[Qemu-discuss] Qemu compress file

[Nguyễn Trường Sơn]

Hi all

I have a chain with two qcow2 files: base <- disk

My disk size increases too large, so i want to compress it.

I use the command line:

qemu convert -c -O qcow2 disk disk.compress -o backing_file=base

But when the compression is completed, my disk.compress seams to contain all the data in disk and base. I means, the size of disk.compress is larger than disk and base.

Can any one help?

thanks

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Nguyễn Trường Sơn