Re: [Qemu-devel] [PATCH V20 0/7] add-cow file format

2016-02-23 Thread Eric Blake
Reviving an old thread for discussion purposes: On 08/25/2013 10:06 AM, Dong Xu Wang wrote: > It will introduce a new file format: add-cow. > > The add-cow file format makes it possible to perform copy-on-write on top of > a raw disk image. When we know that no backing file clusters remain visib

[Qemu-devel] [PATCH V20 0/7] add-cow file format

2013-08-25 Thread Dong Xu Wang
It will introduce a new file format: add-cow. The add-cow file format makes it possible to perform copy-on-write on top of a raw disk image. When we know that no backing file clusters remain visible (e.g. we have streamed the entire image and copied all data from the backing file), then it is pos