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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Can KVM suspend or shutdown guests automatically on host shutdown?

We have a CentOS 5.5 KVM host, running guests with various versions of CentOS and possibly other OSes later. We'd like to be able to either (a) automatically send an ACPI shutdown to all guests or ...
6
votes
2answers
661 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
25k 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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6answers
2k views

Are Rackspace's Cloud Servers really cloud hosting?

I may be confused about what cloud hosting really is... I asked Rackspace how its Cloud Server (CS) 256MB/10GB compares to Slicehost's 256slice VPS, and they said it's exactly the same (only ...
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3answers
658 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
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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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6answers
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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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7answers
1k views

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
1k views

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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votes
9answers
290 views

Why is Virtual PC being bundled with Windows 7 significant?

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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2answers
3k views

Why does increasing logical processors in Hyper-V for virtual machine increase performance.

To my understanding, virtual machines (assuming relative weight is even) get an equal share of the processor. When the VM is given some processing time, it shouldn't matter if the VM is seeing a ...
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4answers
3k views

Ganeti vs Proxmox [closed]

I'm system administrator in small software house. I'm going to virtualise our servers. The main reason for doing this is providing highest possible uptime, but probably it will also increase resources ...
5
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4answers
275 views

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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votes
5answers
3k views

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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6answers
15k views

Windows 7 x64 - free virtual machine host applications running headless

Given a machine configured with : Windows 7 64 bit a CPU that DOESN'T support the Intel hardware virtualization Are there any free, non-time-sensitive virtual machine hosts that can host either 32 ...
5
votes
3answers
9k views

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
617 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
971 views

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 ...
5
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4answers
14k views

How to mount virtual machine's LVM partition on KVM host?

If I trying to do following on KVM host: # kpartx -av /dev/VolGroup00/kvm101_img add map kvm101_img1 : 0 208782 linear /dev/VolGroup00/kvm101_img 63 add map kvm101_img2 : 0 125612235 linear ...
5
votes
7answers
514 views

Any guidelines to think about when considering virtualizing an exchange server?

A friend of mine's shop is considering virtualizing several of their servers, including their Exchange servers (2007) and their BlackBerry-Exchange gateway systems. The systems support roughly 150 ...
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votes
2answers
1k views

Migrating virtual (VMWare) workstations from AMD to Intel hardware

We're a small dev team that runs instances VMWare Ubuntu hosted on AMD x64 machines. Our hardware will be upgraded to Intel i7, but we want to continue to use the virtual images we've built. But ...
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3answers
7k views

What KVM disk type to use?

I'm setting up a few KVM virtual guests and I'm debating which disk type to use. I haven't been able to find a good resource online that runs down the pros and cons of each. Can you help me create a ...
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1answer
596 views

Virtual vs. Named SQL Instances

What are the benefits to using virtual as opposed to running multiple instances of SQL on a box?
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votes
2answers
5k views

How do I change the size of a VHD?

I have a fixed size virtual hard drive that is running out of space. What's a good way to go about increasing the size? This VHD is created from Microsoft Virtual PC and/or Microsoft Virtual Server.
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5answers
217 views

What should be considered when purchasing a virtual machine set up?

I've been asked for an opinion about a purchase of a blade server that should be used for running virtual machines. I have very little experience in this, so what things should be considered in terms ...
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votes
2answers
923 views

Is it possible to have a 100% secure virtual private server?

I am curious if it is possible to have a VPS that has data on it that is not readable by the hosting provider, but is still usable on the VPS. Obviously there are some things that you could do to ...
5
votes
3answers
699 views

Recommendations: configuring a 10GbE NAS stack for virtualisation storage

I'll try as hard as I can to word this so it is not considered a shopping list. We have been successfully running a dev/test ESXi environment for some time, with a couple of Dell PE2950III servers ...
5
votes
5answers
482 views

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 ...
5
votes
3answers
194 views

What options do I have to clone a physical server as easily as a virtual machine?

We use virtual machines a great deal at my company, Hyper-V mainly but we have also dabbled with ESXi plus vCenter. Besides the traditional advantage of being able to consolidate many physical ...
5
votes
2answers
1k views

Difference between “Windows Virtual PC” and “Microsoft Virtual PC”

What is the difference between "Windows Virtual PC" (RTM released today) and "Microsoft Virtual PC"?
5
votes
3answers
398 views

Where to install ESXi so that all local drives are available to VSAN

I am currently setting up a new 3-host VSAN cluster that will be placed into production soon. (Note this is the newer "Virtual SAN" (VSAN) technology, not the older vSphere Storage Appliance (VSA) ...
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6answers
376 views

Can A Virtual Machine Be Converted to a Virtual Server e.g VMWare?

The Simple Question Can I convert an existing VM to a Virtual Server (e.g. VMWare)? I'm using Oracle's one and only awesome product, VirtualBox, and I'm trying to setup a SharePoint Farm to ...
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votes
3answers
1k views

SQL server in VMware

Please provide your tips and best practices for virtualizing SQL Server in VMWare ESX I am interested in advanced configurations and settings. Please provide reasoning behind your recommendations ...
5
votes
4answers
897 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 ...
5
votes
2answers
598 views

PostgreSQL database server virtualization, yay or nay?

Our former CTO (now "consultant") at some point warned his replacement about not virtualizing database servers, specifically our PgSQL database servers, but rather run them as actual, physical ...
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votes
3answers
1k views

Certain SQL queries performing very poorly in ESXI hosted environment

We recently set up a new machine with 8 dual-core CPUs, 20 GB RAM, and 3 1-TB drives set up in a RAID of some sort resulting in 2 1-TB drives we actually get to use (I'm not the hardware guy here). ...
5
votes
3answers
2k views

Windows Virtual PC and VirtualBox on the same PC

I am running Windows 7 Professional x64. Presently I am using Windows Virtual PC. I'd like to try VirtualBox. Can both virtualization platforms be installed and run on the same instance of Windows? ...
5
votes
3answers
2k views

CentOS6 installation from CentOS5 box?

I am trying to build a new CentOS 6 VM from my CentOS 5 host, but it appears that something fundamental has changed between these versions: $ rpm -ivh --nodeps --nodigest --ignorearch --ignoreos ...
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3answers
514 views

Quick and clean ways to clone virtual machines

I have 2 hypervisors running. One is an ESXi 4, the other one a Hyper-V 2008 R2. My question is: What is the cleanest and easiest way to clone a machine under each hypervisor without using any ...
5
votes
6answers
709 views

good primer for Hyper-V virtualization?

Can someone suggest some good online resources for getting up to speed on Hyper-V technology? I've worked with Virtual Server, and my understanding is that they're fairly different in some respects. ...
5
votes
2answers
3k views

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 ...
5
votes
1answer
1k views

Using Virtualization (vmware or virtualbox) to setup ipv6 network

So I'm working with a Windows 7 host and have both Virtualbox 4.0.10 and VMware Workstation 7.1.4 installed. I have been trying to create an IPv6 network that is host only to communicate between the ...
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votes
3answers
2k views

XenServer Performance

we've got 2 x HP DL360 G5s with Quad Quad Xeons 2.6GHz and 32GB of memory each running XenServer 5.5 and they access an OpenFiler box (with 8 x 320GB SAS 10K drives) via copper CAT5 (1GB) for the ...
5
votes
5answers
7k views

Debian Squeeze Hyper-V Drivers

I have a fresh Debian 6.0.0 (Squeeze) server running on Hyper-V and I'm trying to get the synthetic drivers loaded into the kernel (2.6.32-5-amd64). The research I've done says that the Linux ...
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votes
2answers
2k views

Is it possible to tell which cpus are hyperthreads of the same core?

I have a server that is a quad-core i-7 with hyperthreading enabled. The kernel recognises this as 8 cpus, as it should. I want to create a couple virtual hosts running on this machine. virt-manager ...
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4answers
2k views

Virtualization: 64-bit or 32-bit?

I'm going to install Ubuntu 10.04 Server in a virtual machine and want run MySQL and Lighttpd on it. Are there any benefits or disadvantages between 64-bit and 32-bit virtualization, except the 4 ...
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3answers
2k views

server virtualization: hypervisor (xen) or virtualbox?

Hey guys! I just set up a debian server for websites but now I need to install a windows server on the same machine because I need to run a game server (windows-only). Virtualbox is already installed ...
5
votes
3answers
6k views

Using LVM snapshots for KVM virtual machine clones

So, I've got a pretty awesome KVM setup running now, CentOS5.5 on the host and guest domains, libvirt managing all the configuration, etc. The guest domain filesystems are stored in LVM on top of a ...
5
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2answers
1k views

What is Ubuntu enterprise cloud?

If I install Ubuntu 10.04 Server, will it provide me with virtual machines which I can use to install different OSes? I need Debian Lenny on a VM for example. What facilities does it provide? Is it a ...