CentOS Linux vs. VMware ESXi

I have been a CentOS user for over 10 years and remain loyal to the core OS. When it comes to stability and speed, there's no other OS I'd recommend over it. I base this recommendation on my personal experience, as I have multiple development and production servers running the CentOS software today. It's running on newer and older hardware with ease, and the price is right!

Incentivized

If you're looking for the industry standard in server virtualization, I would recommend ESXi. After decades of expertise in the field, VMware continues to provide a strong product, production-ready, with an easy-to-learn interface that allows for quick management along with less costly upfront onboarding and training. Grab the free personal-use license and install in your homelab to start!

Incentivized

• First of all, CentOS is one of the most secure and stable OSes straits from the box.
• High performance on the average hardware.
• In most of my scenarios—easy and quick deployment.
• Huge KB community that helps to build and support different services on CentOS.
• Versions lifecycle.

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• Incredibly quick to deploy. Total installation time of less than five minutes
• Able to easily mount ISCSI storage devices to VMWare ESXi hosts within the GUI
• Allows you to run the product for free - if you stay under the physical core count (and with some reduced features)
• Incredibly stable software - we have not run into any issues that were a direct result of VMWare ESXi being at fault
• Very low hardware resources utilized to run this product

Incentivized

• It's not as intuitive as it could be
• Some packages can be quite old compared with other distributions
• Breaking changes appear often when packages are obsoleted usually with no supported transition path (this is a general *NIX problem, but it's more accentuated in CentOS)

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• There are some odd issues with VMware's virtualized network drive (VMXNET3). On occasion, after a reboot of a Windows-based VM the NIC will fail to bind properly and network access is unavailable until an admin intervenes by disabling/re-enabling the adapter. While it's possible that our environment is a contributing factor, this never happens on VMs using Intel E1000 emulation, only the paravirtual NICs.
• Logging is extensive but difficult to work with. VMware's solution is a product called Log Insight, which comes at additional cost. Fortunately this is somewhat mitigated by the extensive support documentation and robust user community, but in the heat of the moment obtaining the required detail can be a trying experience.

Incentivized

It is critical to our business, what started out as a way to do certain functions, it has now become core to ensuring our product is available to our customers and reducing our costs to operate and reduce our recovery time and provisioning servers. Their support is great and the costs to renew is reasonable.

Incentivized

The interface is fairly intuitive for most things, and the areas that are a little less obvious usually have fantastic documentation in the online knowledgebase. In 3-4 years of managing our ESXi hosts, I think that I have only opened 4-5 support cases for things that I could not figure out myself or find answers to on the website.

Incentivized

Without the need to patch the servers with bug fixes and enhancements we whave not experienced any downtime with VMware issues. Even the bug fixes and updates do not cause of downtime as we just migrate the servers to the opposite node and update the one and then move servers back. Very simple and painless.

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We do not notice any difference between a physical and virtual server running the same workload. In fact we can scale quicker with the virtual server than we can with the physical.

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Again, written documentation is excellent, even on the older versions. The support community is the best. It is comprehensive and I would say that it global because it transcends national boundaries. Also, you find all types of people using CentOS to do all sorts of things so you are bound to find someone to talk to if there are problems.

Incentivized

I rarely ever need support for anything VMWare makes, but when I do, the documentation available just in the free community is generally enough. It's extensive and the community is truly robust and active. And if you have a myvmware account, you can get support for your owned products from VMWare support by the conventional case/ticket method

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Jsut read and follow anything your storage provider may require to allow the integration of VMware with storage operations, outside of that VMware jsut works.

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Ubuntu Linux is another candidate that we've evaluated. It stacks up well against CentOS Linux, however it does have some quirks we need to deal with such as package management and stability. For the most part, the server version of Ubuntu is stable, but we stick with CentOS Linux because it seems to have a slight edge over Ubuntu in that realm as well. I have colleagues at other firms that are wholesale Ubuntu server infrastructure, and they are very happy with it and Ubuntu is favorable there. With the changes that have occurred or may still yet occur at CentOS Linux, we may go down the path towards Ubuntu. But for now, CentOS Linux is where we are parked and will remain for the foreseeable future.

Incentivized

While Hyper-V also can work very well and can have licensing benefits, it does rely on Windows in order to run. This isn't necessarily a bad thing, but it can add another layer of potential failure and might not be running on as low of a level as ESXi does. The footprint for Hyper-V can be smaller if the Desktop Experience isn't used for the hosts, but this is the default fashion that ESXi has been running for many years. VMware's support has always been stellar, and its documentation is phenomenal. Hyper-V can work as a virtual environment option, but ESXi has never let me down in any environment I have managed. I will continue standing by this product and prefer it over other options. It has proven itself time and time again over time as the defacto virtual environment hosting platform.

Incentivized

We started out with a two-server cluster and adding a third or fourth is very straightforward and simple with no issues. You just need to be aware of the size of your Vcenter Server to handle the workload, but still the resources needed is very minimal

Incentivized

• Since CentOS is free, our developers and engineers can use it without regard for dipping into project budgets.
• We can spin up a CentOS VM, use it and then destroy it without having to worry about licensing headaches.
• CentOS can run on just about any hardware platform: server, laptop, old hardware, etc. so that makes it less expensive in that we don't have to buy specialized hardware for it.

Incentivized

• Positively, it has saved us time in spinning up new servers for the different departments in our company. It is easy for us to spin up virtual machines with VMware ESXi and deploy applications at the drop of a hat.
• Positively we are able to save space in our data closets as we no longer need to keep room for physical servers and workstations, allowing us to expand in other areas like networking equipment and physical backup solutions.
• It has moved our business forward as we are able to migrate old servers and static workstations in the virtual environment allowing us to easily keep an eye on older applications and update/backup easily through VMware ESXi management console.

Incentivized