On Fri, Aug 5, 2011 at 2:14 PM, Lance Couture wrote:
> We are looking at implementing KVM-based virtual machines in our HPC cluster.
>
> Our storage runs over Infiniband using RDMA, but we have been unable to find
> any real documentation regarding Infiniband, let alone using RDMA.
usually it's
On Tue, Mar 1, 2011 at 4:44 PM, Nikola Ciprich wrote:
> I guess that on host, the higher frequency can be better, but for guest,
> 100HZ should be better because it causes lower overhead for host, right?
or NO_HZ?
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th
On Mon, Mar 28, 2011 at 3:31 PM, Marcin M. Jessa wrote:
> How is OCFS2 compared to CLVM?
different layers, can't compare.
CLVM (aka cLVM) is the cluster version of LVM, the volume manager.
the addition of a userspace lock manager lets you do all volume
management (create/delete volumes, resize t
On Wed, Jun 6, 2012 at 9:57 AM, Michael Johns wrote:
> a small
> database from which small amounts of information about running
> machines which indicated the presence or not of virtual machine
> instances.
pgrep works beautifully, especially when using the -name option
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On Fri, Jun 15, 2012 at 4:08 AM, sguazt wrote:
> I've found some suggestions here:
>
> http://forums.meulie.net/viewtopic.php?f=43&t=6436
> http://serverfault.com/questions/324265/equivalent-of-xen-capping-in-kvm
>
> but none of those are native to KVM.
what do you mean 'native to KVM'?
kvm is p
On Fri, Jun 15, 2012 at 6:39 AM, sguazt wrote:
> With "native" I meant that I'd like to have a credit-based scheduling
> mechanism specifically targeted to VMs, without affecting the other
> processes of the host machine.
just put the VMs on their own cgroup
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1: no. what you're asking can't be done. if it was possible, every
chipmaker would implement it in silicon to create über-fast
single-processors on top of multicore chips.
2: why do you think "course amd-v+KVM is impossible to be used" ?? it
does work very well
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On Wed, Jul 4, 2012 at 2:44 PM, wrote:
> Thank you very much for your explanation, it makes sense :-)
>
>>2: why do you think "course amd-v+KVM is impossible to be used" ?? it does
>>work very well
> Not for me, it is some old RedHat version that fails on boot under KVM, but
> works well (but
On Thu, Feb 23, 2012 at 11:42 AM, Stefan Hajnoczi wrote:
> The other approach is a memory page "discard" mechanism - which
> obviously requires more code changes than zeroing freed pages.
>
> The advantage is that we don't take the brute-force and CPU intensive
> approach of zeroing pages. It wou
On Fri, Nov 19, 2010 at 2:47 PM, hadi golestani
wrote:
> Hello,
> I need to limit the port speed of a VM to 10 mbps ( or 5 mbps if it's
> possible).
> What's the way of doing so?
tc
check http://lartc.org/howto/lartc.qdisc.html
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On Sat, Nov 20, 2010 at 3:40 AM, Thomas Mueller wrote:
> maybe one of the virtual network cards is 10mbit? start kvm with "-net
> nic,model=?" to get a list.
wouldn't matter. different models emulate the hardware registers
used to transmit, not the performance.
if you had infinitely fast proce
On Tue, Jan 4, 2011 at 11:19 AM, Erich Weiler wrote:
> Thanks for replying! I was able to figure it out - it was not the fault of
> KVM. One of the guests was running ganglia gmetad which was updating 30,000+
> rrd files every 15 seconds (thus generating load via disk I/O), I didn't spot
> th
On Tue, Oct 9, 2012 at 9:36 AM, Grzegorz Dwornicki wrote:
> I have a question to you guys. Is it possible to use code from live
> migration of KVM VMs to migrate other process?
As far as I can tell, no.
most of the virtualization facililites of KVM are implemented in the
kernel, but they're mana
On Fri, Oct 12, 2012 at 9:25 AM, Stefan Hajnoczi wrote:
> I would leave them raw as long as they are sparse (zero regions do not
> take up space). If you need to copy them you can either convert to
> qcow2 or use tools that preserve sparseness (BTW compression tools are
> good at this).
note tha
On Fri, Oct 12, 2012 at 3:56 PM, Lukas Laukamp wrote:
> I think that it must be possible to create an image with a size like the
> used space + a few hundret MB with metadata or something like that.
the 'best' way to do it is 'from within' the VM
the typical workaround is to mount/fsck a LVM sna
On Sat, Oct 13, 2012 at 5:25 PM, Lukas Laukamp wrote:
> I have backed up the data within the machine with partimage and fsarchiver.
> But it would be greate to have a better way than doing this over a live
> system.
make no mistake, the absolutely best way is from within the VM. It's
the most co
On Fri, Apr 9, 2010 at 5:17 PM, Mohammed Gamal wrote:
> That's all good and well. The question now is which direction would
> the community prefer to go. Would everyone be just happy with
> virtio-9p passthrough? Would it support multiple OSs (Windows comes to
> mind here)? Or would we eventually
On Sat, Apr 10, 2010 at 7:42 AM, Mohammed Gamal wrote:
> On Sat, Apr 10, 2010 at 2:12 PM, Jamie Lokier wrote:
>> To throw a spanner in, the most widely supported filesystem across
>> operating systems is probably NFS, version 2 :-)
>
> Remember that Windows usage on a VM is not some rare use case
On Mon, Apr 26, 2010 at 7:10 AM, Anthony Davis
wrote:
> the problem I have is that kvm currently has dhcp running and setting up
> NATs etc...
>
> I need to stop this, but still allow my current virtual machines access out,
> how would be the best way to do this?
use bridged networking
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On Saturday 27 September 2008, Zhao, Yu wrote:
> Greetings,
>
> Following patches are intended to support SR-IOV capability in the Linux
> kernel. With these patches, people can turn a PCI device with the
> capability into multiple ones from software perspective, which can benefit
> KVM and achieve
On Wed, Mar 10, 2010 at 8:15 AM, Avi Kivity wrote:
> 15 guests should fit comfortably, more with ksm running if the workloads are
> similar, or if you use ballooning.
is there any simple way to get some stats to see how is ksm doing?
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On Tue, Mar 23, 2010 at 2:21 PM, Joerg Roedel wrote:
> On Tue, Mar 23, 2010 at 06:39:58PM +0200, Avi Kivity wrote:
>> So, two users can't have a guest named MyGuest each? What about
>> namespace support? There's a lot of work in virtualizing all kernel
>> namespaces, you're adding to that.
>
> T
On Thu, Jun 24, 2010 at 1:32 PM, Freddie Cash wrote:
> * virt-manager which requires X and seems to be more desktop-oriented;
don't know about the others, but virt-manager runs only on the admin
station. on the VM hosts you run only libvirtd, which doesn't need X
in fact, that's what you get w
On Fri, Jul 2, 2010 at 10:55 PM, Emmanuel Noobadmin
wrote:
> This is a concern since I plan to put storage on the network and the
> most heavy load the client has is basically the email server due to
> the volume plus inline antivirus and anti-spam scanning to be done on
> those emails. Admittedly
Piavlo wrote:
> Alexander Graf wrote:
> > virtio drivers have nothing to do with CPU.
>
> Yes I mistakenly used the term "viritio drivers" instead of
> "paravirtual guest support". So what I wanted to ask is if I build a
> guest kernel with paravitual support
> will it make the native hardware cpu
On Wednesday 11 June 2008, Freddie Cash wrote:
> The script can be run as a normal user, as it will use sudo where
> needed. However, this causes all the VMs to be run as root (this is
> developed on Debian where they've added that annoying "feature" of not
> being able to create/use tun/tap devic
On Wednesday 11 June 2008, Chris Webb wrote:
> Hi. I have a small 'qemu-send' utility for talking to a running qemu/kvm
> process whose monitor console listens on a filesystem socket, which I think
> might be a useful building block when extending these kinds of script to do
> things like migratati
On Tuesday 29 July 2008, Stephen Liu wrote:
> # kvm -hda ubuntu6.06.img -cdrom /dev/scd0 -m 512 -boot d -vnc :1
>
> It was hanging there.
it's not a hang. it's running, but all feedback goes to the VNC port. maybe
you'd like it to run in the background, so you get the prompt back. just add
a
On Tue, Dec 18, 2012 at 4:41 PM, Andrew Holway wrote:
> How should I set up io scheduling with this configuration. Performance is not
> so great and I have a feeling that all of the io schedulers in my VMs and the
> ones on my host are not having a nice party together.
most external storage uni
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