KVM: Your Key to Open Source Server Virtualization
Sep 19, 2010, 15:04 (2 Talkback[s])
(Other stories by Ken Hess)
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"Considering a switch to a virtualized infrastructure strikes
fear into the hearts of even the most educated among today's CIOs.
Technology confusion and vendor choices aside, the
physical-to-virtual transition dread stems from security concerns,
performance uncertainty and scalability questions. Red Hat's Kernel
Virtual Machine (KVM) attempts to answer those trepidations
"KVM is Red Hat's commercial competition for Citrix XenServer,
Microsoft Hyper-V and VMware ESX/vSphere. Like the others, KVM is a
full virtualization technology. Full virtualization means that
virtual machines (VMs) built with KVM fully abstract computer
hardware, so the operating systems that run inside the VMs "think"
they're running on physical hardware. Memory, CPU, disk,
peripherals, NICs and graphics adapters compose VMs using full
"The first, and most heated, topic of discussion surrounding a
move to virtual infrastructure is security. Unfortunately,
virtualization and its husky sibling, cloud computing, have
received demon status among tech observers and industry sideliners.
Security is a major concern for anyone who runs a computing
environment, whether it is physical or virtual. VMs are not less
secure than physical machines; nor are they more secure. Their
status as virtual doesn't alter their security in any way."
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