Date: Fri, 4 Nov 2016 15:48:42 +0100 From: matlink <matlink@...link.fr> To: john-users@...ts.openwall.com Subject: Re: John does not fork as many times as I want Le 04/11/2016 à 15:40, Solar Designer a écrit : > On Fri, Nov 04, 2016 at 03:19:32PM +0100, matlink wrote: >> Okay then there is less memory used when cracking hard password >> (allowing using more forks) than when freshly starting to crack the >> hashes? > Sort of, but not exactly. Rather, there's slower growth in combined > memory needs (which increase through reduction of sharing) by the forked > processes when the successful guesses are not as frequent. > >> Is that linked to the "1/3" I can see on the john status? Step >> 3/3 requires less memory when forking than step 1/3? > No, there's no direct relationship to that. It's just a matter of > getting the weakest passwords out first, at which point you restart and > can run more processes due to them staying more similar to each other > for longer. If at some point they become dissimilar enough to run out > of memory again, you can interrupt and restore that session (without > losing any work already done). Understood. I suppose that using "john --restore=mysession" is faster than running again the above command having "--session=mysession", even if that command specifies a potfile ? > > I also recommend the "--nolog --save-memory=1" options. (Going higher > than "1" for "--save-memory" will hurt performance, so don't do that.) > > Alexander -- Matlink - Sysadmin matlink.fr Sortez couverts, chiffrez vos mails : https://café-vie-privée.fr/ XMPP/Jabber : matlink@...link.fr Clé publique PGP : 0x186BB3CA Empreinte Off-the-record : 572174BF 6983EA74 91417CA7 705ED899 DE9D05B2
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