FastNetMon

Monday 28 January 2013

How to compress qcow2 to compressed qcow2?

Be aware! Do not forget stop container! Running this commands on running container is strongly prohibited! 


Example:
qemu-img convert  source_not_compressed_qcow2.img -O qcow2 -c  target_compressed_qcow2.img

Before:
ls -la source_not_compressed_qcow2.img
-rw------- 1 root root 1,5G Янв 28 06:37 source_not_compressed_qcow2.img

After:
ls -la target_compressed_qcow2.img
-rw-r--r-- 1 root root 578M Янв 28 06:54 target_compressed_qcow2.img
In my tests qcow2 with compression is very-very-very slow! 

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