Intro to Virtualization Andrew Hamilton TJ IT Technician.

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Presentation transcript:

Intro to Virtualization Andrew Hamilton TJ IT Technician

Theory Do one thing and do it well (UNIX philosophy) Compartmentalize Services Benefits of many systems in one

Advantages Security Access Control Upgrades Potential for High-Availability Clustering Resource management

Disadvantages Overhead Proliferation of systems Upgrades

Virtualization Types Containers – Very minimal overhead – Only one OS Paravirtualization – Minimal overhead – OS must support the hypervisor Full Virtualization – Runs almost anything – Often high overhead

Microsoft Hyper-V Full virtualization / Hypervisor Primarily Supports Windows Server Oses Free version available

Solaris Zones/Linux Containers Container Solutions Extremely low overhead Shares kernel with host OS VM Filesystems mounted in host system

Solaris LDOMs Full virtualization solution Only available on UltraSPARC servers Support for non-Solaris is iffy

Linux Kernel Virtual Machine Full Virtualization solution Leverages hardware virtualization extensions – AMD-V / VT-x Low overhead Works with most operating systems

Oracle Virtualbox Full Virtualization Works with most Oses Higher overhead Can use AMD-V/VT-x Primarily for desktop virtualization

Microsoft Virtual PC Full Virtualization Works with most Oses Higher overhead Some versions require AMD-V/VT-x Primarily for desktop virtualization

VMWare Full Virtualization / Hypervisor Works with most Oses Can use AMD-V/VT-x Well-supported

Xen Hypervisor Paravirtualization Low overhead OS must support Xen (primarily Linux) Can leverage AMD-V / VT-x

Example TJ Computer Systems Lab Xen Virtualization with Gentoo Linux 6 VM Servers ~25 VMs

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