Red Hat ENTERPRISE LINUX 5 - VIRTUALIZATION GUIDE Guida di Installazione

Dayle Parker Laura Novich Jacquelynn EastScott RadvanRed Hat Enterprise Linux 6Virtualization Getting Started GuideAn introduction to virtualization c

Chapter 1. IntroductionThe Virtualization Getting Started Guide introduces the basics of virtualization and assists with thenavigation of other virtua

Red Hat Enterprise Linux — Virtualization Getting Started Guide: This guide provides an introductionto virtualization concepts, advantages, and tools,

NoteAll of the guides for these products are available at the Red Hat Customer Portal:https://access.redhat.com/documentation/en-US/Red Hat Ent erpri

Chapter 2. What is virtualization and migration?This chapter discusses terms related to virtualization and migration.2.1. What is virt ualizat ion?Vi

An offline migration suspends the guest virtual machine, and then moves an image of thevirtual machine's memory to the destination host. The virt

NoteFor more information on V2V, refer to the Red Hat Enterprise Linux 6 V2V Guide.⁠Chapt er 2 . What is virt ualiz at ion and migrat ion?11

Chapter 3. Advantages and misconceptions of virtualizationThere are many advantages to virtualization and perhaps an equal amount of misconceptionssur

This is no longer the case; modern virtualization technology has greatly improved the speed ofvirtual machines. Benchmarks show that virtual machines

SELin u xSELinux was developed by the US National Security Agency and others to provide MandatoryAccess Control (MAC) for Linux. Under control of SELi

deployment suited to Red Hat Enterprise Virtualization may include databases, tradingplatforms, or messaging systems that must run continuously withou

Chapter 4. Introduction to Red Hat virtualization productsThis chapter introduces the various virtualization products available in Red Hat Enterprise

NoteFor more information on KSM, refer to the Red Hat Enterprise Linux 6 VirtualizationAdministration Guide.Q EMU G u est Ag en tThe QEMU Guest Agent

For host systems: https://access.redhat.com/site/articles/rhel-limitsFor the KVM hypervisor: https://access.redhat.com/site/articles/rhel-kvm-limitsFo

4.3. Virt ualized hardware devicesVirtualization on Red Hat Enterprise Linux 6 presents three distinct types of system devices to virtualmachines. The

Red Hat Enterprise Linux 6.1 and above provides an emulated (Intel) HDA sound device, i ntel -hd a. This device is supported on the following guest op

KVM provides two emulated PCI IDE interfaces. An emulated IDE driver can beused to attach any combination of up to four virtualized IDE hard disks orv

Windows Server 2008Windows 7Windows Server 2012Windows 8 (32/64 bit)T h e p ara- virt u aliz ed clo ckGuests using the Time Stamp Counter (TSC) as a

USB p asst h ro u g hThe KVM hypervisor supports attaching USB devices on the host system to virtualmachines. USB device assignment allows guests to h

To allow safe migration of virtual machines between hosts with different sets of CPU features, q emu -kvm does not expose all features from the host C

virtio-scsi is the recommended para-virtualized storage device for guests using largenumbers of disks, or advanced storage features such as TRIM.virt

Red Hat Enterprise Linux 6 Virtualization Getting Started GuideAn introduction to virtualization conceptsDayle ParkerRed Hat Engineering Content Servi

Logical volumes can be used for disk images and managed using the system's LVM tools.LVM offers higher performance than file systems because of i

Chapter 5. Virtualization ToolsThis chapter provides an introduction to the many tools available to assist with virtualization.5.1. vi rshvirsh is a c

5.4. g uestfi shguestfish is a shell and command line tool for examining and modifying virtual machine disk images.This tool uses libguestfs and expos

vi rt-ed i tA command line tool used to edit files that exist on a specified virtual machine. This tool isinstalled as part of the libguestfs-tools pa

WarningUsing vi rt-rescue on running virtual machines can cause disk corruption in thevirtual machine. vi rt-rescue attempts to prevent its own use on

vi rt-to pA command line utility similar to to p, which shows statistics related to virtualized domains.This tool ships in its own package: virt-top.v

Revision HistoryRevisio n 1.0- 15 Fri O ct 10 2014 Dayle ParkerVersion for 6.6 GA release.Revisio n 1.0- 12 T u e O ct 07 2014 Sco t t Rad vanApp

Added GlusterFS description for BZ #979271.Removed Hypervisor Deployment Guide from documentation list.Revisio n 0.3- 32 Mo n Sep t 2 2013 Dayle Pa

Revisio n 0.3- 8 T h u rs O ct 4 2012 Dayle ParkerAdded tech preview note about virtio-scsi in Ch.4 from SME review.Added QEMU Guest Agent descript

Revisio n 0.2- 6 4 Mo n Ap ril 2 2012 Lau ra No vichCorrections to Chapter 2 (BZ #800401).Revisio n 0.2- 6 1 Fri March 30 2012 Dayle ParkerMade co

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Preface1. Document Convent ionsThis manual uses several conventions to highlight certain words and phrases and draw attention tospecific pieces of in

C haracter T abl e. Double-click this highlighted character to place it in the T ext to co py field and then click the C o py button. Now switch back

before, " "so cannot be deassigned\n", __func__); r = -EINVAL; goto out;

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