The difference between VMware and Virtuozzo Containers is more than just the name. Only hosting companies using VMware can offer complete flexibility, security and capacity, as well as options for high availability, load balancing and disaster recovery.A basic difference between VMware and Virtuozzo is that VMware creates individual virtual servers directly on the hardware, at a bare metal level, while Virtuozzo’s containers run at the operating system (OS) level.
All container environments running on the same physical hardware must share the same host operating system. This means that while each environment can run its own client OS, the one you can run on your virtual environment will be limited to those that are compatible with the host. Virtuozzo is limited to Linux or Windows at both the host and client level, and can only run a client OS on a physical server that uses the same host OS; in other words, a Linux client on a Linux host, and a Windows client on a Windows host. Of course, limiting the operating system also limits your choice of software to that available for Linux and Windows.
Running at the hardware level, VMware accomplishes virtualization by using a physical machine’s hardware resources to serve multiple virtual servers, each of which can run an independent operating system. In this way, VMware virtualization supports many diverse operating systems on any server system. This allows VMware to support a variety of Windows buy fullz and many different flavors of Linux, including Ubuntu, SuSE, and Red Hat, as well as non-Windows and Linux operating systems such as Solaris and Netware.
With Virtuozzo, because your virtual environment must run the same OS as the host, you don’t have the option to manage and modify your own operating system. The need for uniformity extends to updates-all environments must run at the same patch level. That means that if your virtual environment’s software has not been optimized for the latest Windows or Linux update, and your hosting company installs it (on the host system and across all virtual environments), your software may function poorly, or not at all.
With VMware, you can manage and modify your own operating system, as well as run different patch levels than the host system. This offers your company installation and update control on your virtual servers, and the freedom to use an extended range of software, software releases, and even multiple software flavors on the same OS, such as SQL Standard, Web and Express editions.
In Virtuozzo’s containers, when you need to reboot your virtual environment, such as during a test phase, you’ll have to wait for a scheduled system outage for the entire physical server, chaining you to your hosting company’s calendar. Using VMware, you can reboot your operating system when and as often as your situation requires.