On 07/11/2012 10:47 AM, Joerg Schilling wrote: > Sa??o Kiselkov <skiselkov...@gmail.com> wrote: > >> write in case verify finds the blocks are different). With hashes, you >> can leave verify off, since hashes are extremely unlikely (~10^-77) to >> produce collisions. > > This is how a lottery works. the chance is low but some people still win. > > q~A
You do realize that the age of the universe is only on the order of around 10^18 seconds, do you? Even if you had a trillion CPUs each chugging along at 3.0 GHz for all this time, the number of processor cycles you will have executed cumulatively is only on the order 10^40, still 37 orders of magnitude lower than the chance for a random hash collision. Cheers, -- Saso _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
