Re: [Qemu-devel] Qemu-img convert with -B

2011-04-28 Thread Brad Campbell
On 28/04/11 14:36, Kevin Wolf wrote: Am 28.04.2011 04:06, schrieb Brad Campbell: On 27/04/11 22:02, Brad Campbell wrote: On 27/04/11 21:56, Kevin Wolf wrote: When you don't have a backing file, leaving an cluster unallocated means that it's zero. When you have a backing file, it could be anyt

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Kevin Wolf
Am 28.04.2011 04:06, schrieb Brad Campbell: > On 27/04/11 22:02, Brad Campbell wrote: >> On 27/04/11 21:56, Kevin Wolf wrote: >> >>> When you don't have a backing file, leaving an cluster unallocated means >>> that it's zero. When you have a backing file, it could be anything. So >>> if qemu-img co

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Brad Campbell
On 27/04/11 22:02, Brad Campbell wrote: On 27/04/11 21:56, Kevin Wolf wrote: When you don't have a backing file, leaving an cluster unallocated means that it's zero. When you have a backing file, it could be anything. So if qemu-img convert wanted to save this space, it would have to read from

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Brad Campbell
On 27/04/11 21:56, Kevin Wolf wrote: When you don't have a backing file, leaving an cluster unallocated means that it's zero. When you have a backing file, it could be anything. So if qemu-img convert wanted to save this space, it would have to read from the backing file and leave the cluster un

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Kevin Wolf
Am 27.04.2011 15:45, schrieb Brad Campbell: > On 27/04/11 18:06, Kevin Wolf wrote: >> Am 27.04.2011 10:56, schrieb Brad Campbell: >>> On 27/04/11 16:10, Stefan Hajnoczi wrote: On Wed, Apr 27, 2011 at 4:05 AM, Brad Campbell wrote: > I see there is a bug raised about the behaviour of

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Brad Campbell
On 27/04/11 18:06, Kevin Wolf wrote: Am 27.04.2011 10:56, schrieb Brad Campbell: On 27/04/11 16:10, Stefan Hajnoczi wrote: On Wed, Apr 27, 2011 at 4:05 AM, Brad Campbell wrote: I see there is a bug raised about the behaviour of qemu-img when used to convert using an output backing file. It

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Kevin Wolf
Am 27.04.2011 10:56, schrieb Brad Campbell: > On 27/04/11 16:10, Stefan Hajnoczi wrote: >> On Wed, Apr 27, 2011 at 4:05 AM, Brad Campbell >> wrote: >>> I see there is a bug raised about the behaviour of qemu-img when used to >>> convert using an output backing file. It allocates every sector whe

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Brad Campbell
On 27/04/11 16:10, Stefan Hajnoczi wrote: On Wed, Apr 27, 2011 at 4:05 AM, Brad Campbell wrote: I see there is a bug raised about the behaviour of qemu-img when used to convert using an output backing file. It allocates every sector whether or not it already exists in the output backing file

Re: [Qemu-devel] Qemu-img convert with -B

2011-04-27 Thread Stefan Hajnoczi
On Wed, Apr 27, 2011 at 4:05 AM, Brad Campbell wrote: > I see there is a bug raised about the behaviour of qemu-img when used to > convert using an output backing file. It allocates every sector whether or > not it already exists in the output backing file. Please post the link to the bug repor