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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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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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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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? ...
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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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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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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). ...
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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 ...
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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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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 ...
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virtual_alias_domains - how to use different IP addresses when forwarding mail?

I host 2 web domains (domain1.com and domain2.com) on a CentOS 6.6 Linux server with 4 IP addresses. Postfix 2.6.6 accepts mails to info@domain1.com and info@domain2.com and forwards them to ...
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Does LXC container performance depends of host load?

I am wondering if LXC could offer a full isolated benchmarking environment. Let's say we have 2 identical machines, with the same fresh Linux and without network connection. First machine has a load ...
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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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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 ...
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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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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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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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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 ...
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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 ...
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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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“kernel: Cannot read proc file system: 1 - Operation not permitted” — millions of such messages each minute in kern.log on OpenVZ VPS? [closed]

I'm seeing repeated never ending such messages in kern.log on my OpenVZ ubuntu 12.04 server. Mar 2 06:23:33 localhost kernel: Cannot read proc file system: 1 - Operation not permitted. Mar 2 ...
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Benefits to private networks between virtual machines on an ESXi host?

I'm planning this development environment with a few database servers, and originally thought I would have a few private networks. I then thought it might be unnecessary as the ESXi cluster already ...
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Should I Use the Default SQL Server 2012 Accounts or Make Specific Ones?

I'm installing the 180 day trial of SQL Server 2012 on a virtual machine with the intent of buying a license for it later on. From past experiences with installing SQL Server I would always make ...
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Move and clone VirtualBox machines with filesystem commands

I know of 2 ways to clone a VirtualBox machine on a linux host, one is by using the VirtualBox gui and exporting and re-importing as appliance (in the file menu of VirtualBox). The other is by ...
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What are EC2 Best Practices?

There's scant documentation on this topic. For example, the EBS initialization described in this page is an important first step for running a database on EC2: ...
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Backup of KVM guests when using qcow2 disk files

I got a Ubuntu (hardy) system used for virtualization using KVM. Each guest got it's own qcow2 file used as disk. Guests are running Ubuntu (hardy). What would a good backup strategy be for such a ...
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How to migrate VirtualBox 2 virtual computer to VmWare server2?

How to migrate VirtualBox 2 virtual computer (virtual drive) to VmWare Server 2? Computer itself runs Linux, virtual computers run Windows XP and Windows Vista. I need support for GRE protocol, which ...
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Virtualising a VERY legacy app

Looking for a bit of help on this one. I have a customer who has a VERY old MS DOS application that is written in some 3GL language of unknown origin. The original software vendor went out of business ...
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Apache2 + Disable Default Virtual Server

This is the first time I actually try to setup a server myself. Everything is working good so far. I have added a new virtual server and changed my domain´s A records and it is now working as ...
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optimum configuration for AD and exchange 2010

We are a small business (~100 emp) with a creaking server running AD, Exchange 2003 and more. We need to upgrade the hardware and it has been proposed to put Win Svr Std 2008 on one new server with AD ...
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266 views

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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Setting the noatime flag for filesystems inside an lxc container

My host filesystem is ext4 mounted with the noatime flag. But inside an lxc-container, the flag is absent. Here's the output of mount on the host: /dev/sdb1 on /home type ext4 (rw,noatime) And ...
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Command line is horribly slow in Ubuntu Server

I am running Ubuntu Server on VirtualBox. I am not using X Windows, only the command line. It looks like it is redrawing the screen for every line that causes the screen to shift down. In other ...
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Does kern.hz still have any relevance in FreeBSD if “dynamic tick mode” is enabled?

I'm running a FreeBSD 9.0 setup as a virtual machine in a KVM setup. In previous versions of FreeBSD it was common to force the kern.hz setting to a lower value so that the virtual machine does not ...
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Make a copy running VM-ware Virtual Machines

I want to backup my virtual machines while they are running, is it possible to do this without buying more VM-Ware products? They are running on CentOS 5.2.
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Any virtualisation software that works with… gasp… Windows 95 as the *host* O/S?

I know this sounds crazy, but is there any VMWARE/Virtualbox type software that was around back in the days of Windows 95? Reason I ask is that I just got a Nokia E71 (hooray) and have successfully ...
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Performance and Utilization monitoring of Xen Dom0

We run a mixed bag of Citrix XenServer and Gentoo/Xen virtualization platforms in our company. In general, we use XenServer where we have shared storage (SAN, iSCSI or whatever) and Gentoo/Xen where ...
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Optimization XFS on Linux guest in Hyper-V (VHDX)

In our company we're using Hyper-V (Windows Server 2012) hypervisor and VM to organize our in-company services in our data-center. I am supposed to set up Ubuntu 12.04 LTS guest for our main database ...
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VPN server on Windows Server 2008 for a small office

I'm going to refurbish the IT-infrastructure for a small organization with one single office, and I'm not sure what VPN server to use. In your opinion, would the built-in Windows Server 2008 VPN ...
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How should I set up my Hyper-V server and network topology?

This is my first time setting up either Hyper-V or Windows 2008, so please bear with me. I am setting up a pretty decent server running Windows Server 2008 R2 to be a remote (colocated) Hyper-V host. ...
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Virtual PC (XPMode) - Setting up Loopback Adapter for guest to talk to host

I have Windows XP running inside Windows 7 via Virtual PC (XPMode). Now I want the IE6 browser inside the virtual XP guest instance to be able to talk to the IIS webserver running in the host OS ...
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vmware server end of life, where to go now?

We have some virtual machines on vmware server 2.x running on 64 bit hardware and quite happy with it. As vmware server will no longer be offered we are thinking to migrate to ESXi, which seems is ...
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Which Linux distribution runs smoothly in Sun's VirtualBox?

Apparently some distributions do not run smoothly in VirtualBox. For example I installed Fedora 11 and I couldn't configure monitor's screen resolution to more than 800x600. What distribution run ...
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What recommendations would you give for implementing VMware Server, not ESX

I can't afford VMware infrastructure to do all the cool things, but I also don't have the money to buy a physical server for each and every machine I need, so I've been implementing some non-core ...
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Is Windows 7 RC stable enough for limited production deployment?

With the Windows 7 RC out today, and it being good for a year before expiring makes for a compelling argument to deploy it in limited production usage internally. I tested the Windows 7 Beta and was ...
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What role does virtualization play in a network with a SAN?

Can't you just ditch virtualization and boot directly off a volume in the SAN?
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Risk when deploying virtualized production servers without in-house virtualization expertise?

I've been asked to evaluate moving three production servers to a virtualization platform. The servers currently run Windows Server 2003 with a mix of applications that, given a catastrophic failure, ...
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Oracle DB on VMWare?

Management have OK'd a migration of our main Oracle DBs to a virtual machine platform. Operations say they'll dedicate heavy-duty hardware and only run the DB VMs on it. I've heard that running DBs ...
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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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vmware: how to virtualize nt server 4.0?

I'm trying to virtualize a nt server 4.0 sp1. When I run the vmware converter it says that is must be at least sp3. However I can't even find this on MSDN. Has anyone had a similar experience and ...
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Preferable VM software for a small dev team

I am not very familiar with the world of virtualization, but want to explore the opportunities. Most of our developers currently develop on their local machines; I want to see if this can be made a ...