On 08/20/2013 06:11 AM, bigclouds wrote:
hi,all
could you tell me how vdsm implement qcow2 on lvm? and how  lv of qcow2
fromat support backing file?


qcow2 is the format, stored in an LV.
see http://www.ovirt.org/images/3/3d/OVirt_VDSM_Storage_20111102.pdf

if the implememt is a normal way, now i find libguestfs does not
recognize  lvs(qcow2 format)  with backing file

how are you trying to use it via libguestfs? you need vdsm to monitor qemu/qcow for lv extend requests to the SPM (or another similar solution)?

thanks




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