Arnd Bergmann wrote: > On Thursday 19 July 2007, Anthony Liguori wrote: > >>> Interestingly, once you have the kernel driver that maps a block device, >>> you can do most of the useful user scenarios by means of /dev/loop >>> and/or device mapper. >>> >> Not quite. Using device mapper to implement something like qcow turns >> out to be pretty painful. >> > > Right. Note that I said 'most scenarios', not all ;-) > > I don't understand enough about qcow to see why you can't do the same > with simple dm snapshots, but I'm sure there is a reason to have it. > >
The biggest advantages of qcow over dm are that it's a file, not a block device, so it's administrable as a user, can be transported as a file, etc. For non-root setups, it's unbeatable. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
