Virtualization is the process of using software to create a virtual resource of something; usually, it refers to hardware virtualization, the act of running an operating system (referred to as guest) inside an host system.

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Running one OS per core

I'm interested in using a COTS board like the Wandboard for a project. On one hand I'd like to use something like Ubuntu for user interaction, sounds, TCP/IP stuff, etc. But I also need an RTOS like ...
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2answers
227 views

Can I have a bridged interface without an IP?

I have 2 NICs: eth0 & eth1 on a host OS which runs some VMs (LXC) under it. The hosts eth0 is connected to a private network and configured as the primary interface. The hosts eth1 is connected ...
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2answers
370 views

How to add a ms-dos partition table to a loop device?

I recently made a dd from a disk partition. I want to use it as a disk in a virtual machine. I can't because the disk has no partition table. Can I had a partition table to a loop device? how? ...
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1answer
110 views

Help understanding interfaces in Backtrack

I am fairly new in UNIX and have recently installed backtrack on a VMWare box on my machine and I am trying to use DHCLIENT command but am having trouble in understanding the interfaces. I am ...
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1answer
49 views

memory buffering in virtual machines

Is there any point to doing disk buffer caching in a virtual machine, if the hypervisor OS is doing it? I wonder if buffering in the VM will just waste memory that could be better allocated to VM use, ...
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0answers
187 views

How to manage 2 vm using upstart?

I use an upstart script to monitor a vm and respawn it when it gets killed. I would like to simulate a failover by doing the following. Create a clone of the VM1 say VM2. When either of them is ...
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0answers
456 views

Xen is unable to use URL's to install CentOS

I can't seem to use URL's when using the netinstall for CentOS, I'm installing CentOS on a Xen VPS. I keep getting this error in the terminal window, when I use the URL: ...
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1answer
394 views

vmstat on virtual machine and large values

Hi I'm using vmstat to track machine performance during some tests (jmeter). This is virtual machine running on a big machine where lots of other virtual machines are installed (about 20 virtual ...
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1answer
189 views

Xen error on CentOS

During the creating of a new virtual server in xen using this command xen-create-image --hostname=minecraft.koanhosting.com --ip 87.98.249.146 --install -method=debootstrap But I keep getting this ...
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2answers
43 views

Running -march optimized software on another architechture?

I'm running an Athlon64 server with LFS and would like to have a local copy of the server in a virtual machine for testing purposes and building software. My PC uses an i7 and the existing server ...
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1answer
118 views

High-latency VM-centric workstation, vs. low-latency, (but, hack-ish) configuration for Oracle 11g

tl;dr Low-latency native (i.e. VM-less) development workstation vs. higher latency VM-centric workstation? Hey StackExchange, I'm unsure of whether or not I should be using a VM for development, as ...
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3answers
696 views

How to access a KVM virtual-machine?

I've created a KVM VM using virt-install. There is an image file in the directory /ssd/kvms. How do I access the virtual machine and turn it on? Do I need to assign an IP address, and if so, how do I ...
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0answers
69 views

list of vitualization technology that run on linux [closed]

We decide to select a solution for virtualization. Is there any benchmark for comparing them by eachother? I have list of vitualization technology that run on Linux
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2answers
1k views

Installing Freebsd as guest OS on kvm without using VNC

I want to run Freebsd as a guest OS on kVM running on Ubuntu server 10.04. All howtos mention VNC as a necessity to start and finish the installation process. Can I install freebsd on kVM without ...
3
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0answers
1k views

PCI passthrough with Xen

I am trying to run Windows XP in a Xen DomU virtual machine with a PCIe device, for which there are no Linux drivers, being passed through from a Debian Squeeze Dom0. My hardware supports ...
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0answers
179 views

Setup Cloudmin on Centos installed in LVM

I installed CentOS 6 with default LVM partition pattern. according to this pattern Can I use Cloudmin and store KVM Disks in LVM as Logical Volume? I think Cloudmin requires creating new logical ...
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1answer
10k views

Do VirtualBox or VMWare use the Intel VT-d feature?

I'm thinking about a new laptop, which has Intel VT support, but recently I discovered a feature other than Intel® Virtualization Technology (VT-x), which is Intel® Virtualization Technology for ...
5
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1answer
899 views

Does quiesce exist for Linux?

Quiescing a file system allows you to make a backup of the database while it is still running and other programs and their data as well. The application generally needs to be notified of the quiesce ...
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1answer
1k views

kvm doesn't load Windows 8

I'm launching kvm with the following parameter: kvm -m 2g -smp ncores=2 -hda disk.img -cdrom win8.iso My CPU has VT support and enabled, EDIT I seems to have limited emulate type: pc ...
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1answer
178 views

Destroying KVM first try virtual machine

I'm trying to understand how KVM works, working on ubuntu 10.04 server. I created one with sudo ubuntu-vm-builder kvm lucid --arch 'amd64' --mem '512' --rootsize '10248' --swapsize '1024' ...
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2answers
288 views

Prevent hacking the grub.conf using a 'live rescue' from a live linux iso

It happened that I had set the grub password in grub.conf. But, using a live linux iso, I was able to delete the password from the grub.conf. Please read the steps for the same mentioned in this link: ...
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1answer
73 views

Where to find info on how to set up a vm in redhat 7.2

I have a RedHat 7.2 server that was set up by someone else long ago as an e-commerce server. It is still in use for that purpose and I dare not make significant changes to it as my Linux-fu is weak. ...
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1answer
537 views

How to compile kernel for KVM guest (without paravirtualization)?

So I have a KVM machine, where I run an Ubuntu 12.04 (server edition). I want to compile a minimalistic kernel for the KVM guest, but I only found the howto for hosts, and guests with ...
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257 views

Configure vmware-tools without an initrd image?

Is it possible to run vmware-tools without an initrd? I don't know why I should use an initrd and it makes my kernel compilation more complicated. I can boot into my kernel without initrd but when I ...
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0answers
614 views

KVM network bridge and public static IP for both host and guests [closed]

I have a Debian Server with 4 public static addresses. There is a KVM guest (also Debian) installed and running. What I want is to give the guest an IP of the host, so that both machines have public ...
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1answer
2k views

Bridging ethernet interface

I have a server with 4 public IP's. I have it with this configuration and I want to bridge the interface eth0 for using it with KVM: So, I have 3 IP's (A.B.C.144, A.B.C.145, A.B.C.146) and another ...
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2answers
1k views

Tools for Monitoring Steal Time (st)

We're running on a virtual "dedicated" server, which should, in theory, mean that we're the only guys on the server. In practice.... I'm thinking we might not be. Notice that although it looks ...
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1answer
428 views

Running a query without the OS cache

I want to emulate a client site who doesn't have much caching because they have so much I/O all the time. I want to run a SQL query on my machine (on my VM to be precise) with the same limitations ...
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2answers
382 views

What to do when ubuntu-vm-builder completed?

I already have the VM (Xen based) installed, but the Xen config used specified "Linux kernel" as "None". The exact command line was: ubuntu-vm-builder xen precise -v --debug --addpkg openssh-server ...
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2answers
3k views

Are there any virtualization solutions for OpenBSD that aren't from ports?

I'm searching for a virtualization solutions for an OpenBSD host and a CentOS guest. What are my options? I'm searching for one that doesn't use packages from ports. Are there any?
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0answers
129 views

Getting from proficient to expert [closed]

I've got my vacation coming in and thought I might use that for something useful. Essentially, I've been a Linux user since around 1995 when I installed Slackware 2.0 on my computer and have been ...
4
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2answers
679 views

VM benchmark tools?

I would like to benchmark of few XEN-constallations: PV DomU HVM DomU with PV network and disk drivers HVM DomU with emulated IDE and PV network The base will be the same VM with the same ...
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1answer
1k views

How to increase Xen guest CPU utilization?

My Xen dom0 is a Gentoo x64 pvops. I boot my guest Gentoo, in PV mode, system with the same kernel my dom0 uses. When I emerge in the guest system, building a CPP package, I am experiencing low CPU ...
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1answer
589 views

Xen domU fails to start with kernel panic

My dom0 is Gento 3.3.2, the kernel is compiled with Xen support. And I am planing to use the same kernel to boot my domU. This is my domU configuration file: 1 vif = [ 'bridge=xenbr0' ] 2 vcpus ...
2
votes
1answer
2k views

PCI passthrough without VT-d

My CPU is Intel T9300, it supports VT-x, but it does not support VT-d. I am using Xen pvops virtualization. I have a PCI device, and my host system can work without it. So I am thinking if it is ...
2
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1answer
2k views

How to convert Windows 7 partitions to qcow2?

I know I can use qemu-img tool to convert a raw partition into a image file. But Windows 7 has two partitions. I tried: qemu-img convert /dev/sda1 /dev/sda2 win7.qcow2 But the generated file does ...
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0answers
548 views

Debian VPS, no loop devices present, modprobe fails

After acquiring a new virtual Debian squeeze I ran into a problem regarding loop devices. My plan was to set up an encrypted FS in a regular file and mount it. Unfortunately I can't do that since ...
3
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3answers
477 views

Problem with mount namespaces under Fedora

I've run into an odd problem regarding mount namespaces on Linux. I have two systems, both X86_64 running kernel 3.2.3-2 under Fedora 16. I am attempting to mount a tmpfs filesystem in a child ...
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6answers
293 views

How can I be sure that my server is not virtualised?

How can I make sure that my Linux server is running on a non-virtualised real box? This is the scenario I am thinking of: I install some distro on a rack-mounted server, I rent some rack space on ...
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0answers
29 views

How to access the data stored in guest operating system(i.e Virtual machine) from Host system [duplicate]

Possible Duplicate: Share memory between a virtual machine and the host I wanted to access the data stored in virtual machine from my host machine. I know that each VirtualMachine will have ...
3
votes
1answer
224 views

Custom live distro - ways to detect it is running inside virtual machine (or prevent running in VM altogether)

I am creating a custom live distro that will be a specialist work environment for those of my employees that are on the road. I am looking for ways to detect or, ideally, prevent my live distro from ...
5
votes
8answers
2k views

WebGUI for Virtualization?

Are there any virtualizations that can be accessed via a WebGUI too? I mean the administration part is enough on a terminal, but we need a virtualization/webgui solution for "customers". So that ...
2
votes
1answer
85 views

Access times for different partitions on same hard disk

I have partitions, /dev/sda1 and /dev/sda2. / is mounted on /dev/sda1, while all other data is on sda2 which has more size allocated to it. I want to save the virtual machine images (VirtualBox ...
7
votes
1answer
607 views

Lightweight virtualization on Linux with user isolation

What Linux-on-Linux virtualization technologies provide user isolation? Specifically, I want root in the virtual machine not to have any privilege on the host. This was not the case for LXC, but was ...
0
votes
2answers
172 views

A reliable and free way to use Linux on Windows, multiprocessor and x86_64

I need a reliable and free virtual machine to run Linux on Windows, multiprocessor and x86_64. I need a good environment to compile and run ffmpeg and libvpx. I have used Mint Debian under Virtual ...
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1answer
4k views

How to check if VT-X is enabled in BIOS?

How to check if VT-X is enabled in BIOS? I have vmx in CPU flags, and no access to the BIOS. (I need to install a KVM VM on RedHat Enterprise Linux 6.1).
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votes
1answer
518 views

Do I need hardware support for KVM for virtio paravirtualisation

Unfortunately I need to run virtual system on the machine without hardware support for visualisation. From kvm page I read that kvm is needed however it is not mentioned whether they mean the kernel ...
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0answers
141 views

VirtualBox appliance import locks up system

I have a Windows Vista x64 appliance that I am trying to import into the Open Source Edition of VirtualBox on Linux Mint 11 x86-64. The ovf file is 21.3 GB in size. The problem I am having is that ...
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1answer
658 views

VirtualBox disk performance?

This option was newly added to latest version of VBox , googled a lot , seems no much information was revealed , could anyone please help me pick one disk format ? Which one owns better performance ...
2
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1answer
346 views

Will VMX cpu flags increase the speed of virtual machine software , like VirtualBox?

On some CPUs, if I run grep vmx /proc/cpuinfo, I can see a vmx flag under the features entry. Will this feature speed up virtual machine software like VirtualBox?