1
vote
1answer
87 views

libvirt Storage Backend

libvirt supports several storage backends[1] for hosting the image on a different server. We have 6 servers running about 40 VMs. Up to now we use local storage, but to minimize the downtime we want ...
0
votes
2answers
187 views

qemu don't start quest with disk image on tmpfs

I have 32bit windows 2k3r3 guest (terminal server) with 4GB guest ram and swapping. I created separate disk image for guest swapping and user's temp dirs. I have enouth RAM in host system and want ...
1
vote
3answers
165 views

Storage for KVM virtualization

I am looking into setting up 3 kvm hosts. Currently I am using local storage with mirrored drives raid 1 for images. I am also using raw images. I was wondering if this is against best practices and I ...
9
votes
1answer
9k views

KVM and Libvirt - How do I hotplug a new virtio disk?

I am trying to hot-add a file-based disk to a running KVM virtual server. I've created a new disk from scratch using the command dd of=/home/cloud/vps_59/test.img bs=1 seek=5G count=0 and I was ...
4
votes
1answer
6k views

KVM guest io is much slower than host io: is that normal?

I have a Qemu-KVM host system setup on CentOS 6.3. Four 1TB SATA HDDs working in Software RAID10. Guest CentOS 6.3 is installed on separate LVM. People say that they see guest performance almost equal ...
3
votes
2answers
2k views

Sheepdog versus iSCSI for KVM

What is recommended storage solution as VM count grows? We currently have 5 VM servers (8 core, 32GB) and one storage server. Currently we have ~80 virtual machines running and the storage server's ...
-1
votes
1answer
184 views

virtualization platform: Ubuntu + KVM/Xen

performance and feature set offered by the latest Ubuntu 11.04? while it works best as virtual workstation with direct attached storage, what is the tool-stack offered for server virtualization ...
3
votes
2answers
5k views

KVM Guest using Physical SATA disk

Is there a way to get my Ubuntu server (running as a guest in KVM) to use one of the hosts SATA discs? I Want it to have exclusice access and I beleve there sould be a "native" way. I have googled ...
1
vote
1answer
428 views

Shared storage for VMs without dedicated storage server

On a legacy project I've got 4 physical machines (servers, PM's) where each server has access to the SAN and fixed-space by it's own two devices (via device-mapper multipath). The local disks of the ...
8
votes
3answers
5k views

LVM volume group shared between KVM/libvirt host and guests: is this a bad idea?

I have just built a shiny new KVM/libvirt-based virtual machine host, containing 4 SATA II hard drives, and running CentOS 5.5 x86_64. I have decided to create virtual machine disks as logical ...