Kernel-based Virtual Machine (KVM) vs. VMware NSX

KVM is the best solution in the case you need to test and turn up any virtual environment with limited vCPU/RAM resources. The obvious area of its use is a network environment when we want to avoid being tied to one type of hardware/vendor and being able to swap from one instance to another with no downtimes. The use of a vSwitch (that supports VLAN tagging) is a significant bonus for network engineers that some other hypervisors do not provide.

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With proper design, VMware NSX can and should be deployed to virtually any VMware virtualization environment, but the deployment should be tailored to the needs of that environment. There isn't really a one size fits all deployment design for all environments. That versatility is what provides its greatest strength to a business.

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• KVM is really good at providing fast and reliable virtualization for Linux guests
• Since KVM is a kernel module, every VM is a Linux process which can be managed by Linux system tools
• KVM integrates very well with the management framework libvirt, which is why KVM can be integrated in automation tools as well

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• End to end encryption on the wire.
• Micro-segmentation.
• Integrates well with existing VMWare environment.
• Integrates well with our existing network.

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• KVM itself doesn't ship with a management interface
• KVM itself is a bit complicated to handle
• KVM needs Qemu to virtualize Windows guests

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• Interoperability in multi-vendor environments
• Advanced networking and packet acceleration options can be improved

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It does the job and stays out of the way. The specifics of usability relies on the implementation, but with things like Icarus and libvirt, things are standardizing nicely.

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It is a very reliable solution that can be used for x86 architecture virtualization with low overhead. It is a free and open source software. Easy to use withOpenStack.

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We use both Cisco ACI and VMware NSX, and while they have different strengths and capabilities, I would recommend VMware NSX, as it can be used in all VMware environments, without costly physical infrastructure changes. Cisco ACI provides some of the same capabilities, but not all. It's focus relies on physical networking changes.

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• Fast provisioning of new servers.
• Huge drop of the cost of servers compared to bare metal.
• Easy upgrades of resources, sometimes now even requiring a server restart.

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• Ability to move workloads more easily with the ability to stretch/move networks across multiple physical locations.
• The added flexibility allows you to expedite tech refreshes since you're no longer constrained by the hardware.

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Independently Invited by TrustRadius

A de minimis incentive was given to thank the reviewer for their time. The incentive was not used to bias or drive a particular response, nor was the incentive contingent on a positive endorsement. More Info