<div dir="ltr">Hi Hitoshi,<br><br>Thanks for your response and for your time.<br>Correct me if I'm wrong.<br><br>I thought about using qcow2 to use qemu to have the ability to use internal shapshot.<br><br>To have a consistent image of my virtual machines using sheepdog, I think I should turn off the virtual machine, then make the snapshot ( dog vdi snapshot -s ) and then turn it on again.<br><br>Using internal snapshot feature of qcow2/qemu I could avoid switching off the machine.<br><br>External snapshot do not seem to be supported with sheepdog:<br><br># virsh snapshot-create-as test3 test3-backup --disk-only --atomic<br><br>error: unsupported configuration: source for disk 'vda' is not a regular file; refusing to generate external snapshot name<br><br>I'm thinking correctly or i am wrong?<br><br>Thanks,<br></div><div class="gmail_extra"><br><div class="gmail_quote">2016-09-29 7:45 GMT+02:00 Hitoshi Mitake <span dir="ltr"><<a href="mailto:mitake.hitoshi@gmail.com" target="_blank">mitake.hitoshi@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Wed, Sep 28, 2016 at 12:41 AM, Cristian Del Carlo <span dir="ltr"><<a href="mailto:cristian.delcarlo@targetsolutions.it" target="_blank">cristian.delcarlo@<wbr>targetsolutions.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div>Hi list,<br><br></div><div>sorry if i have another question.<br><br></div>I use sheepdog v0.9.3 and libvirt 1.2.17.<br></div>I have problems with qcow2.<br><br></div>I create the image with the command:<br>qemu-img create -f qcow2 -o preallocation=metadata sheepdog:test2.qcow2 20G<br><br></div>After the command i can check the image:<br><br># qemu-img info sheepdog:///test2.qcow2<br>image: sheepdog:///test2.qcow2<br>file format: qcow2<br>virtual size: 20G (21474836480 bytes)<br>disk size: unavailable<br>cluster_size: 65536<br>Format specific information:<br> compat: 1.1<br> lazy refcounts: false<br><br></div>But when i start to install a linux vm ( with virtmanager 1.3.2 ) if i repeat the command i have the following :<br><br># qemu-img info sheepdog:///test2.qcow2<br>image: sheepdog:///test2.qcow2<br>file format: raw<br>virtual size: 20G (21478375424 bytes)<br>disk size: unavailable<br><br></div>Even with "qemu-img convert" i have problem and i can work only with raw file.<br><br></div>Where is the problem?<br></div></blockquote><div><br></div></div></div><div>What is the motivation of using qcow2 format on sheepdog virtual block device? It is a very rare use case so the functionality would have bugs. If it is critical for you, could you open an issue on github?</div><div><br></div><div>Thanks,</div><div>Hitoshi</div><div> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><div dir="ltr"><div><div><div><br></div><div>I would like to use qcow2 to have the possibility to use the command "virsh snapshot-create --live vm".<br><br></div><div>Thanks.<br><br></div><div>Best regards,<div><div><div><div><div><div><div><div dir="ltr"><div><span></span><span></span><br></div><div><font><b><font color="#990000"><i><br></i></font></b></font></div><div><font><b><font color="#990000"><i>Cristian Del Carlo</i></font></b></font></div><br></div></div>
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