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Hello

I have two qcow2 images uploaded to glance. One is CentOS 7 cloud image
downloaded from centos.org.  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.


CenOS qcow2:

2017-07-31 21:42:44.287 881609 INFO cinder.image.image_utils
[req-ea2d7b12-ae9e-45b2-8b4b-ea8465497d5a
e090e605170a778610438bfabad7aa7764d0a77ef520ae392e2b59074c9f88cf
490910c1d4e1486d8e3a62d7c0ae698e - d67a18e70dd9467db25b74d33feaad6d
default] *Converted 8192.00 MB image at 253.19 MB/s*


Custom built qcow2:

INFO cinder.image.image_utils [req-032292d8-1500-474d-95c7-2e8424e2b864
e090e605170a778610438bfabad7aa7764d0a77ef520ae392e2b59074c9f88cf
490910c1d4e1486d8e3a62d7c0ae698e - d67a18e70dd9467db25b74d33feaad6d
default] *Converted 10240.00 MB image at 32.22 MB/s*


I used the following command to create the qcow2 file

qemu-img create -f qcow2 custom.qcow2 10G


What am I missing ?


Thanks
Paras.
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