Virtualization is a group of software technologies that allow abstraction between layers of a system. This allows separation between the logical layers of the system, providing isolation, flexibility, and/or the ability to run more than one at a time. This differs from most traditional systems where ...

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Linux-KVM networking advice?

Being new to virtualization in general, and somewhat new to Linux (using Debian Squeeze and coming from BSD) I have a hard time understanding what would be the best network bridging option for my host ...
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4answers
450 views

Moving all internal servers to the cloud

Background One of my clients is an IT-dependent workflow-driven law firm with about 50 seats. They have been audited by one of their clients (an FSA regulated mortgage lender) and told that their ...
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1answer
977 views

Does enabling hardware x86 virtualization (AMD-V or Intel VT-x) slow down my computer if I'm not running virtual machines?

Does enabling hardware x86 virtualization (AMD-V or Intel VT-x) slow down my computer? Obviously, it improves the performance if I'm running virtual machines, but what if I'm not running any VMs?
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5answers
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Is it possible to cause artificial network packet loss or latency?

I'm trying to reproduce some issues on a deployed application where the MSSQL server and client are running in two separate machines. I think there may be network issues between the two machines, so ...
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2answers
1k views

Server CPU's: How much does L3 cache size matter when it comes to virtualization?

Performance-wise, how much does the L3 cache size on Intel Xeon i7 processors matter for virtualization functions? I'm picking out a Xeon 1366 Nehalem/Westmere CPU for a server I'm spec'ing to be a ...
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3answers
7k views

Virtual Sound Card for Windows Server?

i have some software running on a server which requires a sound card to be installed. i'm trying to find a virtual, or emulated, sound card driver for Windows 2000 Server. It doesn't have to play ...
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1answer
1k views

How to monitor / control file IO in Xen virtual machines

I have a pretty beefy Xen server (8 CPUs, 4G of RAM) running about 40 256M VPSs and I've been having issues with file IO speed. What I've found is one or two VPSs on the host can severely degrade ...
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3answers
14k views

Xen vs. VirtualBox under heavy load?

Which performs better under heavy CPU and memory usage on the virtual servers, Xen or VirtualBox?
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9answers
2k views

What software is available to simulate a LAN?

I've been using VMWare to simulate a simple LAN (a DC and several workstations hosted on a single machine). The LAN will be used as a test environment for software that is currently in development. ...
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5answers
504 views

Virtualizing Microsoft SQL Database server

My company is looking to virtualize our Microsoft SQL server. I read on another question that databases on VM's suffer from a IO bottleneck which is not very good for us. But I was wondering if ...
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3answers
3k views

Is the Amazon EC2 instance id unique forever?

We're using amazon EC2 and we want to keep track of instaces. Is the Amazon EC2 instance-id unique forever? i.e. If a VM has an instance id of i-12345678 is there a guarantee that when that instance ...
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2answers
768 views

Memory overcommitment on VMware ESXi 5.0

I would like to understand better the possibilities of VmWare ESXi memory overcommitment. I've read this paper from VmWare, so I am familiar with general concepts, such as hypervisor swapping, memory ...
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4answers
747 views

Is Hyper-V a real hypervisor

According to Wikipedia, there are Hyper-V and Hyper-V server. Ok... Hyper-V server doesn't need an OS to run, so it is true Hypervisor. But what about Hyper-V inside windows2008, is it a "type 2" ?
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automatically shutting down an ESXi host nightly

We just picked up a new development server that I've loaded ESXi on. The room it's in is well ventilated during the day but at night the door is closed and it gets quite toasty in there. I've been ...
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votes
3answers
713 views

Is paravirtualization evil?

I have an VMWare ESX Server v3.5 with a few virtualized Debian Lenny VMs (kernel 2.6.22 with vmi) running Apache Tomcat 5.5. I enabled paravirtualization, and Disk IO increased from about 240MB/s to ...
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5answers
747 views

LUNs and virtual machines

I have HP P2000 + XenServer solution working. What I'm thinking about is how to create LUNs for 20 virtual machines. Separate LUN for every VM ? It gives me ability to backup the specific virtual ...
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2answers
5k views

Are there any benchmarks for virtual machines with and without VT-x?

Where can I find benchmarks of virtual machines running common OSes like Ubuntu or WinXP, with and without VT-x? I am using xVM (VirtualBox), but also have the option of VMWare or Xen hypervisors. ...
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1answer
313 views

How to take snapshot of non virtual server and restore it in VM?

Is is possible to take a snapshot of a non virtual server (Ubuntu) and restore it in a virtual machine? I'm asking because I'd like to have an exact copy of my production server to use as a dev ...
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4answers
320 views

Is DAS OK for under-utilised virtual machines?

We're a little behind in the virtualization game, I'll have to admit. We currently have nothing virtualized, but I'm trying to change that. We want to get our feet wet with virtualization and get a ...
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2answers
9k views

What happens to children when deleting a snapshot in vmware?

I'm new to virtualization and want to make sure I understand what will happen when I delete a snapshot Say I have a tree like this Base SnapshotA SnapshotB SnapshotC Two questions: If I ...
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5answers
364 views

Fault tolerant server structure for the smallest of businesses

I'm trying to figure out what to do for a small business that has been plagued by ridiculous hardware problems. Right now, this business runs on five or six desktop machines; no server infrastructure ...
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3answers
4k views

Virtual memory in virtualized machines (Swap File in VM?)

What are the opinions on allowing virtual memory inside a virtual machine? For example, a host machine w/8 Gig of memory, I could run 4 VMs each w/2 Gig (roughly) and there would be no host ...
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2answers
1k views

Hardware requirements for a Virtual Server

I moved this question from StackOverflow because it makes more sense to have it here We have decided to go with a virtualization solution for a few of our development servers. I have an idea of what ...
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3answers
234 views

What does ZeroVM virtualize?

I'm having a bit of trouble wrapping my head aroung ZeroVM. Let's say I want to run Wordpress. One option is to lease a hosted virtual server running VMWare, Virtualbox, Xen, CoreOS, or something ...
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1answer
129 views

Installing vmware/xenserver on a linux operating system?

We're currently in the process of setting up a server here in a research environment. It would be ideal to use VMware ESXi, but (and I apologise if I get this completely wrong, I'm somewhat new to ...
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2answers
643 views

VMware: Make applications see Windows VM as bare metal

In a virtual environment using VMware, I want to setup a Windows license server. Unfortunately, the vendor's license server refuses to run on a VM; it must be installed on a physical machine. Since ...
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2answers
455 views

Do you remove unwanted packages (*NIX), or do you disable them?

Im currently building a cobbler and puppet setup. One thing I do is disabling unwanted services with puppet, but then I thought: Should I remove them with cobbler, rather than disabling them after ...
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2answers
2k views

Virtual host on LAN - VMs on DMZ, separate NICs - is this a bad idea?

Just kicking this idea around, and wanted to see if you'll be so kind as to point out the problems I don't see. If I set up this new HyperV host as a normal domain member, the benefits are obvious. ...
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3answers
4k views

Guest optimization tips for Ubuntu on VirtualBox [closed]

I was wondering if anyone could shed light into "Guest optimization tips for Ubuntu (guest)" I came across http://serverfault.com/questions/18290/virtual-machine-guest-optimization-tips, for Windows. ...
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2answers
22k views

Running Mac OS X on Hyper-V

I have my workstation setup with a Windows Server 2008 running Hyper-V. Now I really want to install OS X for testing purposes. Have anyone had any success running Mac OS X in an Hyper-V environment? ...
6
votes
1answer
855 views

Windows 8 virtualization gives BSOD 0x0000005D

I find that, when trying to run windows 8 on Xen cloud (and also when running it in ESXi), the installer bluescreens with 0x0000005D (UNSUPPORTED PROCESSOR) Initially I thought it was giving the VM ...
6
votes
1answer
191 views

Why doesn't VMWare DRS automatically migrate VMs when a host is put in maintenance mode?

We have 4 ESXi 5.0 hosts in a VMWare cluster on shared storage (NFS) with DRS and HA on. We want to perform a memory upgrade on one of the hosts. We put that host in maintenance mode but DRS did not ...
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3answers
209 views

Can I let my users create VM's as they wish?

In my dev team now, there has risen a request to be able to create/run VM's on demand. What they are asking for is a system/method/tool that they can select the following: CPU's, RAM, OS , Hard disk ...
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3answers
1k views

Which VM Product is right for me? (GPU Virtualization?)

I'm looking for a VM Product that has the following features: - Being able to access the underlying hardware (GPU especially?) - I have Virtualization Support on my CPU, so that's not a problem. ...
6
votes
3answers
3k views

Can I access Cassini from a remote machine?

So I'm having that browser compatibility party we all have at some point in a web project and want to access my localhost Cassini instance created by VS2008 rather than having to upload to our ...
6
votes
1answer
2k views

Can Hyper-V run in a virtual machine?

Ok, we all know (or should know) that Microsoft's answer is a plain "NO!". But we also know that recent hypervisors can support nested/recursive virtualization, provided the underlying CPU offers ...
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votes
4answers
886 views

Alternatives to Xen for virtualization setup

I currently use Xen in production to run a number of Ubuntu VMs (Intrepid/Jaunty). I've got another server which I'd like to set up as a VM host to run more guest OSes, and am looking for the best ...
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votes
2answers
2k views

VirtualBox guest network lost after host disconnects

I am running VirtualBox both on a Snow Leopard OSX host machine and on a Windows Vista host machine. Whenever my host machines lose internet connection the guest machines seem to lose internet ...
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7answers
6k views

Running Xen inside VMware?

There are a number of Xen based virtualization products on the market, and like with other new software, there is a need to try them out in a lab environment before doing production installation on ...
6
votes
1answer
195 views

virtual disk image - file or partition

I'm looking at the differences between using a file versus a partition to store a virtual disk image in VM use. The common knowledge is that partition-based images are faster than file-based images ...
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8answers
15k views

How would you build a cheap Virtual Server farm for home development? [closed]

I would like a virtual server farm at home, ideally 6 virtual servers, all for my own personal development. What is the cheapest way for me to achieve this? I'd ideally like to use VMWare as I use it ...
6
votes
2answers
4k views

How to run an OVA + OVF appliance inside of AWS EC2?

GitHub Enterprise ships as an Open Virtualisation Appliance and File; it's intended to be dropped into existing virtualization setup like VMWare, VirtualBox, etc. I'd like to run it inside of the AWS ...
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votes
2answers
2k views

Tuning Open-iSCSI initiator settings for VM LUNs

I have a bunch of VM servers running Xen VMs from iSCSI LUNs mounted in the Dom0 host via Open-iSCSI. It's just a simple single-path setup (redundancy is on the target side via clustered storage and a ...
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votes
2answers
1k views

Support for virtual IPMI in a VM?

This might be a silly question, but... Is there any hypervisor or other virtualization solution which supports a "virtual IPMI" for virtual machines? I.e. would allow access to something that looks ...
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2answers
1k views

How to get Linux udev to play nice with Hyper-V IC synthetic network driver

I managed to get the Debian 6.0.1 to work with the Microsoft Hyper-V synthetic drivers, thanks to this question. However, if I don't remove the entry for the synthetic ethernet card from ...
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2answers
635 views

What are best practices on virtual lab/test bed architecture?

I am currently preparing a new small virtual environment for development and testing with Windows Server + SQL Server + AD + Sharepoint + Exchange + IIS(ASP.NET) + Biztalk + ?, for a small (up to 5) ...
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5answers
6k views

Moving Vmware Workstation VM to another host causes reactivation

I need to find a solution for developers using virtual environments with VMWare Workstation 7. We develop in different and incompatible environments. Presently almost a week is lost when modifying a ...
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8answers
24k views

VMware is so slow that is useless, this is normal?

On my desktop computer I have VirtualBox, and i can run a lot of concurrent VMs, up to near native speed. On my server, that is twice as powerful than my desktop computer, I have debian+VMware server ...
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3answers
490 views

Why use a type 2 hypervisor?

I have a question about type 1 and type 2 hypervisors. Type 1 runs on the bare metal, and then the end operating systems are installed on top. This seems to me like the most logical way to build a ...
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5answers
2k views

Is it realistic to run Windows Server 2008 with 1GB of RAM?

I am just about to "invest" in a cheap Windows 2008 VPS ($30 per month!) which comes with 1GB. Before I do that I thought I would ask if its realistic to expect a usable server with only 1GB of RAM? ...