6.22 Virtualization

The following are caveats for setting up OES 11 server in Xen VMs:

6.22.1 Always Close Virtual Machine Manager When Not in Use

You should always close Virtual Machine Manager (VMM) when you are not actively using it. Virtual Machines are not affected.

Leaving VMM open can affect the system resources available to the VMs.

6.22.2 Always Use Timesync Rather Than NTP

Time synchronization problems have been observed when virtualized NetWare servers are running the XNTPD NLM. Therefore, Novell strongly recommends using Timesync and also configuring the service to communicate through NTP.

6.22.3 Backing Up a Xen Virtual Machine

When backing up a Xen virtual machine running virtualized NetWare, we recommend using a remote backup source rather than a local tape device because of limitations in detecting a local tape device.

6.22.4 Time Synchronization and Virtualized OES

eDirectory relies on time being synchronized and connections with eDirectory are lost if the system time varies in the host operating system. Be sure you understand and follow the instructions in Virtual Machine Clock Settings in the Virtualization with Xen guide.

6.22.5 NSS Considerations

Make sure you follow these guidelines for using NSS volumes in connection with OES servers running in Xen VMs:

  • Both OES and NetWare Platforms: NSS pools and volumes must be created on only SCSI or Fibre Channel devices. You cannot use a file-based disk image, LVM-based disk image, or an SATA/IDE disk for the virtual machine.

  • OES: Data shredding is not supported.