Search results

  1. M

    Proxmox VE 1.9 released!

    Run latencytop and powertop to see where your system/programs may be blocked.
  2. M

    Better disk format and net (virtio or scsi)

    Mainly for legacy systems (SCSI-only support, IDE-only support etc.).
  3. M

    Proxmox 1.8 Patch : vm disks iostats

    Will this work for VMs with file-based images (qcow2, raw)?
  4. M

    New Proxmox VE kernels 2.6.18, 2.6.32 and 2.6.35 released to stable

    You may want to check what (read, write) caching your controller has set. There are also caches you can set per drive attached to the controller card. Setting all this can make a really big difference. Also, if you have no BBU, the controller may disable all caches. Unfortunately, each hardware...
  5. M

    Ubuntu 10.04.2 KVM fresh install, inoperable w/ high events/1 usage due to virtio nic

    Re: Ubuntu 10.04.2 KVM fresh install, inoperable w/ high events/1 usage due to virtio No difference. The problem is "fixable" by installing a newer kernel in the Ubuntu guest, i.e. from http://kernel.ubuntu.com/~kernel-ppa/mainline/ Other thing is how to install this kernel, if the guest...
  6. M

    Proxmox - Guest USB support?

    AFAIK, KVM only supports USB 1.0. So for most devices, you're out of luck...
  7. M

    Ubuntu 10.04.2 KVM fresh install, inoperable w/ high events/1 usage due to virtio nic

    Re: Ubuntu 10.04.2 KVM fresh install, inoperable w/ high events/1 usage due to virtio I saw the same issue with Ubuntu 10.04 VMs. Updating to a newer kernel (on the client) from http://kernel.ubuntu.com/~kernel-ppa/mainline/ solved the issue.
  8. M

    Memory Ballooning

    With ballooning, upon quest start, you specify the maximum amount of memory available to the guest. In other words, if you want your guest to have 1 GB of RAM, but you still want to be able to increase it to 4 GB when needed, you have to do: - start the guest with balloon option and specify 4...
  9. M

    KSM is using about 30% of CPU time

    I used it on several servers, with 4 - 8 - 12 - 16 - 24 GB RAM. CPU usage with default values was usually double-digit (on one core); with 100 ms value, it's somewhere between 1-6%.
  10. M

    KSM is using about 30% of CPU time

    Please set: KSM_SLEEP_MSEC=100 and restart ksmtuned.
  11. M

    KSM is using about 30% of CPU time

    A proper "fix" is to decrease time interval KSM scans the memory. By default, it's 10 ms, a good value for me is 100 ms: KSM_SLEEP_MSEC=100 If KSM is to "merge" pages, and then unmerge them after 20 ms, and then merge after 10 ms, in reality, you don't save anything but cause CPU load...
  12. M

    Windows 2008 virtio drivers?

    It wasn't a problem with driver signing - in 64 bit Windows 2008, the device was "broken", according to Windows. Could be that the drivers in that link would behave better - I have no way to try anymore, since I have a 32 bit version running already and it's enough for me.
  13. M

    Windows 2008 virtio drivers?

    I could make it work with Windows 2008 32 bit (both disk and net). With a 64 bit version of Windows 2008, neither disk nor net virtio driver worked.
  14. M

    Windows 2008 virtio drivers?

    Does anyone have success using KVM virtio drivers with Windows 2008 (64 bit)? I tried using NetKVM and viostor listed here: http://www.linux-kvm.org/page/WindowsGuestDrivers/Download_Drivers But as I try to install these drivers, I get "error code 39" when installing any of these drivers...
  15. M

    USB Printer to KVM

    Qemu only supports USB1. Most devices expect USB2. So even if the device is properly detected and drivers are installed, it may still not function. Or even BSOD Windows (i.e. very common with printers). I wonder if USBIP would work better - i.e. Proxmox VE as a host, Windows KVM as a client...
  16. M

    I/O and bandwidth limit

    iostat will give you per block device statistics. If you have multiple guest images on one block device, you won't see much. In other words: you will see stats per guest if each "guest disk" is placed on a separate LVM volume. If you have guest images in files (i.e. qcow2) placed on one mount...
  17. M

    I/O and bandwidth limit

    If your virtual machines are on separate block devices (i.e. LVM), you can view their IO activity with "iostat".
  18. M

    I/O and bandwidth limit

    I never used it, but it's not dead (last patches were made on January 2010). You may find more details by asking at dm-devel mailing list: http://sources.redhat.com/dm/
  19. M

    I/O and bandwidth limit

    Some kernel patching may be needed - generally, look around the terms mentioned here: http://sourceforge.net/apps/trac/ioband/
  20. M

    virtio-net crashing (stop sending traffic)

    BTW, you may also try to increase /proc/sys/vm/min_free_kbytes on the guest.

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