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From the point of view of applications and [[container]] users, each container is an independent system. This independence is provided by a virtualization layer in the kernel of the host OS. Note that only a negligible part of the CPU resources is spent on virtualization (around 1-2%). The main features of the virtualization layer implemented in OpenVZ are the following: | From the point of view of applications and [[container]] users, each container is an independent system. This independence is provided by a virtualization layer in the kernel of the host OS. Note that only a negligible part of the CPU resources is spent on virtualization (around 1-2%). The main features of the virtualization layer implemented in OpenVZ are the following: | ||
− | * A [[container]] | + | * A [[container]] looks and behaves like a regular Linux system. It has standard startup scripts; software from vendors can run inside a container without OpenVZ-specific modifications or adjustment; |
* A user can change any configuration file and install additional software; | * A user can change any configuration file and install additional software; | ||
− | * [[ | + | * [[Containers]]s are completely isolated from each other (file system, processes, Inter Process Communication (IPC), sysctl variables); |
* Processes belonging to a container are scheduled for execution on all available CPUs. Consequently, [[CT]]s are not bound to only one CPU and can use all available CPU power. | * Processes belonging to a container are scheduled for execution on all available CPUs. Consequently, [[CT]]s are not bound to only one CPU and can use all available CPU power. | ||