[sheepdog-users] About vdi restore

MORITA Kazutaka morita.kazutaka at gmail.com
Wed Jun 5 02:21:18 CEST 2013

At Mon, 3 Jun 2013 12:38:43 +0200,
Valerio Pachera wrote:
> > 2) the images created by vdi backup, are already compressed?
> > I noticed that the images size is smaller than the amount data I've
> > been writing between snapshots.
> Note: I've been writing file by dd if=/dev/zero.

The backup data is not compressed.  What collie does is only comparing
two VDIs and write a differential data to the backup file.

The reason you got a small backup file is that you overwrote the VDI
with /dev/zero and the contents were not changed.



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