2011-10-20, 13:21(+02), Gonzalo Marcote Peña: > I have one guest that I created with virt-install comand option 'sparse=true'. > As i want to use now this guest for I/O tasks (DDBB) and i want to > improve performance, I want to convert the disk.img from sparse to no > sparse (obviusly without format it). > How can I do this task without loosinf the disk image data?. > Thank you. [...]
You'll have to make a separate copy anyway as your aim is to have all the data contiguous on disk. If it's a raw image. cat < old.img > new.img cp --sparse=never old.img new.img Or you can use qemu-img convert. Or you could use a LVM volume instead of file. This way, you have more control on which sectors are allocated and can force them to be contiguous. On extent based FS (ext4, btrfs...), there might be a way to guarantee as few extents as possible, but I don't know it. -- Stephane -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
