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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How to handle virtual environments on a secure network

We do embedded software development. As such, we use a wide variety of tool sets for the many different targets that we work with, and we frequently move from one project to the next. Developers ...
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27 views

Boot to last VM status on XenServer reboot

I have a Citrix XenServer 6.2 on a non-prod enviroment, which means that could be affected by power outages from time to time. This server has a lot of VMs, some of them are power on and other not. ...
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66 views

IBM BladeCenter H networking

I'm new to the IBM BladeCenter H, and I'm trying to figure out the networking side of it. I've installed a windows server OS on one of the blades, and am trying to fiddle with it's network setup ...
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3answers
344 views

How to find out the virtualization type of an linux VPS?

Having access to an VPS, i need to know which type of virtualization it is running from the terminal. How can i know if it is OpenVZ, Xen, KVM, etc?
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1answer
58 views

Getting VMware Port-ID using commandline

Is there a way to directly gather the vmware port-id using commandline? I'm trying to make monitoring switchports easy through esxcli but in order to get port statistics I require the portid of a VM ...
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1answer
136 views

'conntrack' tracking private TCP sessions between VMs

We have a pair of VMs running as virtual routers and BGP/TCP peering between the two virtual routers (running over QEMU/KVM). The VMs each have a tap interface that is connected to a Linux bridge that ...
4
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3answers
83 views

Virtualisation suitable for packet-intensive application?

We have a custom and VERY bespoke application that runs on a Windows 2008R2 server. It's primary function is to connect to many tens of thousands of IP addresses as quickly as possible and interrogate ...
2
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1answer
50 views

KVM image size has changed

We had a 180GB VM image. Inside the guest VM everything is OK and hdd size is 180G. but when we look the image size on the host it is 475MB. I am afraid that if we restart, the VM wouldn't work. I ...
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1answer
117 views

Intel processor has 8 threads but only showing 4 in task manager

I have a server with an Intel Xeon E3-1240 3.3Ghz processor. According to intel's website this processor has 4 cores and 8 threads, however in Windows Task Manager there are only 4 showing. The ...
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1answer
1k views

Can I use XenServer GPU Pass-Through without XenDesktop?

XenServer documentation only covers using GPU Pass-Through ("vGPU") to run XenDesktop's "HDX 3D Pro Graphics." XenServer GPU Pass-Through cannot be used with the XenCenter VNC console and it does not ...
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1answer
398 views

Serving Applications from Linux server to Chromebooks/Browsers?

I'm looking for a way to serve desktop applications (RemoteApp style) to a Chromebook (or other web browser), but running on a Linux server. All of the systems I've come across thus far (XenApp, ...
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1answer
196 views

How does migrating a running Virtual-Machine from one Hypervisor to another actually work?

How does migrating a running Virtual-Machine from one Hypervisor to another in a cloud environment actually work? I know that it is possible and that this feature exists. But what does actually ...
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1answer
18 views

Network two vm's on one host machine whether on or off the network domain

I have a corporate network with the ip addressing range of 192.168.0.x I have a host machine (a mac) which when on the network gets it's ip's from dhcp. On the host machine i have 2 Virtualbox ...
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1answer
76 views

How does creating multiple virtual machines affect performance of a Dell Server? [closed]

Say, a dozen applications have to hosted on a single Dell Server using open source technologies like XenServer. Some of the applications are resource intensive while others are not. What should be ...
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1answer
273 views

vanilla ubuntu-vm-builder on i7 aborts aborts (with PAE?)

host: intel i7-4* cpu, running linux kubuntu 14.04 guest: attempting to create. ubuntu-vm-builder kvm saucy eventually, Get:1 http://archive.ubuntu.com/ubuntu/ saucy-updates/main ...
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2answers
127 views

When to employ server failover in a virtual environment

This question kind of got me thinking about fault tolerance in DHCP, so I did a little digging in my current environment and discovered that we only have 1 DHCP server per major site in our company ...
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1answer
488 views

Hotplug scripts not working xen [closed]

I am using CentOS 6.5 64 using this script to install xen on server yum install http://fedora.cu.be/epel/6/x86_64/epel-release-6-8.noarch.rpm yum install centos-release-xen yum install xen ...
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6answers
509 views

When is it time to add more cores to your virtual server? [closed]

I have a Linux (RHEL 5.8) server with Java 7 and Tomcat 7. The performance is poor, and I am pretty sure it's the DB queries that are slow. We have 2 cores right now, and load average never exceeds ...
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2answers
365 views

How do I give label to vSwitches on VMWare?

I've searched extensively trying to name the vSwitches that I create, but all I can name them are "vSwitchX" where x= some number. How do I give these switches names? I'm using the Web Client. ...
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1answer
267 views

Ping (DUP) with Linux bridges and tap devices

http://imgur.com/qPoy2QJ I have two Linux (Ubuntu 12.04) VM (running on KVM) that networked together using two Linux bridges as shown above. The network interfaces are Linux TAP devices. The problem ...
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1answer
82 views

Servers vs. Worker Processes [duplicate]

Just wanted to get some other opinions. I am currently having a discussion on how to go on a web environment. We want to virtualize our web layer for a very active site. However, there is a debate ...
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1answer
101 views

Increase disk space in a VM using LVM : Best practices?

When you have virtual machines, the size of disks can be changed, and specifically, increased. That makes the problem of resizing LVM a bit more complex than on a physical server. There are three ...
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1answer
251 views

Disk Space Difference On Hyper-V Server OS VS VM Guest OS

I have a Windows Sever 2012 Standard 64-bit running Hyper-V. The Hyper-V is hosting a guest OS of Windows 7 Professional 32-bit. I noticed that I was running out of disk space on my server. So I ...
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1answer
75 views

Linux Containers (LXC) : lx-execute and networking

I have a question about LXC Containers. I have some containers, if I lxc-start them, they come up with networking fine, but I want to just be able to run commands against them using lxc-execute, ...
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1answer
746 views

Run VMware inside nested VM hosted by Hyper-V [closed]

I have Hyper-V running on my system and I thought I would host a VM on my system to expose a second Windows 8.1 VM on top of the system with Hyper-V. My goal is to run VMware inside this virtual ...
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1answer
120 views

Two domains within the same IP Range

We are in the process of implementing MS Dynamics AX and a requirement by our consultants is to have a test environment. We can build this environment and let it use our live AD setup however I wish ...
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616 views

ESXi 5.1 SCSI and NMP Errors Filling vmkernel.log

On a group of ESXi 5.1 systems, I am seeing the following errors every 5 minutes or so: 2014-04-04T11:22:45.374Z cpu1:8193)NMP: nmp_ThrottleLogForDevice:2319: Cmd 0x1a (0x4124022be3c0, 0) to dev ...
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2answers
174 views

Are computations performed in a Docker container exactly repeatable?

I've read the question titled "How is Docker.io different from a normal virtual machine?", but I'm still not certain how "virtual" docker containers are. For example, in a scientific setting, ...
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1answer
199 views

Relationship between KVM Virtualization Host and Guest resource utilization

I have a KVM Virtualization host with 8 cores and 32GB of RAM. The machine is used to host VMs used in evaluating software, configurations, etc. Typically there are 2-4 VMs running simultaneously. The ...
0
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1answer
28 views

What software allows a templated VM to be configured on its first boot?

I've encountered VM templates distributed as an OVF with a feature so that when you boot the VM for the first time you are prompted for configuration options such as hostname, IP address, root ...
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2answers
41 views

How should I package a VM template to be cloned repeatedly, along with a single large storage volume for all instances to share?

I have a number of VMs that were based on the same template, each with about 2GB of storage. They all share read-only access to a 50GB volume (currently via NFS, but that is up for negotiation). I ...
0
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1answer
193 views

XenServer virtual network firewall

We are setting up XenServer machine with several VMs for our ecommerce business. We are intending to distribute services across several VMs (1 for web, 1 billing, 1 email, etc.) The XenServer machine ...
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0answers
65 views

Xenserver firewall consideration

We are setting up Xenserver for a production environment with seperate VMs for a website, billing, control panel, mail. My question is, should we rely on each server's IPtables or is it necessary to ...
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1answer
248 views

Move big file from VM to host hypervisor in vmware vsphere

I have a big file (220G) I would like to move from a virtual machine to its host. The file is actually another virtual machine's disk file. for other smaller files, I would have done that with a ...
1
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1answer
44 views

Under what circumstances could multiple VMs and mounted drives have corruption at the same time?

Today I had to fix 3 VMs with near identical file system errors all running Redhat 5 or 6. Basically the VMs had corrupted inodes and remounted / as a read-only file system, also corrupting several ...
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2answers
1k views

When emulating an OpenWRT Router in VirtualBox how do the network settings relate to a real world router?

I'd like to setup OpenWRT in VirtualBox for purposes of testing a network configuration before putting it on a live physical router. How do the adapter settings relate to the real physical ports on ...
0
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1answer
358 views

Configure GRUB on XEN VPS

I have a xen VPS with debian 7 x86_64 installed on it. The operating system comes with GRUB2 installed on it. The problem is that while runnnig apt-get update apt-get upgrade -y GRUB says The GRUB ...
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2answers
576 views

RHEV Manager best practises

I've been playing around with RHEV. I was wondering what is the best practise for the RHEV Manager in terms of installation. In a big production environment is it best for the Manager to be installed ...
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1answer
738 views

Which CPU model to set for guest KVM when processor is Ivy Bridge?

For a KVM host with an Ivy Bridge processor, which MODEL should use for CPU>CONFIGURATION in Virtual Machine Manager? Ivy Bridge is not available.
2
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4answers
539 views

new hyper V High Avaliability setup and SMB 3.0 storage

I am looking at building an new 2012 R2 with Hyper V setup, everything has to be HP hardware. 2x HyperV 2012 R2 servers running 20-30 VMs. These will be dual 6 core xeons with 128gb of ram. 2x 2012 ...
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0answers
26 views

Jumphost VM not able to communicate with LAN

I have setup a jumphost VM on WinXP. It has 2 NICs. NIC1, which is the LAN, has the following IP settings: IP: 10.0.0.1 /24 (No default/ DNS configured) NIC2, which has external connections, has ...
1
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1answer
140 views

5-7 second latency between Apache server and MySQL server when website calls on database server

I am currently running a virtualized environment for my web and db server. When I access the web server or the MySQL server individually, they are both fast. I also have websites running on the web ...
0
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1answer
168 views

CloudStack New Install / Infrastructure Questions

I’d like to set up a public cloud for web hosting (cloud shared hosting, cloud vps, cloud servers) for a new venture, using Apache CloudStack platform. ----- Question #1 ----- What is the proper way ...
0
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2answers
153 views

Firewall high availability

Context: My company is on the verge of a major network improvement, we will expand our network to remote offices via radio bridges. The firewall will be handling: 3 mission critical networks 3 non ...
0
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1answer
118 views

Intel VT enable but not found in xenserver

I have an IBM 206M with this CPU --> Intel Presler Pentium D 950 Socket LGA 775 P4D 3.4 Ghz 800Mhz FSB 4M Cache EM64T. It has Intel Virtualisation tecnology. But when i want to install xen server, the ...
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1answer
32 views

Unable to add a vCenter server to VMware Horizon

I've installed VMware Horizon on a virtual machine which is on my ESX. In order to configure it, I have to specify the vCenter server into the Horizon's configuration. But when I try to specify the ...
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0answers
42 views

How does Xen resize VMs without shutting them down?

I'm experimenting with Xen on a spare machine and I noticed that it can resize the RAM and CPU allocations of my VMs without shutting them down first. VirtualBox, VMware Fusion, etc. can't do the same ...
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2answers
77 views

Deploying a private DAAS?

I am an electronics student who is doing an internship at a Data center. (have small to no knowledge about virtualization, cloud, computer networks). My friend and I were given a chance to deploy and ...
0
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1answer
279 views

How to exclude VHDX disk from snapshots on Hyper-v

(I'm using the built-in Hyper-V that comes with Windows Server 2012 R2) I want to play with my snapshots while I have a separate disk that would not be affected by those snapshots, thus I can store ...
0
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1answer
169 views

Hyper-V How to define “auto revert” to a snapshot after each reboot

I'm using the built-in Hyper-V that comes with Windows Server 2012 R2 and I'm looking for the option that lets me to set "auto revert" (or "auto apply") to a specific snapshot after the machine is ...