On Fri, 20 Sep 2013, Janne Johansson wrote: > 2013/9/20 <hru...@gmail.com> > > > Janne Johansson <icepic...@gmail.com> wrote: > > > > > In practical terms, if I rsync a file from X to Y, and rsync says it is > > > complete, how to verify the 4G files actually are equal? > > > Given that rsync only knows that hash(A) was equal to hash(B) at the end, > > > what do you propose to use for verification? > > > > In practical terms, it is indeed very unprobable that a file that > > passed the last check is not the right one. > > > > Yes, but how to verify it?
Call your favorite psychic hotline and ask to speak to the psychic cryptologist on duty. In rational terms, the costs of verifying every file are likely to be far greater than the costs of dealing with the results if they aren't the same. If it is a source code file, any error would likely show up quite quickly. I suspect that a number of errors would result in files that were incapable of being compiled. Eric
