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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What is the perfect setup for a small Linux virtual server?

I have my own email server, and it serves a couple of dozen users. I need to replace it right now, and I want the replacement to be a virtual server image running under a hypervisor. My plans for ...
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How to extend a Linux PV partition online after virtual disk growth

VMware allows to extend the size of a virtual disk online - when the VM is running. The next expected steps for Linux system are: extend the partition: delete and create a larger one with fdisk ...
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ESXi VM NTP Server

We need to setup an internal NTP server. Because this server will pretty much ONLY be a time server I was thinking of just creating a VM for it. However, Googling around it appears that there there ...
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Does running one Virtual Machine on a HYPER-V box make sense?

I am considering running HyperV for all my servers, because backup and disaster recovery plans are easier, when I can move the images around to any hardware and not have to worry about drivers. ...
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2answers
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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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FreeBSD Hypervisor?

is there any possibility to have FreeBSD running virtual guests (Linux and Windows) apart from VirtualBox? Didn't find any recent information yet.
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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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3answers
879 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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What happens when a mail server goes down

I will deploy a web server, but I don't have much experience. I would like to know what happens with mail that is send when the server is offline (restarting, maintenance, etc.). When an internal ...
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Convert directory to QEMU/KVM virtual disk image

I have a directory filled with data at /var/backups/disk1 that I want to convert into a virtual disk image which I'll then be able to boot using QEMU or KVM (the directory contains the file system for ...
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Can I safely increase the number of processors on a VM?

I have several Windows 7, CentOS, and Ubuntu virtual machines running within a VMWare ESXi server. To get better performance while building on them via Jenkins, I would like to increase their number ...
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VMWare ESXi: how to add network drivers to installation?

Background / Problem I have two new servers (Dell R720 & Dell R520) that I plan to install ESXi onto. During the VMWare Hypervisor installation, I'm told that no network adapters exist. Upon ...
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Can I send clients a pre-configured Virtual Machine?

I am not very well acquainted with VM Ware and Virtualization but I am investigating the feasibility of creating a VM Instance using VMWare, Windows Server 2008 R2, and shipping that VM as a complete ...
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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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1answer
519 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
373 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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3answers
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vSphere machine wont start: Insufficient disk space on datastore

I am trying to add a virtual disk using a VMFS datastore with 1.98 TB of capacity and 85 GB used. I then power on the virtual machine, and it gives me the Insufficient disk space on datastore error. ...
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5answers
377 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
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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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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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What are the performance implications of running VMs on a ZFS host?

I'm considering migrating from ext3 to ZFS for data storage on my Debian Linux host, using ZFS on Linux. One killer feature of ZFS that I really want is its data integrity guarantees. The ability to ...
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1answer
159 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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1answer
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How do I delete a VM from 'virsh list -all'?

I created a VM using vmbuilder but I realize that I had set some of the flags incorrectly. Now when I do a virsh list -all it still appears, laughing at my novicity. How do I delete this? (I've ...
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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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481 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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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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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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1answer
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When cloning a VMware Virtual Machine, how can I prevent MAC address conflicts?

I've run into the following problem on both VMware Fusion (for Macs) and with VMware ESXi/vSphere. Many of you are familiar with the problem, and it is described at VMware KB: "Networking does not ...
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1answer
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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 ...
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3answers
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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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Which is better, Split or Monolithic VMware disk in a production enviroment?

Ok, so I have read a bunch of material on-line and curious as to your thoughts on split vs monolithic disk in a production environment. We are going to be building the VM server on a server that has ...
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3answers
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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. ...
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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 ...
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2answers
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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
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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 ...
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3answers
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Converting VMware VMs to Hyper-V

Our company is looking to try out Hyper-V as a server virtualization solution so I am looking for the most efficient way to test everything out safely. My plan is to make a snapshot backup of each of ...
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1answer
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What is the recommended method to prepare Red Hat/CentOS 7 templates?

If I need to deploy Red Hat 7 from template, I would like to take the recommended steps to make my "golden image" clean. It should boot to the first boot prompt and guide the user through the typical ...
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Bridging VirtualBox over OpenVPN TAP adapter on Windows

I'm trying to configure a virtual machine (VirtualBox guest running Backtrack 4) with a bridged adapter over a VPN connection. The VPN is is hosted by the cybersecurity club at my university, and ...
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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 ...
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1answer
8k views

How to route traffic from a VirtualBox VM only over a VPN?

I've got a VirtualBox VM (both host & guest Ubuntu Maverick). My VPN provider uses OpenVPN to setup TUNs. I'd like to set things up so that traffic from the VM only goes over the VPN and is just ...
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1answer
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How to create a Hyper-V Internal network

I have a Windows 2008 server running multiple Hyper-V guests. I want to create a Hyper-V "Internal" network. So far, I cannot get anything to communicate. I created the Internal network adapter in ...
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2answers
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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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2answers
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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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5answers
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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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Why do I need to assign static ip address to the bridge and not to the physical interface? [duplicate]

I have bond0 with two physical interfaces in it. Normally I used to assign static IP address to this bond0 to set up internet connectivity on the server. Now, because of LXC virtual guests, I had to ...
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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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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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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? ...
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vCPU performance between 1 or 2 vCPU's

Within virtualisation (Predominantly VMware) is there a performance advantage using either 1 CPU with 4 cores or 2 CPU's with 2 cores? Let's assume the application running on a VM can use two CPU's.
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Best virtualization server core [closed]

What is the best Virtualization server core and Why. Most people will say VMWare, but they are also Hyper-V and Xen server. Whos the best at the lower cost ? It's for production environnement, so ...