Oracle VM for X86 basic concepts

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Types of Virtualization

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Terms in this set (70)

Hardware Partitioning
OS Partitioning
Host Based Hypervisor
Bare Metal Hypervisor

With HW partitioning we slice the server into several isolated components (cpu, power supply, storage, etc). The bus server is splitted into a logical way, so is presented to the OS as a specific hardware unit.
Example of this architecture are the M5, M6 , E6500 Sparc Lines of servers

Some benefits
- High Isolation
- Different OS versions

Some disadvantages
- Expensive and propietary hardware

OS Partitioning

With OS partitioning we can have moderate isolation and similar OS versions installed.
The guest domains share the OS kernel and some common OS resources
One examples of this technologies are Solaris Containers/Zones and FreeBSD Jails. They offer scalability at an affordable price, not so tied to hardware arquitecture

Host Based Hypervisor

A software layer is added to the OS, to handle with the guest domains. It's easy to use , primary used on desktops (Vmware Workstation. Mac Parallels, Virtualbox, among others). Useful for simulations.

Provides a poor performance

BareMetal Hypervisor

In this type of VM, the server run a small bootable OS with a form of Hypervisor (Xen Hypervisor or modifications). This Hypervisor manages all server resources (CPU, memory, and I/O).
Offers excellent isolation, affordable multisource hw and mix OS versions.
Examples of this VM types are : Oracle V, Microsoft Hyper-V, Vmware ESX and Citrix XenServer