Re: dump/restore?

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On Tue, 2022-12-13 at 13:16 -0800, ToddAndMargo via users wrote:
> On 12/13/22 00:27, Samuel Sieb wrote:
> > On 12/11/22 05:22, ToddAndMargo via users wrote:
> > > Has dump/restore been superseded with something else?
> > > 
> > > It ain't work right!
> > > 
> > > dump restores a qcows drive as a blank drive
> > > https://bugzilla.redhat.com/show_bug.cgi?id=2152393
> > 
> > You might want to look into nbdkit and nbdkit-libvirt-plugin.
> > 
> > That should work for dump, but you'll have to convert the restored
> > data 
> > back into qcow again.
> 
> I successfully test restored four of my main VM
> disk files after converting them to "raw".
> 
> It may just be my perception, but I think raw
> just might be faster than qcows2

For many workloads it probably is, as qcow adds a layer of indirection
to filesystem access. However qcow also allows compression, sparse
files, encryption and copy-on-write snapshots (COW, hence the name)
independently of whether the underlying guest system supports these
things.

poc

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