On Fri, Nov 20, 2009 at 7:28 PM, Jensen Lee <[email protected]> wrote:
> I created a xen domU and using the Virtual Machine Manager. This created a 
> large file on a zfs filesystem (in /var/lib/xen/images) containing the 
> virtual disk image.
>
> Is there a better way to create a virtual disk? Does zpool/zfs allow to 
> create special devices/filesystems with better I/O performance than a file 
> over a zfs space?

ZFS allows you to create block devices, called zvols, that can be used
for this.  The following will create a 10 GB zvol with the name
rpool/vol1.

# zfs create -V 10G rpool/vol1

When creating the domu in the Virtual Machine Manager, select "Block
device (partition)" and enter the path as:

/dev/zvol/dsk/rpool/vol1


Ed Plese
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