Top 10 Things You Must Read About Virtual Machines
Top 10 Things You Must Read About Virtual Machines
By Eric Siebert published: Wednesday, February 11 2009
You probably know what a virtual machine is but do you have a real good understanding of all the components that make up a virtual machine and how virtual machines differ from traditional physical servers. When administering virtual machines you need to be aware of the key differences from physical servers and the best methods for securing, administering, configuring and backing them up. This list consists of articles that explain the key components of a VMware virtual machine and how their virtual hardware differs from physical hardware. It also covers how to properly secure, configure and backup virtual machines and some additional information that you need to be aware of about virtual machine architecture.
An article that covers what a virtual machine is and the differences between the physical hardware of a host server and the virtual hardware that a virtual machine sees.
An article from Mendel Rosenblum on what a virtual machine is, the history of virtual machines, the different types of virtualization and detailed information on hardware virtual machines.
Timekeeping in VMware Virtual Machines
A VMworld 2007 presentation (free registration required) and white paper from VMware that describes how timekeeping hardware works in physical machines, how VMware products virtualize this hardware, and the various ways that guest operating systems use the hardware to keep time. They also cover a few known timekeeping issues and how to correct or work around them.
A security benchmark for virtual machines from the Center for Internet Security. This document describes potential threats to virtual machines and has guidelines for securing and protecting them.
A white paper from VMware that covers the descheduled time accounting component of VMware Tools that provides improved accuracy for guest CPU time accounting and improved guest OS timekeeping. It explains how to install and monitor VMDesched on Linux and Windows guest operating systems. It also describes timer interrupt virtualization issues resolved by VMDesched and how VMDesched works.
Documentation from VMware that provides information on different methods you can use to backup and restore virtual machines. It also describes how to setup and use VMware Consolidated Backup in your environment.
Documentation from VMware that covers how to plan a virtual computing environment that allows maximum mobility for your virtual machines. It covers key issues you must address when moving virtual machines that must be modified to run in the new environment. Topics include how to move virtual machines between different VMware products and versions, platform differences and cross-generation mobility.
A knowledgebase article from VMware that describes all the different virtual network adapter types that you can use in your virtual machines. It describes what each type is and under what circumstances it can be used.
A white paper from VMware that provides an overview of x86 virtualization, different techniques for CPU virtualization, memory and device I/O virtualization and the benefits of paravirtualization.
Eric Siebert is a 25-year IT veteran with experience in programming,
networking, telecom and systems administration. He is a guru-status
moderator on the VMware community VMTN
forum and maintains VMware-land.com,
a VI3 information site.
