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...qcow2 preallocation, as possible with qemu-img create -o > > preallocation=metada , for example? > > No .. but .. it does default to preallocation=metadata provided that > the output format is qcow2: > > https://github.com/libguestfs/libguestfs/blob/master/builder/builder.ml#L582-L585 I should say this only applies when the image needs to be resized (ie. you supply a --size parameter which != the size of the template), AND if the resize is the final step that the planner comes up with. https://rwmj.wordpress.com/2013/12/14/writing-a-planner-to-solve-a-tricky-programming-o...

When creating qcow2 images using virt-builder, is there a way to specify the qcow2 preallocation, as possible with qemu-img create -o preallocation=metada , for example? TIA, Y.

...> > preallocation=metada , for example? > > > > > > No .. but .. it does default to preallocation=metadata provided that > > > the output format is qcow2: > > > > > > > > https://github.com/libguestfs/libguestfs/blob/master/builder/builder.ml#L582-L585 > > > > I should say this only applies when the image needs to be resized > > (ie. you supply a --size parameter which != the size of the template), > > AND if the resize is the final step that the planner comes up with. > > > > > > https://rwmj.wordpr...

...here a way to specify > the qcow2 preallocation, as possible with qemu-img create -o > preallocation=metada , for example? No .. but .. it does default to preallocation=metadata provided that the output format is qcow2: https://github.com/libguestfs/libguestfs/blob/master/builder/builder.ml#L582-L585 https://github.com/libguestfs/libguestfs/blob/master/src/create.c#L281-L295 Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to ins...

...with qemu-img create -o > > > preallocation=metada , for example? > > > > No .. but .. it does default to preallocation=metadata provided that > > the output format is qcow2: > > > > > https://github.com/libguestfs/libguestfs/blob/master/builder/builder.ml#L582-L585 > > I should say this only applies when the image needs to be resized > (ie. you supply a --size parameter which != the size of the template), > AND if the resize is the final step that the planner comes up with. > > > https://rwmj.wordpress.com/2013/12/14/writing-a-planne...

...r example? > > > > > > > > No .. but .. it does default to preallocation=metadata provided that > > > > the output format is qcow2: > > > > > > > > > > > > https://github.com/libguestfs/libguestfs/blob/master/builder/builder.ml#L582-L585 > > > > > > I should say this only applies when the image needs to be resized > > > (ie. you supply a --size parameter which != the size of the template), > > > AND if the resize is the final step that the planner comes up with. > > > > > >...