On 07/11/2012 04:36 PM, Justin Stringfellow wrote: > > >> Since there is a finite number of bit patterns per block, have you tried to >> just calculate the SHA-256 or SHA-512 for every possible bit pattern to see >> if there is ever a collision? If you found an algorithm that produced no >> collisions for any possible block bit pattern, wouldn't that be the win? > > Perhaps I've missed something, but if there was *never* a collision, you'd > have stumbled across a rather impressive lossless compression algorithm. I'm > pretty sure there's some Big Mathematical Rules (Shannon?) that mean this > cannot be.
Do you realize how big your lookup dictionary would have to be? -- Saso _______________________________________________ zfs-discuss mailing list email@example.com http://mail.opensolaris.org/mailman/listinfo/zfs-discuss