Creating Windows Instances » History » Version 4

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Владимир Ипатов, 12/04/2012 02:22 PM

Creating Windows Instances

System install

Copy installer ISO /stuff/cdimages

hЗ. Add new instance

gnt-instance add -t drbd --disk=0:size=20g --net=0:link=xen-lan -H xen-hvm:cdrom_image_path=/stuff/cdimages/ru_win_srv_2008_r2_sp2.iso,boot_order=cd,disk_type=ioemu,use_localtime=true -o windows+default -B memory=8g --no-ip-check --no-name-check -n gnt1:gnt2 w2k8

Connect to instance vnc console and install the system

You should use vncviewer to connect vnc console(e.g. from xtightvncviewer package).
address and port:

# gnt-instance info INSTANCE|grep vnc

On windows we recommend to use ultravnc:

GPLPV Driver install

After install you should add this drivers in system:
There is no additional actions after install.
You must reboot twice and check that disks in device manager your disk drives have disk type consist XEN word.

After install you may detach distribution iso:

# gnt-instance modify -H boot_order=c cdrom_image_path='' INSTANCE

Disable TaskOffload and TX Offloas

Without it there will be lags in rdp and in other tasks.

1. Load the Windows Registry editor - regedit.
2. Add a new DWORD key named DisableTaskOffload with a value of 1 to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. Restart server.

TX Offload May be disabled in NIC settings.

Set Time

  • Set "use_localtime=true" in the hypervisor parameters (as in the "instance add" example)
  • Set timezone in Windows
  • Set proper local time in Windows (via standard clock tool)
    this will set the time shift which will be saved upon shutdown
  • Reboot to verify that time shift is saved and taken in effect


RDP-6 in 32bpp generate less traffic than 24bpp and sometimes not more than 16bpp.

Default bpp policy setup:

Performance Tuning Guidelines for Windows Server 2008 R2