xen discuss - Nov 2009 - Best way to create a vdisk on zpool/zfs

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?
-- 
This message posted from opensolaris.org

On Fri, Nov 20, 2009 at 7:28 PM, Jensen Lee <haydude@haydude.org>
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