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Questions tagged [virtual-machines]

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.

Modern virtual machines are implemented with either software emulation or hardware virtualization. In most cases, both are implemented together. Usually the term refers to system virtual machines which provide a complete system platform which supports the execution of a complete operating system (OS). Note that process virtual machine exist too, which are designed to run a single program (a single process).

An essential characteristic of a virtual machine is that the software running inside is limited to the resources and abstractions provided by the virtual machine—it cannot break out of its virtual environment.

2836 questions
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Defrag in Windows VM?

I've read conflicting advice on this issue so thought I'd ask here. Should I be running a scheduled defrag within my VM?
SteB
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Does a VM eat up RAM even when the VM is not active?

I'm running a virtual machine on my windows OS at work, and i have dedicated 1.5 gigs of ram to it, but i'm wondering: is that ram lost to my windows OS even when i'm not running the virtual machine?
Robert
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How do I boot a virtual machine image from my network?

I have many machines which require the same configurations. My goal is to boot them all from the network and load a virtual machine. It would be wonderful to have one image for all of our customer service machines. That way, I could load the virtual…
Haabda
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Cheap server platform with support for >12 GB RAM

I'm looking for the currently best (as in value for the money) cpu/chip/motherboard combo to build affordable application servers that support a lot of RAM (at least 12 GB; better more). As I want to build the servers myself, I'm not looking for any…
Dennis G.
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Automating virtual machine creation across multiple hypervisor platforms

Is anyone aware of a tool for automating the creation and deployment of virtual machines across different hypervisor platforms? I work on web applications running on EC2, Xen, KVM, and VMWare, and I'm currently writing separate deployment scripts…
Cerin
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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? I'm running on rackspace cloud, so the servers…
zemaj
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Would we be able to find out what VMs the parent server is using?

I am asking a rather ridiculous question here. Is there any way we can find out from the guest OS the parent OS and the VMs it is using? If it is possible, what command do we invoke from the guest OS? Thanks for your help
Joshua Partogi
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What exactly is a TX collision in a context of a VM?

I'm inspecting a problem with a MongoDB replica set reelecting a primary multiple times per minute. It seems that there is something wrong with the network configuration, but I can't nail it down yet. When running ifconfig on the virtual machine of…
Arseni Mourzenko
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VM restart on Southeast Asia Region

Today, few of my VM on azure (centos) restart . I hosted it in Southeast Asia (Singapore). This problem impact to some of service. 1.Is there any issue about it ? 2.Is there any alert if there is problem with azure cloud ? (not VM monitor, but…
M.S.Fajari
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How to shrink the size of a virtual machine hard disk

I have a Virtual machine hard disk over 20GB in size. But there are only about 8-10GB of files inside. I need to shrink this vhd file to a more manageable (actual) file size. I've tried using the virtual PC wizard and it doesn't do anything with the…
unknown (google)
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How to open virtual (.vhd) from win 7 enterprise?

I was given a virtual (.vhd) made using Hyper-V (it's a windows server 2008). I am running windows 7 enterprise on my box. Which client should I download for best performance. http://www.microsoft.com/windows/virtual-pc
Moni
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How to direct connect two virtual machine's NICs on vmware player?

I have two virtual machine on vmware player both, each have a NIC card. I want to direct connect VM1's NIC to VM2's NIC, not bridge, not NAT, not Host-only, just direct connect like connect through wire. Is is possible? How can I do this? Thanks!
superK
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Virtual machine hosting with priority

The simplified problem: I have 3 servers on which I want to host virtual machines. Some VMs are more important than others. Should I keep the important ones on a "high priority" server and the others on the other two servers? Or should I make…
user166298
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Is there any virtual machine software that would let me create a virtual machine on my local pc before uploading it to azure?

The time has come for me to configure a new windows server machine. This time though, It would be great if I could run it in a virtual machine and eventually upload the vm to some host somewhere, say, windows azure but other suggestions are…
IsaacB
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how to find if a host is a physical server or a virtual server

I am actually trying to find if a given host is a physical server or a virtual machine. I searched on Google but couldn't find any commands or tools. Can anyone here let me know is there is any utility which can tell me if its a physical server or a…
redoc
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