Hello Dietmar,
Thank you for your answer.
Best regards.
On 23/01/13 10:27, Dietmar Maurer wrote:
I have seen that when I create a new qcow2 hard disk, the file created in the
storate (a DRBD directory with ext4 file system) has the full size I have
assigned to that hard disk.
For example, I have created a new 32GB qcow2 hard disk for a KVM vitual
machine with ID 100. Before installing nothing into the virtual machine, if I
execute the command ls -al I get:
[...]
-rw-r--r-- 1 root root 34365243392 Jan 23 10:01 vm-100-disk-1.qcow2 [...]
That is, the file has already the 32GB that I have setup for the new hard disk.
Why?
Yes, we pre-allocate metadata now.
Before the last Proxmox update, when I created a new qcow2 hard drive the
new file has only a few megabytes.
But if I execute the command du -sh over the virtual machine directory I
get:
[...]
5.5M
[...]
The file is 'sparse', so it actually uses only a few MBs.
If I copy the file to another computer, the copy has the 32GB too and if I
execute du -sh over the file I get the 32GB size.
You need to use a tool which can copy sparse files (rsync).
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