Oracle license compatibility was the deciding factor for us. It's the only way to fulfill the Oracle license policy if you want to virtualize in a x86 environment.
Also, Oracle VM performance is one of the best that I've experienced. And the pre-seeded images that Oracle puts at your disposal makes your life really ease, i.e. you can have an Oracle RAC up and running within two hours with the OVM images.
Improvements to My Organization
I work in a consultancy, so I've deployed several OVM environments always with great results and high customer satisfaction. We've achieved the goal of being in line with the Oracle license, providing customers with better usage of their resources at better cost.
Room for Improvement
The product needs to improve the backup and snapshot functionalities. This is the main disadvantage compared to other hypervisors on the market.
Use of Solution
I've used it for at least eight years since version 2.1 was released.
We have had no issues with the deployment.
We've never found an instability problem with the hypervisor as it is simply rock solid.
On the other hand, the OVM Manager has had some problems and inconsistencies. The best option is to have the OMV Manager virtualized and to recreate it if there are issues as all the relevant info is stored in the hypervisor itself.
We have had no issues scaling it to our needs.
Customer Service and Technical Support
Oracle always works well in terms of support, and if you need extra assistance you can escalate your case, but at the moment I have never had to go so deep.
The hypervisor installation and setup is one of the most simple things that I have ever done. Just boot, select the proper installation method, configure (Linux-like), and you're done.
On the other hand, the Manager can be a little tricky, but the newer versions have become much easier. Just set up your OS and pre-requisites, database, and OVM Manager.
I've implemented in my own company for internal use and as consultant engineer, I've performed several implementations for clients.
You always can get faster result going with consultancy services as they provide expertise and background from many previous implementations of the product.
Pricing, Setup Cost and Licensing
OVM has low impact and is licensed on a per-server basis. The cost is very affordable as you only have to pay support.
Other Solutions Considered
We evaluated VMware, Citrix, Hyper-V, and RHEV. The main feature was the "Oracle License Compliant" and after the wide library of images. The stability and efficiency of the hypervisor was always great therefore the previous mentioned factors comes to decide.
It's a great product and becomes better with every release. It is based on the rock solid Xen hypervisor.
It's an easy and great product. You can test it for free and you will have great flexibility in the x86 world. Go for it without doubt.