn the intricacies of the operating system, but that is true for any new operating system. AIX has built-in tools for almost anything you want and has the AIX Toolbox (on the web) for tools that are not included with AIX by default, but can be installed. Installation of AIX is modular, you can select with components and features you want to have installed. Installation of additional components (and usually also removal of installed components) is easy and straight-forward.

It's pretty intuitive and easy to use. Everything is adjustable; everything is customizable through a set of yaml's and everything can be undone and re-done. Doing items such a modification and restarting the single app doesnt take down the whole operating system like one of the more popular GUI based operating systems. We can work on live production systems without breaking into a sweat.

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Product support and regular patches.

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As with any OS enhanced testing will need to be done prior to application integration.

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There is lots of documentation out there for AIX. On the times I've had to address a hardware issue, IBM's support has been great.

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Red Hat support has really come a long way in the last 10 years, The general support is great, and the specialized product support teams are extremely knowledgeable about their specific products. Response time is good and you never need to escalate.

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Don't be afraid of it, its easy to install and configure for the tasks needed.

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IBM AIX operating system is advanced with most features and also it's more reliable unlike Redhat Linux, Sun solaris, HP-UX and also we will have well support from the vendor if we run into any issues. IBM AIX is more user-friendly when compared to linux and easy to use so i would prefer the customers to have their operating system as IBM AIX for companies who has more customers.

Windows Server can take a long time to patch, waiting for the patch to install, then waiting to apply, after the OS is rebooted it can also take additional time to apply the update. Often times Windows Server patches can fail, leading to long troubleshooting times and application outages. Red Hat Enterprise Linux (RHEL) Patching is extremely quick, I've honestly not seen a Red Hat Enterprise Linux (RHEL) update fail to install in many years of Red Hat Enterprise Linux (RHEL) patching.

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Operational ease of use backed by support

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• IBM AIX on Power hardware has been the backbone of our most critical applications.
• The versatility of IBM AIX virtualization has been extremely useful, scalable, and provided configuration with redundant dual VIO servers.
• IBM AIX is not Linux so special skill sets are needed to actually manage the systems. Finding qualified engineers can often be a challenge

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• It has done wonders for my career because I come from a Linux background, HPUX, Solaris and AIX. So made this transition to Linux 20 years ago. So it has really put my career at the forefront of what we do in the company. We're still primarily a window shop, but with Red Hat and what they're doing with the Kubernetes integration with OpenShift, with the East Satellite Management, the Ansible stuff, all based on Red Hat. It's taken off at my company and we're very happy about it.

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