Kernel-based Virtual Machine (KVM) vs. Oracle Solaris

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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It's good for environments that need to operate 24/7 due to its stability, as I mentioned before. It's also very good for enterprise applications that can't afford unscheduled downtime, for truly high-priority environments. I don't think it would be recommended for small companies with people who have no prior knowledge of the tool, as the learning curve is quite steep.

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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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• Preferred Operating System to run Oracle Databases
• Performs well with Java and Oracle applications
• Great for Virtualizations.

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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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• It seems that Solaris is becoming an afterthought at Oracle.
• Oracle should be more vocal in their commitment to Solaris
• Support Costs

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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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You need to take the time to learn it. It is a massive product.

The support teams are well trained and responsive. Patches are rolled out regularly and are easy to deploy and backout.

Stress testing and timing is key. You need test systems that mirror the live environments. User testing must be reflected in peak loads.

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 used Windows Server quite a bit because of the ease of use for the team, file sharing, Active Directory, and systems integrated with Windows; learning was easier, and the interface was more user-friendly. On the other hand, Oracle stood out for its stability because we provide services that keep environments up and running 24/7.

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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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• Possibility to migrate old servers protecting previous inversions
• reduces implementation times and accelerates time to obtain value in the market.

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