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</o:shapelayout></xml><![endif]--></head><body lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>How big are the actual image files? Because qcow2 is a sparse format, it does not store zeroes. If the free space in one image is zeroed out, it will convert much faster. If that is the problem, use „dd if=/dev/zero of=temp;sync;rm temp“ or zerofree.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tomas<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Paras pradhan [mailto:pradhanparas@gmail.com] <br><b>Sent:</b> Monday, July 31, 2017 11:54 PM<br><b>To:</b> openstack-operators@lists.openstack.org<br><b>Subject:</b> [Openstack-operators] custom build image is slow<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hello<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I have two qcow2 images uploaded to glance. One is CentOS 7 cloud image downloaded from <a href="http://centos.org">centos.org</a>. The other one is custom built using CentOS 7.DVD. When I create cinder volumes from them, volume creation from the custom built image it is very very slow.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>CenOS qcow2:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=gmail-p1>2017-07-31 21:42:44.287 881609 INFO cinder.image.image_utils [req-ea2d7b12-ae9e-45b2-8b4b-ea8465497d5a e090e605170a778610438bfabad7aa7764d0a77ef520ae392e2b59074c9f88cf 490910c1d4e1486d8e3a62d7c0ae698e - d67a18e70dd9467db25b74d33feaad6d default] <b>Converted 8192.00 MB image at 253.19 MB/s</b><o:p></o:p></p><p class=gmail-p1><o:p> </o:p></p><p class=gmail-p1>Custom built qcow2:<o:p></o:p></p></div><div><p class=gmail-p1>INFO cinder.image.image_utils [req-032292d8-1500-474d-95c7-2e8424e2b864 e090e605170a778610438bfabad7aa7764d0a77ef520ae392e2b59074c9f88cf 490910c1d4e1486d8e3a62d7c0ae698e - d67a18e70dd9467db25b74d33feaad6d default] <b>Converted 10240.00 MB image at 32.22 MB/s</b><o:p></o:p></p><p class=gmail-p1><o:p> </o:p></p><p class=gmail-p1>I used the following command to create the qcow2 file<o:p></o:p></p><p class=gmail-p1>qemu-img create -f qcow2 custom.qcow2 10G<o:p></o:p></p><p class=gmail-p1><o:p> </o:p></p><p class=gmail-p1>What am I missing ?<o:p></o:p></p><p class=gmail-p1><o:p> </o:p></p><p class=gmail-p1>Thanks<br>Paras.<o:p></o:p></p><p class=gmail-p1><o:p> </o:p></p><p class=gmail-p1><o:p> </o:p></p></div></div></div></body></html>