Date: Tue, 16 Jun 2009 09:28:16 -0600 From: RB <aoz.syn@...il.com> To: john-users@...ts.openwall.com Subject: MPI John (was: Re: GI John) On Tue, Jun 16, 2009 at 08:25, Rich Rumble<richrumble@...il.com> wrote: > I found an article recently detailing how to use MPI and JTR. I hope it may > help others in their efforts to distribute JTR to many cores and computers. > http://www.tmto.org/docs/MPIandPasswordCracking.pdf It's important to note that current MPI implementations of JtR are only effective in incremental mode. Curious that he uses Gentoo, but doesn't use the built-in package manager that not only handles the OpenMPI-1.3.2 install, but also applies a more recent patchset to JtR with the 'mpi' USE flag. You can lead a horse to water... Is anyone interested in a 9th revision of the MPI patch? I have it pretty much done, it just requires a little cleanup before I release it. There was zero response on the john-mpi list, so I presumed all interest was dead. The mpi9 patch is a descendant of my 'mpi8-small' patch that stripped out all the extra patches and is specifically designed to cleanly cooperate with the latest (all-5) jumbo patch. It has been stripped down even further and specifically modified to be as non-intrusive to the original codebase as possible, to the point of even re-writing portions. Other than minor compatibility fixes, I don't foresee any further major updates to this lineage of parallelization. All told, after all the hype I'm actually a little disappointed in how little the MPI patches actually do. When stripped down to brass tacks, the currently maintained lineage (from Ryan Lim through bindshell.net) just wraps the JtR main loop in some MPI sugar, then when in incremental mode splits the cracking space up evenly among the participating nodes. No synchronization, no real distribution of the processing; in fact, it's not terribly different from Solar's current parallelization suggestion of splitting the workload by namespace lengths. So: is there enough interest in the 9th (and probably last major) revision for me to go clean up my comments and publish it? -- To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply to the automated confirmation request that will be sent to you.
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.