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[Qemu-discuss] qemu-img convert will increase the VM image

From: xuanmao_001
Subject: [Qemu-discuss] qemu-img convert will increase the VM image
Date: Wed, 11 Sep 2013 15:14:52 +0800

Hi, all:
I have question about qemu-img convert ...
I have a orignal image with following information:
# qemu-img info ori.qcow2       
image: ori.qcow2
file format: qcow2
virtual size: 2.0G (2097152000 bytes)
disk size: 308M
cluster_size: 65536
when I executed with "qemu-img convert -f qcow2 -O qcow2 ori.qcow2 new.qcow2"
the new.qcow2 like following:
# qemu-img info new.qcow2 
image: new.qcow2
file format: qcow2
virtual size: 2.0G (2097152000 bytes)
disk size: 748M
cluster_size: 65536
so, my question is why the image size increased after my operation?


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