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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28 views

Docker: how to partion my harddrive

I want to create partitions for my docker server. It will only host stateful application, data are stored in /srv/company/appname. I have two hard drive : 20GB 2TB. What is the best way to ...
0
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0answers
69 views

Hyper-V Windows Server 2012 R2 “Cannot create virtual switch” General Access Denied Error 0x8007005

After an ip change on the network adapter connected to a previous hyper-v switch we ran into some issues so I uninstalled the existing virtual switch and attempted to add a new external. I get the ...
13
votes
3answers
721 views

Allocating Non-Standard Memory Quantities to Virtual Machines [duplicate]

When setting up virtual machines on the various host systems I've used, be they Hyper-V, VMware or KVM, I have always allocated RAM in amounts that match physical memory configurations - e.g. to add ...
0
votes
1answer
56 views

Passing SAN Storage to Virtual Machine in active/passive HA Cluster

I need to attach a fibre channel SAN disk to one virtual machine that resides on an active/passive cluster (pacemaker, corosync). As it is the backup storage, corruption has to be strongly avoided. ...
1
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0answers
119 views

Export OVF fails with “File not found” error

Good morning/afternoon/evening all: I am having an issue with a single Virtual machine when it comes to exporting an OVA/OVF. I recieve a "File not found" error that appears to be pointing in the ...
1
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1answer
43 views

Performance impact enabling intel vt-x

I have a rather unusual question: What is the performance impact when you enable vt-x and you don't need it? I ask this because all of the new servers I receive have this enabled by default in the ...
0
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1answer
28 views

DATA NOT STORED IN GUEST OS?

Dell PowerEdge T110 II Tower Server | Windows Server 2012 R2 | Hyper-v VM manager | Windows 7 Pro (Guest OS) The Hyper-V guest OS (win7 pro) serves as the database server (MySQL) for storing ...
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0answers
15 views

Errors after unmounting qcow2 image with LVM

I successfully mounted a qcow2 image on my machine (the guest image uses LVM) using: qemu-nbd -c /dev/nbd0 /path/to/qcow2/file mount -o rw /dev/nbd0p1 /mnt/<mountpoint> vgchange -ay VolGroup ...
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votes
1answer
30 views

Shared nothing database systems with SAN

Cloud data warehousing being so popular recently, I am wondering if there is an inherent contradiction in the manner in which they are architected: Terradata, Greenplum etc. require 'Shared Nothing' ...
0
votes
1answer
110 views

pfsense as a virtual host

There seems to be a fair bit of information about running pfsense as a virtual machine on another hypervisor of some sort, but I am wondering if I can do the reverse and use a pfsense install as the ...
0
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0answers
18 views

What are the Resilient Overlay Network (RON) downsides?

What are the RON downsides? How this type of network handle with security questions? There are vulnerabilities? The RON's performance is good? Thanks in advance!
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0answers
29 views

How to use virtual interface as default interface

I've got a cloud SSD VPS @ OVH, and I'd like to change the default interface used for requests. I have two interfaces: eth0 (which is the default interface) and eth0:0 (which is the new virtual ...
0
votes
1answer
20 views

Difference between GPVM and LVM when referencing virtual servers?

I've been advised that there are two types of VMs available for enterprise use, but unfortunately have not been able to identify any resources that can explain what these are. The pricing between the ...
2
votes
0answers
25 views

Allowing outbound internet access with NSX while maintaining micro segmentation

I am getting into the world of VMware's NSX product for the purpose of micro segmenting VM's in the datacenter. That is to say, living in the same network space but not being able to talk to one ...
0
votes
0answers
88 views

Where are network namespaces in lxc / lxd?

I am trying to understand namespaces in the context of lxd / lxc. I have two containers which respective eth0 is bridged to br1 and br2 on the host. This is done via a Virtual Ethernet interfaces ...
0
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0answers
6 views

Azure Cost Estimator Tool hung clicking “View Report” after running for 6 days - can I still extract the report?

I'm running the Microsoft Azure Cost Estimator Tool for a length of 6 days with 2HR intervals. This ran successfully and there were no signs of system instability, nothing else has crashed. Hoenter ...
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votes
0answers
24 views

internet connection sharing Hyper-v virtual machine switch

I am running hyper-v. I created a virtual external switch and configured it to be shared with the host and the VMs. However the VMs obtain dhcp information just like the host does: same gateway, same ...
1
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0answers
28 views

iperf actual send rate always lower than the expected target bandwidth until some equilibrium reached. Why?

I did an UDP iperf 2.0.5-Ubuntu test between two VMs on the same hypervisor. As can be seen in the iperf output below I started my first test with "-b 686M" flag. However, iperf reported that it was ...
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1answer
54 views

Error while Expanding Disk Space of virtual machine in Hyper-V server

I have one Virtual machine running on my hyper-v server which has allotted the disk space of 100GB, i have only created C drive in this machine and C drive of this machine is fully consumed due to ...
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0answers
23 views

Without tcpdump running, Linux bridge works selectively

Architecture: Ubuntu 14.04 as a libvirt/KVM host with one VM. There is bridge bri17 on the host, with two interfaces: eth2.17 (uplink to the Internet) and vnet0 (to the VM). Symptoms: all tests ...
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0answers
15 views

Are changes since snapshots still stored as changelogs?

It's been four years. Is the accepted answer of this question about VMWare still accurate? In other words (in case for some reason that link ever breaks), is this still true? When you create a ...
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votes
1answer
56 views

Windows 7 - VM resource usage [closed]

I would like to ask a question about Virtualization and the performance impacts As the title suggests I wish to VM Windows 7 for a work laptop and run linux on the backend to leverage some of its ...
0
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0answers
106 views

What's the FreeBSD equivalent for the Linux pointopoint

What's the BSD (FreeBSD) equivalent of pointopoint used in /etc/network/interfaces on Linux (Debian)? I'm following this (Network configuration host system KVM/Routed) guide for how to use Hetzner's ...
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vote
1answer
25 views

lxc 1.1.2 on Debian Squeeze

I am running lxc 0.8.0 inside Debian Squeeze (Linux kernel 3.4.34). Does anyone run lxc 1.1 or newer inside Linux kernel 3.4? As I know, docker require Linux kernel version at least 3.16. What is the ...
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votes
2answers
73 views

ESXi host memory usage seems high with no VMs running

I have set up an ESXi 6.0 Update 1 installation on a HP ProLiant Microserver Gen8. This is using the HP-provided image for ProLiant servers. With no VMs running the host memory usage is 1714 MB, ...
2
votes
2answers
72 views

Ping only works twice

I have created a vm inside a xen host. By following this guide, I have managed to ping www.google.com, but it only ping-pongs twice before getting Destination Host Unreachable. If I restart the vm, I ...
0
votes
1answer
37 views

Virtual disk expansion

I'm running a virtual image (which happens to be our server for a number of programs) on a machine running ESXi 5.5.0. Although the host computer has a SSD of about 200GB, the virtual image was ...
0
votes
1answer
17 views

Virtual Sound Card Not Working on Windows Server 2008 R2 SP1 x64 virtual machine

I have Virtual Audio Cable successfully installed on my Windows Server 2008 R2 SP1 x64 virtual machine. It seem like driver works (new audio device in Device Manager group and VAC control panel works ...
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votes
2answers
58 views

Is it possible to use a ftps server (NAS) to use as a virtual hard drive in VMware vSphere Hypervisor, if so, how? [closed]

The title explains most of it. Basically, let's say I have a NAS(I don't). I want to allow another computer to use it as storage for a virtual machine on VMware vSphere Hypervisor. The software on the ...
-1
votes
1answer
309 views

Nested virtualization - is it possible? [closed]

I need to use Win10 with a server created with VMware ESXi 5.0. I'm going to install Debian 6.0 on VMware ESXi 5.0 and then install VirtualBox 5.0.14 with Win10 guest operating system. Will it work?
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votes
2answers
59 views

Connecting two ESXi servers via LAN

i have an issue with configuring two ESXi servers to communicate with each other. My configuration looks like this: 2 ESXi servers with 4-4 Ethernet ports. ETH01 on each server is used for internet (...
0
votes
1answer
201 views

Benefits of virtualization if only one server on hardware

A big HANA server will sit alone on dedicated hardware, nearly hundred processors, 2 TB of ram. The customer insists on having VMware between the iron and the DB. Most of the advantages of ...
0
votes
1answer
25 views

enabling virtual hosts in apache 2.4 or later

I'm using apache http server 2.4 on debian 8. I seem to recall from a few years ago that if you wanted to have virtual hosts, you have to enable this by adding a line to your main apache config file. ...
1
vote
2answers
36 views

How do I redirect with Apache reverse proxy on server errors

I have several http and game servers on a network and currently use an Apache2 reverse proxy to divvy out traffic between domains and machines. I am getting a significant amount more traffic to one ...
5
votes
0answers
39 views

How would I know if I should I be disabling virtual NUMA on VMs running older applications?

From VMware's docs: Virtual NUMA topology is available to hardware version 8 virtual machines and is enabled by default when the number of virtual CPUs is greater than eight. You can also ...
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votes
1answer
51 views

Please explain the statement, “Containers are lightweight…you can run thousands on a server…” [closed]

In much of the hype around containers I often hear statements such as: Linux containers are very lightweight...you can potentially run thousands of them on a single server... I understand that ...
1
vote
0answers
87 views

Libvirt & USB Hub Passthrough

I have a virtual machine which I wish to have a USB Hub and all of its devices allocated to a virtual machine. The Hub in question is a USB hub which itself is plugged into one of the ports on the ...
1
vote
2answers
103 views

Sending SMS from legacy system without the option for physical sms/gsm modems

My problem is that there is a legacy system for building automation (ventilation, temperature, lighting etc) without the possibility for upgrades, that needs to send text messages through a connected ...
0
votes
0answers
29 views

Xen+Libvirt: How to use PVH mode with Libvirt?

PVH mode is an hybrid of PVHVM and PV modes, where you use both virtualization and paravirtualization techniques for improved guest performance. It's been introduced around Xen 4.4. I'm using Xen 4.6 ...
3
votes
2answers
597 views

Why do we use a OS Base Image with Docker if containers have no Guest OS?

I've just started to study Docker and there's something that's being quite confusing for me. As I've read on Docker's website a container is different from a virtual machine. As I understood a ...
0
votes
0answers
33 views

Migrate Virtual Machine from KVM to Xen

I'm trying to migrate a Virtual Machine from Qemu KVM to Xen Hypervisor 4.1, but have problems with it. What is the best and simplest way to do it? What I've done so far: I have installed xen-linux-...
0
votes
0answers
17 views

Virtual Switch Stack connections to Edge Network

I have a pair of Cisco SG500 switches stacked together as a part of my collapsed core design. I would like to connect this stack to the edge network which is comprised of two Dell Firewall/SonicWall ...
0
votes
0answers
20 views

Do I need acpid daemon in virtualization guest?

I get VPS with KVM virtualisation (server for hosting services). I remove most of desktop services (like dbus, consolekit, xorg) because of security and stability concern. Guest run on virtualised ...
1
vote
0answers
136 views

Java application is slow in virtual server (KVM)

I have a Java web application, which runs from JAR, starts embedded Tomcat and is using Spring Boot. Problem is that it runs very slow when running in KVM virtual guest. The same application in the ...
1
vote
0answers
44 views

How does Qemu handle memory?

I'm having a real hard time understanding something and I was wondering if anybody has any experience with this and is able to help. I have two KVM VMHosts, one running qemu 2.4.1 and the other ...
0
votes
0answers
15 views

Is host process listening on virtual interface added to virtual switch possible?

I have a working setup of three virtual machines (on VirtualBox) bridged to tap devices added as ports to Open vSwitch. They are able to communicate. Now, I would like to make a host process (one ...
1
vote
3answers
137 views

How can I determine the performance penalty of VT-d vs. baremetal?

I am looking to configure my server in a slight odd way to create a private cloud setup. I have to take the HBA that my storage disks are tied to and pass it into a VM (probably xen) to allow the ...
1
vote
1answer
76 views

Manage Windows Server 2012 and trunk the Hyper-V VM (same physical NIC)

I'm trying to use Hyper-V to deploy a pfSENSE box inside of it. But, the scenario is: 3 VLANs VID: 1000 VID: 2000 VID: 3000 On a physical switch port, I've tagged the Server physical port with ...
5
votes
2answers
232 views

Hyper-V Virtual Switches and DHCP

What is the best way to force VLAN segregation accross multiple Virtual switches? I have probably a rather complex setup going in the effort to get essentially 4 separate virtual switches. The ...
0
votes
1answer
116 views

Correct virtio setup on Ubuntu 14.04 64-bit host

At the present moment, my guest is running inside qemu and host is kvm intel, running Ubuntu 14.04, kernel is 4.3.0 stable. From within the guest, when I run "hdparm -i /dev/sdb" on the guest, I get:...