On Tue, Dec 18, 2012 at 4:41 PM, Andrew Holway a.hol...@syseleven.de 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
On Sat, Oct 13, 2012 at 5:25 PM, Lukas Laukamp lu...@laukamp.me 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.
On Fri, Oct 12, 2012 at 9:25 AM, Stefan Hajnoczi stefa...@gmail.com 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
On Fri, Oct 12, 2012 at 3:56 PM, Lukas Laukamp lu...@laukamp.me 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
On Tue, Oct 9, 2012 at 9:36 AM, Grzegorz Dwornicki gd1...@gmail.com 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,
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, robert.kuc...@centrum.cz 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
On Fri, Jun 15, 2012 at 6:39 AM, sguazt marco.guazz...@gmail.com 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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Javier
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On Wed, Jun 6, 2012 at 9:57 AM, Michael Johns michaelj8...@gmail.com 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
--
On Thu, Feb 23, 2012 at 11:42 AM, Stefan Hajnoczi stefa...@gmail.com 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
On Fri, Aug 5, 2011 at 2:14 PM, Lance Couture la...@sfu.ca 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.
On Mon, Mar 28, 2011 at 3:31 PM, Marcin M. Jessa li...@yazzy.org 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
On Tue, Mar 1, 2011 at 4:44 PM, Nikola Ciprich extmaill...@linuxbox.cz 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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On Tue, Jan 4, 2011 at 11:19 AM, Erich Weiler bitscrub...@gmail.com 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),
On Sat, Nov 20, 2010 at 3:40 AM, Thomas Mueller tho...@chaschperli.ch 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
On Fri, Nov 19, 2010 at 2:47 PM, hadi golestani
hadi.golest...@gmail.com 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 Thu, Jun 24, 2010 at 1:32 PM, Freddie Cash fjwc...@gmail.com 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,
On Mon, Apr 26, 2010 at 7:10 AM, Anthony Davis
t...@specialistdevelopment.com 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
On Sat, Apr 10, 2010 at 7:42 AM, Mohammed Gamal m.gamal...@gmail.com wrote:
On Sat, Apr 10, 2010 at 2:12 PM, Jamie Lokier ja...@shareable.org wrote:
To throw a spanner in, the most widely supported filesystem across
operating systems is probably NFS, version 2 :-)
Remember that Windows usage
On Fri, Apr 9, 2010 at 5:17 PM, Mohammed Gamal m.gamal...@gmail.com 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
On Tue, Mar 23, 2010 at 2:21 PM, Joerg Roedel j...@8bytes.org 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
On Wed, Mar 10, 2010 at 8:15 AM, Avi Kivity a...@redhat.com 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 Mon, Feb 8, 2010 at 1:19 AM, Ross Boylan r...@biostat.ucsf.edu wrote:
Previous advice (to me and others) was to use -usbdevice tablet. I've
tried that, and a variety of kvm/qemu versions, but no luck.
check your guest's X11 config. if you didn't have -usbdevice tablet
when installing, the
On Wed, Oct 28, 2009 at 4:13 PM, Erik Rull erik.r...@rdsoftware.de wrote:
Any Ideas what happens here? I also started applications that were NOT
started with the QEMU32 CPU to prevent a caching - same problem.
just a couple guesses:
- maybe there's some JIT'ed code cached somewhere in the
On Fri, Oct 23, 2009 at 5:41 AM, MORITA Kazutaka
morita.kazut...@lab.ntt.co.jp wrote:
On Fri, Oct 23, 2009 at 12:30 AM, Avi Kivity a...@redhat.com wrote:
If so, is it reasonable to compare this to a cluster file system setup (like
GFS) with images as files on this filesystem? The difference
On Fri, Oct 23, 2009 at 9:58 AM, Chris Webb ch...@arachsys.com wrote:
If the chunks into which the virtual drives are split are quite small (say
the 64MB used by Hadoop), LVM may be a less appropriate choice. It doesn't
support very large numbers of very small logical volumes very well.
On Fri, Oct 23, 2009 at 2:39 PM, MORITA Kazutaka
morita.kazut...@lab.ntt.co.jp wrote:
Thanks for many comments.
Sheepdog git trees are created.
great!
is there any client (no matter how crude) besides the patched
KVM/Qemu? it would make it far easier to hack around...
--
Javier
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On Wed, Oct 14, 2009 at 7:03 AM, Avi Kivity a...@redhat.com wrote:
Early implementations of virtio devices did not support barrier operations,
but did commit the data to disk. In such cases, drain the queue to emulate
barrier operations.
would this help on the (i think common) situation with
On Fri, Oct 9, 2009 at 4:11 PM, Cameron Macdonell c...@cs.ualberta.ca wrote:
I'm trying to set up a number of VMs on a host that uses IP over infiniband
to its NFS server. I've been googling, but can't find any mention of
sharing a single IB interface between multiple VMs. Since its IPoIB, I
On Thu, Oct 1, 2009 at 4:00 PM, Shirley Ma mashi...@us.ibm.com wrote:
I talked to Mingming, she suggested to use different IO scheduler. The
default scheduler is cfg, after I switch to noop, the problem is gone.
deadline is the most recommended one for virtualization hosts. some
distros set it
On Thu, Sep 24, 2009 at 3:38 PM, Kenni Lund ke...@kelu.dk wrote:
I've done some benchmarking with the drivers on Windows XP SP3 32bit,
but it seems like using the VirtIO drivers are slower than the IDE drivers in
(almost) all cases. Perhaps I've missed something or does the driver still
need
On Wed, Sep 16, 2009 at 10:11 PM, Gregory Haskins
gregory.hask...@gmail.com wrote:
It is certainly not a requirement to make said
chip somehow work with existing drivers/facilities on bare metal, per
se. Why should virtual systems be different?
i'd guess it's an issue of support resources. a
On Fri, Sep 11, 2009 at 10:36 AM, Bruce Rogers brog...@novell.com wrote:
Also, when I did a simple experiment with vcpu overcommitment, I was
surprised how quickly performance suffered (just bringing a Linux vm up),
since I would have assumed the additional vcpus would have been halted the
On Tue, Aug 25, 2009 at 1:11 PM, Christoph Hellwigh...@lst.de wrote:
- barrier requests and cache flushes are supported by all local
disk filesystem in popular use (btrfs, ext3, ext4, reiserfs, XFS).
However unlike the other filesystems ext3 does _NOT_ enable barriers
and cache flush
On Wed, Aug 12, 2009 at 3:43 PM, Gregory
Haskinsgregory.hask...@gmail.com wrote:
In any case, I have updated the graphs on the AlacrityVM wiki to reflect
these latest numbers:
pseudo-3D charts are just wrong
(http://www.chuckchakrapani.com/articles/PDF/94070347.pdf)
--
Javier
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To
On Tue, Jul 7, 2009 at 6:31 AM, Cristi
Magherusancristi.magheru...@net.utcluj.ro wrote:
The kernel will be 2.6.24 because it's smaller. I know this mismatch may
not be good, but I have to get to a compromise. The kernel needs to be
as small as possible (everything should fit in a 4MB BIOS
On Mon, Jul 6, 2009 at 8:28 AM, Michael Tokarevm...@tls.msk.ru wrote:
Javier Guerra wrote:
it also bothers me because when i have a couple of moderately
disk-heavy VMs, the load average numbers skyrockets. that's because
each blocked thread counts as 1 on this figure, even if they're all
Lars Ellenberg wrote:
On Thu, Jul 02, 2009 at 11:55:05PM +0400, Michael Tokarev wrote:
drbd: what's the difference in write pattern on secondary and
primary nodes? Why `rotational' flag makes very big difference
on secondary and no difference whatsoever on primary?
not much.
disk
On Fri, Jul 3, 2009 at 9:00 AM, Lars Ellenberglars.ellenb...@linbit.com wrote:
the elevator of the lower level block device (in this case,
the kvm virtual block device, or the host real block device)
so, the original post (Michael) was running drbd on the KVM guests??
i thought the only
On Thu, Jul 2, 2009 at 2:55 PM, Michael Tokarevm...@tls.msk.ru wrote:
kvm: i/o threads - should there be a way to control the amount of
threads? With default workload generated by drbd on secondary
node having less thread makes more sense.
+1 on this. it seems reasonable to have one
On Mon, Jun 15, 2009 at 6:43 AM, Avi Kivitya...@redhat.com wrote:
(I'd be quite happy constructing the entire machine config on the command
line, but I realize it's just me)
as a user-only (well, i'm a developer, but don't meddle in kernel
affairs since 0.99pl9); I also like that kvm is totally
On Tue, Jun 2, 2009 at 4:38 PM, Avi Kivity a...@redhat.com wrote:
Andrew Theurer wrote:
P.S. Here is the qemu cmd line for the windows VMs:
/usr/local/bin/qemu-system-x86_64 -name newcastle-xdbt01 -hda
/dev/disk/by-id/scsi-3600a0b8f1eb1074f4a02b08a
Use: -drive
On Mon, Jun 1, 2009 at 9:41 AM, Riccardo Veraldi
riccardo.vera...@cnaf.infn.it wrote:
Hello,
I have always created my guests by hand with qemu-kvm syntax.
Is there a way to control and manage KVM guests with libvirt without being
forced to create the guest with virtmanager or with virtsh ?
On Mon, Jun 1, 2009 at 11:02 AM, Riccardo Veraldi
riccardo.vera...@cnaf.infn.it wrote:
thank you very much.
How do I know all the XML tag options ??
how to convert from comand line quemu options into XML tags ?
and here to put XML file ?
you'll have to play around a little with a test
On Wed, May 20, 2009 at 5:42 AM, Pradeep K Surisetty
pradeepkum...@in.ibm.com wrote:
3.start guest install
qemu-kvm -cdrom SLES-11-DVD-x86_64-GM-DVD1.iso -drive
file=sles11.raw,if=scsi,cache=off -m 512 -smp 2
4. After the guest install boot up from the image.
qemu-kvm -boot c sles11.raw
any
On Thu, May 14, 2009 at 9:16 AM, Gilberto Nunes
gilberto.nu...@selbetti.com.br wrote:
Hi all
I'm newbie on list.
I have deploy a system here, with a Ubuntu Server running KVM.
Well, when I run virt-clone command, I get this error:
CMD: virt-clone -o vm01 -n VMUbuntu-2 -f /virt/ubuntu-2.img
On Mon, May 4, 2009 at 9:49 AM, howard chen howac...@gmail.com wrote:
On Mon, May 4, 2009 at 10:44 PM, Pasi Kärkkäinen pa...@iki.fi wrote:
On Mon, May 04, 2009 at 10:40:00PM +0800, howard chen wrote:
Yes, paravirtualization is good. If running KVM, use paravirtualized network
and disk/block
On Thu, Apr 30, 2009 at 4:49 PM, Paul Brook p...@codesourcery.com wrote:
One of the nice things about scsi is it separates the command set from the
transport layer. cf. USB mass-storage, SAS, SBP2(firewire), and probably
several others I've forgotten.
ATAPI, SCSIoFC, SCSIoIB
--
Javier
On Wed, Apr 1, 2009 at 7:27 AM, Vasiliy Tolstov v.tols...@selfip.ru wrote:
Hello!
I have two containers with os linux. All files in /usr and /bin are
identical.
Is that possible to mount/bind /usr and /bin to containers? (not copy
all files to containers).. ?
the problem (and solution) is
On Tue, Mar 31, 2009 at 12:01 PM, Gerry Reno gr...@verizon.net wrote:
Charles Duffy wrote:
I put the xml stanza in the file and undefine/define domain but it gives an
error about cannot read image file.
source file=/media/Fedora 10 DVD/
And I check this path and I can read all the files from
On Tue, Mar 31, 2009 at 1:53 PM, Gerry Reno gr...@verizon.net wrote:
Boot Failure Code: 0003
Boot from CDROM failed: cannot read the boot disk.
FATAL: No bootable device.
your underlying problem is that you can't get libvirt to generate the
appropriate command line. you really should take
On Tue, Mar 31, 2009 at 2:13 PM, Gerry Reno gr...@verizon.net wrote:
Javier Guerra wrote:
your underlying problem is that you can't get libvirt to generate the
appropriate command line. you really should take it to the libvirt
list
Ok, can you give me a command line that will work
On Tue, Mar 31, 2009 at 5:52 PM, Gerry Reno gr...@verizon.net wrote:
Ok, I've been working with this for a couple hours but this command line
errors on F10 like this:
# /usr/bin/qemu-kvm -S -M pc -m 512 -smp 2 -name MX_3 -monitor pty -boot d
-drive
On Mon, Mar 30, 2009 at 10:15 AM, Tomasz Chmielewski man...@wpkg.org wrote:
Still, if there is free memory on host, why not use it for cache?
because it's best used on the guest; which will do anyway. so, not
cacheing already-cached data, it's free to cache other more important
things, or to
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 features
On Thu, Feb 26, 2009 at 7:57 AM, Piavlo pia...@cs.bgu.ac.il wrote:
What is still unclear to me is that's the actual difference between PV
drivers implementation in paravirtual
linux guest and PV dirvers in HVM linux guest? AFAIK in xen guest the PV
front-end drivers are quite simple, and in
On Wed, Feb 25, 2009 at 8:20 AM, Tomasz Chmielewski man...@wpkg.org wrote:
Is it possible to make snapshots when using raw devices (i.e. disk,
partition, LVM volume) as guest's disk image?
According to documentation[1] (and some tests I made) it is only possible
with qcow2 images. Which makes
On Wed, Feb 25, 2009 at 9:31 AM, Tomasz Chmielewski man...@wpkg.org wrote:
The VM state info is stored in the first qcow2 non removable and
writable block device. The disk image snapshots are stored in every
disk image.
Or, am I making a mistake here?
ah, i misremembered that.
--
On Wed, Jan 28, 2009 at 5:47 PM, Christian Roessner
christ...@roessner-net.com wrote:
Hello,
excuse me for this little question. I found the
-vga vmware
option. I have tried any tricks I new to get the WinXP driver installed,
hi,
i tried that too, but then found that somewhere it says
On Thu, Jan 15, 2009 at 3:05 AM, paolo pedaletti
paolo.pedale...@gmail.com wrote:
Ciao Толя,
Is there any way to assign single partition to KVM virtual machine (for
example, i need to assign /dev/sda1 on my host as /dev/hda1 on VM)
In XEN this assignment looks like disk=[
On Thu, Oct 30, 2008 at 4:41 AM, Matthew Faulkner
[EMAIL PROTECTED] wrote:
I go no respone. So i started with a lower packet size and figured out
below a size of 4054 packets were sent and recevied (without ip
fragmentation), however, as soon as the packets were = 4055 it
stopped working.
Is
On Fri, Oct 10, 2008 at 10:24 AM, Simon Gao [EMAIL PROTECTED] wrote:
I am wondering to how to start a KVM guest OS headless, ie, no
monitoring window? And I can attach to the guest's console if I want to.
-vnc displaynum
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On Wed, Sep 3, 2008 at 4:27 PM, Thomas Lockney [EMAIL PROTECTED] wrote:
On Wed, 2008-09-03 at 12:39 -0500, Charles Duffy wrote:
Would it not address your security concerns to build a modular kernel,
load the current kvm module, and then drop CAP_SYS_MODULE as part of
your boot scripts?
Seems
On Mon, Aug 18, 2008 at 1:21 PM, Max Krasnyansky [EMAIL PROTECTED] wrote:
Javier Guerra wrote:
what about doing it the other way around? that is, setting udev
scripts that notify KVM of the hardware changes.
That seems a bit odd. What if you have more than one QEMU instance and
stuff
On Fri, Aug 15, 2008 at 1:24 PM, Max Krasnyansky [EMAIL PROTECTED] wrote:
btw Interface to HAL might still be useful in general to monitor other device
classes that we may want to automatically assign to the VMs. So I'll play
around with that too (some day :)).
what about doing it the other
On Thu, Aug 7, 2008 at 9:23 AM, Dietmar Maurer [EMAIL PROTECTED] wrote:
What is the suggested way to backup a running kvm instance which uses
several disk images? Currently I simply use a LVM2 snapshot if all disk
images resides on one lvm volume. But what if it uses several lvm
volumes?
i'd
On Thu, Aug 7, 2008 at 9:51 AM, Dietmar Maurer [EMAIL PROTECTED] wrote:
I thought about using 1 lvm volume, but splitting that into slices
somehow, which can then be used as kvm disks - maybe by implementing a
very simple filesystem (block mapper). The problem with this approach is
that
On Fri, Aug 1, 2008 at 10:41 AM, Stephen Liu [EMAIL PROTECTED] wrote:
Hi folks,
Ubuntu 8.04 server amd64 - host
Ubuntu 6.06 server amd64 - guest
KVM 1:62+dfsq
UBS enclosure
Please advise how to mount the USB enclosure to guest. It can be
mounted on host. Pointer would be appreciated.
On Wed, Jul 23, 2008 at 11:15 PM, Bill Davidsen [EMAIL PROTECTED] wrote:
Your easy way seems to mean using Debian, other distributions don't have
some of the scripts, or they are in different places or do different things.
Other thoughts below.
yep, on Gentoo and SuSE i didn't find the
On Mon, Jul 7, 2008 at 3:09 PM, Sukanto Ghosh
[EMAIL PROTECTED] wrote:
3. Are there any means to do content-based page sharing between guests
as VMware does ?
is it VMWare, or NetApp the one doing this? or you mean RAM page
sharing? if so, sounds like a big performance tradeoff for a little
On Thu, Jul 3, 2008 at 3:03 AM, Mark McLoughlin [EMAIL PROTECTED] wrote:
I think the below fixes the data corrupter, but I'm still tracking down
another issue where the guest is hanging waiting for I/O to complete
with the latest virtio-blk backend.
is that a common case? i haven't been able
On Tue, Jul 1, 2008 at 10:38 AM, Andy Smith [EMAIL PROTECTED] wrote:
Hi,
Is it possible at the moment to export a single partition to a kvm
guest as a virtio block device, like you can with Xen? e.g. with
LVM on the host, /dev/somevg/somelv - /dev/vda1 ?
in Xen this is only possible for PV
On Tue, Jun 17, 2008 at 8:44 AM, Martin Michlmayr [EMAIL PROTECTED] wrote:
Sorry, Anthony, I just realized I misparsed your response. So you're
saying that it's a known issue and that VMware is the problem. Thanks
a lot! I'll take it up with VMware.
i think what he's saying is that VMWare
i got it running under non-root.
first, i used to have a group 'kvm', and /dev/net/tun is writable by
this group. so, i made the 'temp' directories (/var/run/kvmctl/, and a
couple extra) also writable by the same group.
then, i added a couple calls to tunctl to pre-create the tap device
before
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