Hi (Jeff?) I was testing blockcommit operations qemu-git, as of Oct-6th (which has your blockcommit code pulled in). And also w/ libvirt-git which has Eric's libvirt blockcommit patches applied.
with the goal of : actual state: [base] <-- [snap-1] <-- [snap-2] <-- [snap3] <-- [active-layer] desired state: [base] <-- [active-layer] When I actually do the operation, this is what I see ----------------------------------------------- $ virsh blockcommit --domain raw-base vda --wait --base /export/vmimgs2/raw-base.img --top /var/lib/libvirt/images/snap3-b-raw-base.qcow2 --verbose error: internal error unable to execute QEMU command 'block-commit': Could not open '/export/vmimgs2/raw-base.img' ----------------------------------------------- On libvirt list, Eric indicated it could be a problem in qemu's blockcommit code . Although blockcommit to a qcow2 base file works just fine. ----------------------------------------------- [root moon libvirt]# virsh blockcommit --domain f17-base vda --wait --base /export/vmimgs2/f17-base.qcow2 --top /export/vmimgs2/snap3-f17-base.qcow2 --verbose Block Commit: [100 %] Commit complete [root moon libvirt]# ----------------------------------------------- More info on tests I ran, posted to libvirt list -- https://www.redhat.com/archives/libvir-list/2012-October/msg00226.html Let me know if I can help you debug this further. /kashyap
