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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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
2k views

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
877 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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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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5answers
872 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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1answer
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Linux high RAM usage for unknown reason

after searching around for this and only finding posts of people who do not interpret the "cached" figure correctly, I decided to ask this question. I have some servers at hand, which act strangely. ...
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1answer
461 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
368 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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376 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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2answers
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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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4answers
3k views

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
158 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
2k 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
479 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
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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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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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1answer
1k 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 ...
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8answers
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Virtual machine image compatibility between VMware Server and VMware Player

I'm trying to minimize the number of different product versions used on my PC's both at work and at home. So far I have a mixture of: VMware Server 1.0.7 VMware Server 2.0.2 VMware Player 2.5.3 ...
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1answer
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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
228 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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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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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 ...
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2answers
5k 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
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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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2answers
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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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8answers
21k 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 ...
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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
4k views

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
2k 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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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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0answers
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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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8answers
29k 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
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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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5answers
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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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4answers
3k views

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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7answers
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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 ...
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7answers
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How do I move my production servers into a devlopment VM?

I have about 3 servers that are probably almost 10 years old, all using code what one might consider worst-practices for programming's sake. I'm terrified of making changes to the thing (production ...
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9answers
297 views

Why is Virtual PC being bundled with Windows 7 significant? [closed]

As I see it: Microsoft has always provided backward compatibility for legacy applications; As far as the end user is concerned, things won't be behaving any different from what they normally expect. ...
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1answer
56k views

CentOS 7 Minimal Install doesn't comes with networks scripts? Which version to use then? [closed]

I'm installing CentOS 7 as virtual machine but I'm having some problems related to network. As image shows I select Minimal Install for later add trough YUM any packages I want as for example: PHP, ...
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3answers
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What is the difference between RHEV and oVirt?

When I read the wikipedia articles about RHEV and oVirt, I can't really figure out why Red Hat have both projects, as they seam to solve the same problem? http://en.wikipedia.org/wiki/RHEV ...
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4answers
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Virtualization for hardware resiliency?

Can anyone tell me if it is possible to pool several physical servers to run a resilient virtualization environment. Our servers are getting more and more critical to our clients and we want to do ...
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5answers
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What's the point of running a virtual instance?

I sometimes hear things like "we have 5 servers, with 20 virtual xen instances". Why would you do this? What advantages does this have? Is it so you get the redundancy of multiple servers from only ...
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4answers
632 views

Different ways to shut down a system

I was asked this question in an interview for QA position: Tell me all the possible ways you can shutdown your system. The system could be in a network. I know this question is little vague. ...
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7answers
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Virtualizing Solaris 10?

What is the best way to virtualize Solaris 10 (not OpenSolaris) under Linux or OpenSolaris? I have software that is only supported under Solaris so OpenSolaris is not an option. I'd like to have ...