Hi, On Tue, 4 Jul 2006, Christian MICHON wrote:
> ok, I used "split -b 4k" on a 7716864 bytes qcow. > I used standard lzma compression and get 1884 7z-clusters > with a grand total of 3558617 bytes (indeed the gain is small). > > The standard zlib qcow gave 3704180 bytes... That is what I expected. > Does it make sense to have a cluster based compression ? > Indeed the actual compression is not so impressive then (zlib > or not zlib based). Absolutely! Remember, you want to emulate a _random_ access device here. And it is no good if you need 10 minutes just to access the last cluster of the emulated hard drive, especially if this is the only one you are interested in. Hth, Dscho _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
