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0

I ran into a similar issue when installing core systems from powershell. Delete the vm but not the vhd file. re-create the vm and attach it to the vhd or vhdx file and you should be good to go. that's what worked for me.


0

Solved. It had nothing to do with my (correct) configuration but with a proxy I use to connect to non-standard ports. Turns out if you are already on the system (via the proxy) you need to open connection directly to the virtual ip because prerouting rules don't apply and your request won't get forwarded automatically.


1

Many virtualization host operations on the guest can result in a pause - resume. This will negatively effect the system clock at the guest. For example, cloning a VM results in a pause while cloning. The guest clock afterwards is behind. To get NTP to sync the clock you need to then restart the guest--not a good solution in all cases for sure. Alternative ...


1

No such thing as a "baremetal" hypervisor, unless it actually runs on-chip. Xen, ESXi, Hyper-V - all are a double kernel stack, where the hypervisor OS boots, and then brings up a secondary management OS. While the VMs are running on the hypervisor, it doesn't mean the hypervisor level is not an OS, as stripped down as it may be. As for KVM, it simplifies ...


2

For Linux I have had great experiences using Vmware ESXI 5.x. It has great documentation and many companies are using it. If you want to use Windows it would probably be more wise to use Hyper-V in terms of licenses. With a server 2012 standard license you can use 2 vm's for free and with the Datacenter Edition you can have unlimited virtual instances ...


1

Perhaps you can use device passthrough on ESXi to pass a video card and USB (keyboard/mouse) to a guest VM that you then use to manage the other hosts at that same box. You would have an additional keyboard/mouse and monitor (unless you have the option of having dual inputs on your display).


4

While it might not look like one, Hyper-V actually is a type-1 hypervisor, because the virtualization layer is placed below the Windows operating system and mediates all hardware access (some time ago, before hardware-assisted virtualization improved a lot, it was very common to experience really slow graphic performance on Hyper-V hosts, due to the O.S. ...


1

none really is a poorly-documented alias for noop. See here for more details.


0

No, what you are asking is simply not possible. Think about that: to give you a graphical user interface, your hypothetical hypervisor need a video driver and a window system. This automatically means that it is a full-flegged OS, rather than a thin hypervisor layer. So, no type1 hypervisor can do that. Heck, true type1 hypervisors really are ...


4

On a Windows host, qemu isn't actually a hypervisor, but is doing full machine emulation with dynamic translation, which is horrendously slow, and there's little that can be done to speed it up. It's maybe useful as a demonstration or for debugging purposes, but for anything serious you will want to use an actual Windows hypervisor such as Hyper-V, or some ...


0

Check this out: Virtualbox: Multi-attach disk http://virtbjorn.blogspot.co.uk/2012/12/virtualbox-multi-attach-disk.html What happens when you assign a master disk to a VM, is that the VM creates a differencing disk, where all writes go. The master disk will be used for reading, for whatever is not overwritten on the differencing disk. Over time, the ...


1

From what I understand, vGPU requires support at various layers. Hardware - only specific GPU's support vGPU functionality. Hypervisor - Citrix and VMWare are the only ones that I am aware of that support vGPU functionality. I'm not aware of anything in the full/free/open source Xenserver that provides this. VDI - The method you use to connect to the ...


0

According to the ovftool documentation , there is no such command. Ova is a big "archive" and can be opened with 7zip and extracted. But if you modify the extracted files (ovf) , you'll need to calculate the checksums to be able to deploy. I don't know if "repacking" the ova with 7zip is valid


0

If you have multiple hard disks a better solution is to use <boot order='1'/> for the first device you want to boot and <boot order='2'/> for the 2nd etc You put this into each device you want to boot from. I did it as the last line of my config for the device. My disks were different types and so I needed to use the boot order config. ...


0

I think what happens is that the initial performance of 30-40 MB/s is because of linux kernel's caching (and any other caching that may be going on on a hardware level). Once that caching has been "used up" actual disk access starts to kick in and performance drops. In addition in order for dd to have better performance set the bs= argument to a reasonably ...


3

Okey went to look in to one russian forum(i think) and there was english command: Add-windowsfeature hyper-v-powershell Which successfully installed powershell cmdlets (phew).


1

smeeb, Depending on what your trying to do as a developer. XEN, VirtualBox, VMware are all Hypervisor engines that are taking the real PC (Ram, HD, CPU, etc). And makeing them virtulized in a "Simulated" mannor. Keeping them abstracted from the real hardware layer of the HOST they are running on. If you writing code that is for the Host, the virtual ...


4

You can use the nproc shell script tool. So it would be -j$(nproc) in the make command line in question.


0

I'm not going to give the exact commands here, just the principles on what you need to accomplish, and things you need to understand. Are you REALLY using VLANs? How? On a switch? Multiple IP's on a single interface on your desktop? This is a firewall, unless you've downgraded to Junox 9.x then you may need to make firewall policy adjustments and NAT ...


1

After testing stuff out and googling found that it was network issue and was happening because of VQM and Broadcom Network Adapters. This post helped me solve it: http://www.reddit.com/r/sysadmin/comments/2k7jn5/after_2_years_i_have_finally_solved_my_slow/ Had to enable VQM everywhere and create registery value BelowTenGigVqmEnabled with value of 1 in ...


1

Inntran's is right here: you can't use VM acceleration without loading a kernel module/driver, which need administrative privileges. However, this seems a bad method of software distribution to mee: you don't need to deploy a Ubuntu images on every client, you simply need to install a single, shared instance and use it via SSH (for text-only programs) or ...


2

RHEV can support nesting however, for this to be configured, your "overlords" need to do the setup first. What you can do instead, if your VM has the resources, is use containers inside it. LXC and Docker come to mind, with Vagrant lagging behind (it requires vbox, which is still doable). If the app supports it, I'd even try and make do with a simple ...


0

Ok, so it was a storage issue. Hosted engine images was hosted by a gluster volume and the image was in a split-brain situation. Thanks dyasny for your help!!!


0

Try swapping interface configurations in DomU. According to your Dom0 configuration, you should use eth0 for private and eth1 for public IP's in your DomU.


1

I found where these terms were coming from: http://www.vmware.com/files/pdf/VMware_paravirtualization.pdf. With x86 computer virtualization, a virtualization layer is added between the hardware and operating system So, my guess was valid. By Hardware Virtualization they did mean virtualization with type-1 (== hardware-based, bare-metal) hypervisor.


1

Hardware assisted virtualization is a feature of the CPU. It helps software to do virtualization. Software such as Xen, KVM, VMWare etc. In the case of Amazon (unless it's changed recently?) they use a customized version of the Xen hypervisor. Xen supports both paravirtual (linux) and hvm (linux/windows) guest images. HVM requires Intel Virtualization ...


0

No, it is not possible to terminate SSL at the Azure endpoint directly, unfortunately. Your options are either to terminate at the VM, or use a different load balancer such as Kemp VLM.


1

What you describe is not possible. Buy a computer with the fastest CPU you can find (number of cores/threads is unimportant).


1

If the data, that the application processes can be divided into smaller packs, you can run multiple copies of the application, each processing part of the data and then try to put together the result (i.e. with a script).


-2

The cfgadm command works on all Solaris systems EXCEPT non-global Zones: cfgadm > /dev/null 2>&1 if [ $? -ne 0 ]; then #cfgadm command failed, must be a non-global zone: echo "This is a non-global zone". fi


2

The amount of video memory is dictated by maximum screen resolution you expect to use. I think ESXi provides some sort of calculator with their client but rougly it is screen_width x screen_height x 4. I usually set 16mb as it is good enough for up to 4K resolution, so your 32MB is a plenty. Update: Based on your comment I think you are missing an important ...


6

For virtual machine, the physical video memory of your server is not used, so it's not a problem. And besides, on servers, you don't do graphic intensive stuff, you only display a linux console or a windows desktop with low graphic needs, unless you're planning to use your server to do 3D stuff, but in this case, the graphic cards is so important that you ...


0

Some time ago I found out what I was doing wrong. I was creating the network in bridge in YAST, the configuration tool for OpenSUSE. However you should (of course..) create the network bridge in the virt-manager tool: http://i.stack.imgur.com/4m7WY.png Inside this window I can configure everything I want. You can also configure the network interfaces ...


0

Think about OpenVZ is not a fully virtualization solution but a container virtualization one http://en.wikipedia.org/wiki/OpenVZ#OpenVZ_compared_to_other_virtualization_technologies. Its aim is to run lightweiht virtual servers with less overhead than an hypervisor. The processes are fully separated from different OS instances (Guests) but the Host itself ...


1

OpenVZ is not a virtualization solution - it's a container solution. There's only a single kernel instance, and that kernel knows about all processes running on the system, regardless of whether or not they're in a container. For this reason and many others, OpenVZ is not well-liked among professional sysadmins - it's a lowest-common-denominator solution ...


0

We've since installed Veeam ONE which has shed quite a bit of light on where our performance issues are. By looking at the CPU Bottlenecks screen in Veeam ONE then using Troubleshooting a virtual machine that has stopped responding: VMM and Guest CPU usage comparison as a reference we've figured out where allot of our "unacceptable" contention is. One ...



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