On 09/15/2011 02:34 PM, Orit Wasserman wrote:
> Then you need an iSCSI*target* that understands qcow2, like qemu-nbd
> but for iSCSI... that's exactly the thing you were worried about
> implementing.
Not really , this is just part of the target configuration.
For each file in the chain we create a lun in the target that is backed
by the file and we number the luns in chronological order (base is lun
1) . you can look at a tgtd configuration here
http://wiki.qemu.org/Features/LiveBlockMigration#Example_single_base_master_image.
That's surely a weird way to use iSCSI. :)
It's clever, but I would call that shared storage, since you need to
share the details of the snapshot chain between the source and
destination, down to the file names. We need a more precise nomenclature.
Paolo
