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<p class="MsoNormal"><span lang="EN-US">I had test the command virsh blockcommit, but it failed, with the libvirt version 1.1.0, and qemu version 1.6.0.</span></p>
<p class="MsoNormal"><span lang="EN-US">Is this feature being developing? Thanks </span>
</p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">root@cvk-31:/vms/images# virsh -v</span></p>
<p class="MsoNormal"><span lang="EN-US">1.1.0</span></p>
<p class="MsoNormal"><span lang="EN-US">root@cvk-31:/vms/images# qemu-img -V</span></p>
<p class="MsoNormal"><span lang="EN-US">qemu-img version 1.6.0, Copyright (c) 2004-2008 Fabrice Bellard</span></p>
<p class="MsoNormal"><span lang="EN-US">usage: qemu-img command [command options]</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">root@cvk-31:/vms/images# virsh blockcommit Vmtest /vms/images/Vmtest1 --base /vms/image</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">s/Vmtest1_base --top /vms/images/Vmtest1_base_1 --wait --verbose ;echo $?</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">error: invalid argument: top '/vms/images/Vmtest1_base_1' in chain for '/vms/images/Vmtest1' has no backing file</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">root@cvk-31:/vms/images# qemu-img info /vms/images/Vmtest1_base_1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">image: /vms/images/Vmtest1_base_1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">file format: qcow2</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">virtual size: 9.8G (10485760000 bytes)</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">disk size: 6.0M</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">cluster_size: 2097152</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">backing file: /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">root@cvk-31:/vms/images# qemu-img info --backing-chain /vms/images/Vmtest1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">image: /vms/images/Vmtest1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">file format: qcow2</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">virtual size: 9.8G (10485760000 bytes)</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">disk size: 140M</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">cluster_size: 2097152</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">backing file: /vms/images/Vmtest1_base_1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">image: /vms/images/Vmtest1_base_1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">file format: qcow2</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">virtual size: 9.8G (10485760000 bytes)</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">disk size: 6.0M</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">cluster_size: 2097152</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">backing file: /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">image: /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">file format: qcow2</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">virtual size: 9.8G (10485760000 bytes)</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">disk size: 3.4G</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">cluster_size: 2097152</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">root@cvk-31:/vms/images# virsh blockcommit Vmtest /vms/images/Vmtest1 --base /vms/image</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">s/Vmtest1_base --wait --verbose ;echo $?</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">error: invalid argument: could not find base '/vms/images/Vmtest1_base' below '/vms/images/Vmtest1' in chain for '/vms/images/Vmtest1'</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">1</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">root@cvk-31:/vms/images# ls -al /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">-rw------- 1 root root 3705667584 Aug 23 10:19 /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">root@cvk-31:/vms/images# qemu-img info /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">image: /vms/images/Vmtest1_base</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">file format: qcow2</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">virtual size: 9.8G (10485760000 bytes)</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">disk size: 3.4G</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black">cluster_size: 2097152</span></p>
<p class="MsoNormal" align="left" style="text-align:left; line-height:12.0pt; text-autospace:none">
<span lang="EN-US" style="font-size:9.0pt; font-family:宋体; color:black"> </span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
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