A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system. It is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine.

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Hyper-V and AD --> recommendations for small site? [closed]

I have a dilemma about how to proceed with new AD / Hyper-V installation and would appreciate your views, experience and advice. Situation: we are a small company with single site (25 users) and few ...
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4answers
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How to troubleshoot performance issues of PHP, MySQL and generic I/O

I have a WordPress based website running on a shared hosting. Its response time is very decent (around 2s to retrieve the HTML page and 5s to load all the resources). I was planning to move it to a ...
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2answers
1k views

How to backup ubuntu server and restore on a new computer

I have a dedicated (virtual) server, to which I have only SSH access to. I would like to backup/clone the server to my local virtual machine. I tried to backup with tar all the essential files, but ...
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4answers
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How to distribute a virtual machine to allow users to try out a dependency-heavy program?

I have written a piece of academic software that has many third-party software dependencies (and requires a RDBMS). I would like to create set up a Linux virtual machine image preloaded with all the ...
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2answers
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Hyper-V - Creating a large fixed disk - EXTREMELY Slow

Hey everyone, after posting another question here, it seems I have to create a fixed disk in order to get one 700GB. I have shut down the machine (which basically has nothing on it), and gone to ...
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5answers
626 views

Deploying virtual machines - Windows Guest/Linux Host or vice versa?

I'm looking to deploy several virtual machines for users. They need access to both Windows and Linux. They also need to use the computers graphics card (for Photoshop, modeling, etc) under Windows. ...
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1answer
16k views

How to change a VM from split across multiple .vmdk files to a single one or two?

I have a VM with 3 partitions. One main one, one for swap space, one for storage. However, there are dozens of .vmdk files. Some of those .vmdk files are very large (over 1 GB), but the majority ...
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2answers
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Virtual Audio Cable not working on Windows Server 2008 R2

I have Virtual Audio Cable successfully installed on my Windows Server 2008 R2 SP1 x64 virtual machine. It seem like driver works (new audio device in Device Manager group and VAC control panel works ...
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1answer
7k views

Why are virtual machines on vSphere 5.0 suddenly suspended?

We just got our vSphere 5.0 and vCenter Server 5.0 configuration working with several VMS. These are the vms. Jenkins appliance. vCenter Server Appliance Windows7x64 Windows7x64-1 Windows7x64-2 ...
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2answers
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How do UEFI and virtual machines relate to each other?

I am trying to get my head around UEFI (Unified Extensible Firmware Interface) and it's not entirely clear to me how this affects virtual machines. Thus, there are three parts to this question: Is ...
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2answers
423 views

Duplicating an ESXi host to another ESXi host as a backup solution

I have an ESXi host with the following virtual machines: 1 x Active Directory Server 1 x Remote Desktop Services Server 1 x SQL Database Server 1 x Accounting Software Application Server I have a ...
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4answers
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Virtual (ESXi4) Win 2k8 R2 server hangs when adding role(s)

I'm trying to provision a 2k8r2 Enterprise server in ESXi4. The OS installation goes fine, VMware tools, adding to domain, updates. All the basic stuff before you start adding Roles and Features. ...
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1answer
271 views

How to protect an appliance from unauthorized copy?

At the company I work for, we plan to build an appliance to simplify the deployment of our products. We will probably run a VM with docker containers underneath (containing the products) and a web ...
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3answers
99 views

Virtual Server Memory not a power/multiple of 2

In the old times (before virtualization), memory came in powers/multiples of 2, because that is the way memory is manufactured. Nowadays that we create virtual servers that don't have real physical ...
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2answers
122 views

MS Exchange p2v process

Is that possible to virtualize MS Exchange Server 2007 without stopping it's services? In particular I'm interested in using VMware vCenter Converter Standalone Client for that purpose.
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5answers
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Convert my Vista installation into a virtual machine

I am a bit of a newb with virtual machines, so go easy on me. I am currently dual-booting Windows 7 and Windows Vista. I want to convert the Vista installation into a virtual machine, and then remove ...
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2answers
347 views

NTP running, server time is wrong on VM

The server time was 7 hours off (instead of 10AM it was 3AM, even though date showed the correct timezone). The output for ntpq was: $ ntpq -p remote refid st t when poll reach ...
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2answers
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(Eucalyptus, KVM) Why we need to split a VM into kernel image, ramdisk image, and disk image?

I'm new in using cloud computing technologies. There is a popular cloud software called Eucalyptus. I found that the way to start a VM in Eucalyptus is very different from Virtualbox. In Virtualbox, ...
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2answers
537 views

How do I create a team in ESXi Server?

I have three VMware Workstation 7.03 VMs collected in one team that works great on Workstation 7.03. I would like to convert/transfer the team to ESXi (I have a working host) but the VMware Client ...
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1answer
117 views

Qemu+libvirt+kvm significant performance lag in VM's

I am troubleshooting poor performance on our new VM host machine which is a Dell PowerEdge R415 with hardware RAID. We've got about 20 VM's running like this: qemu-system-x86_64 \ -enable-kvm \ ...
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1answer
66 views

Using Virtual Machines to Test Driver Deployment

In SCCM 2012, we're currently deploying device drivers during OSD via task seuqnces, using the "Auto Apply Drivers"-step. Our company uses workstations and laptops of several different makes and ...
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1answer
566 views

Need to move VM to another host with different cpu

I currently have a VM configured with CPU 1 socket & 8 cores per socket. I need to move this VM to another ESXi 5.5 host which has 2 CPU sockets with 6 cores per socket. Will I will able to run ...
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1answer
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How to move Hyper-V virtual machines to Azure with minimal impact?

My company is in the process of transitioning some of its on-premises services to the Microsoft cloud; some of them are being replaced altogether by hosted services (Exchange, SharePoint); some other ...
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1answer
64 views

Virtual Server HDD shrinks without apparent reason

We have a virtual hosted Linux server, and in the last few months every now and then the HDD shrinks from 400GB down to the exact byte count that is in use. All existing data can be downloaded and ...
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3answers
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How can I run Rackspace images locally?

As the title says, I regularly download my Rackspace images for backup of my VPS, however I'm wondering if it's possible to run them locally on KVM (for example) so I can run tests on my application ...
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2answers
293 views

Hardening Virtual Machine

I have a CentOS based product I'm looking to distribute it as a virtual machine (VMWare, XEN and KVM) and I have been lately assessing the steps needed to protect the VM. The VM's data shouldn't be ...
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924 views

How to keep track of vm hosts and guests and IP addresses?

Internally, we have several VM hosts. We are constantly provisioning new guests on these hosts. What tool to you guys use to keep track of what hosts hosts you have out there, the host system stats, ...
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246 views

Performance of Virtual machines on very low end machines

I am managing a few cheap servers as my user base isn't large enough to get much more powerful servers. I also don't have the money lying around to invest in a server to prepare for the larger user ...
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1answer
910 views

Running Debian as guest operating system on a Hyper-V VM

Layer-9 considerations are prompting a migration from Citrix XenServer to Hyper-V as our shop's virtualization platform of choice. This will require me to migrate our existing virtual machines from ...
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3answers
215 views

What's the best way to work out if a virtual server is overloaded?

I have a series of virtual servers. I'm running a command to login to each one and take a look at the load averages using uptime. What's the best way to work out if load values represent overloading? ...
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2answers
379 views

How can I keep important VMs in memory without disabling swap?

VM Host -> Xenon E5-2440 w/ 48G mem... Everything runs CentOS6.5 (2.6.32-431) I have 4 guest VMs running each w/ 2G of memory. Their disk images are local files. The host machine is also running a ...
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How to edit/add file in VMDK

I have a VMDK (with several partitions) file which I need to modify. It is not attached to any particular virtual machine. I've tried using vmware-mount (from the VDDK toolset) in on Ubuntu server ...
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533 views

Use SSHFS on XenServer 6.1

On Xen Server 6.1, to backup my VMs, I use a script based on the following tools: xe vm-list to build a list of the VMs to backup xe vm-snapshot to take a snapshot of the VMs xe template-param-set ...
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1answer
284 views

Sync virtual machine hostname to displayName in VMware ESXi 5.1

How can I read the paramater called displayName in the .vmx file or "Virtual Machine Name" in vSphere Client from within the VM. If this is possible with vmtoolsd I haven't found it yet. ...
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1answer
309 views

VM Partitioning

If this isn't the right place to ask this please redirect me. I'm using hyper-v to create virtual machines, I have 1.6TB to use, I have the parent on a partition of 50GB, how should I divide up the ...
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Can you operate a lmgrd license server on a linux VM?

We are running the lmgrd license server on a bare metal linux system. From my understanding, a Linux-based lmgrd uses the MAC address of the primary ethernet board as the parameter from which the ...
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3answers
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Blocking VM's network temorarily from host machine in KVM

I am trying to perform few changes to a running VM's MAC address and obtain new IP address. Currently the VMs are connected to the outside network through the host's bridge interface. I would like to ...
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2answers
355 views

ESXi / OpenSolaris / ZFS / Linux

I've been using my Opensolaris BOX for while, with 6 internals drives under ZFS. More recently I've been playing with ESXi and i've got to say this platform is amazing; therefor my plan is to buy a ...
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1answer
877 views

ESX shut down VMs when some but not all storage paths failed

I've been on hold now for an hour waiting for VMware support and am betting serverfault can beat them to the answer! I am running ESX 4.0 and 4.1 on 6 HP blades, using FibreChannel LUN storage. We ...
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Hyper-V performance comparisons vs physical client?

Are there any comparisons between Hyper-V client machines and their physical equivalent? I've looked around and can find 4000 articles about improving Hyper-V performance, but I can't find any that ...
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Problem booting virtual machine after converting VMDK to VHD

I used the VMWare VCenter Converter Standalone Client to convert a physical drive on my old PC to a virtual drive. The conversion worked fine and I ended up with a valid VMDK file. Next, I wanted to ...
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2answers
322 views

ESXi 4.1 VM gone after hard reboot

I have a serious problem here. After I forced a reboot of a freezed ESXi 4.1 server, a VM is literally gone. When I ssh to the host and run ls -lah inside the datastore, it returnes: ...
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1answer
619 views

Limit httpd.exe CPU usage

We are using Collabnet Subversion Edge in one of our VMs, and occasionally one of the httpd.exe processes spikes to ~100% and just sits there. I believe it's interfering with our overnight backup ...
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1answer
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Performance issue of Server 2012 VM on ESXi 5.1 U1

I'm having issues with a VM, as stated in the topic, that runs on ESXi U1, build 1065491. The machine is sluggish and i can't figure out why.. Here's the details. It runs on a Dell T420, has ...
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1answer
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Terminal Server CPU usage at 100%

I'm running a terminal server with around 50-60 users,and every so often the server will go from > 40% usage to 100%. I took a closer look an it seems every time this happens, a different user or two ...
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657 views

ESXi 5.1 on Poweredge 510 freezes after base-esx update

Background / Problem Just experienced an issue where an ESXi host was upgraded from 5.0 --> 5.1 perfectly fine. Then, I did a scan and remediated a patch (ESXi510-201210401-BG) Looking into the host ...
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PowerShell create new Azure VM from uploaded disk (not image)

I have a VHD in Azure storage. That VHD is configured as an OS disk through a command like the following: Add-AzureDisk -DiskName $newCode -MediaLocation ...
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Installing Centos 6 using virt-install over SSH with no graphics - beginner

I have a Centos 6 box with virtualised CPUs that is ready for installing a virtual OSs. I am installing remotely over SSH and my Centos 6 box has no GUI (no GNOME etc) so it's purely command line. ...
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439 views

Getting CPU steal times on Ubuntu 11.4 Virtual Box

I'm trying to check on CPU steal times in a virtual machine. The goal is for me to be able to detect if my app is running in a VM on over-committed hardware. I'm currently just testing, in ...
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How can I restore VM on a new Hyper-V server?

I was working gladly with my VM on my local Hyper-V server. But, after installing some updates on the host the system only show the famous blue screen. I couldn't start my host so I reinstalled it and ...