Date: Tue, 15 Sep 2015 18:24:40 +0300 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: Judy array On Tue, Sep 15, 2015 at 09:53:52AM +0200, magnum wrote: > On 2015-09-15 09:29, Frank Dittrich wrote: > >Even with fast salted hashes, it is a problem when you have may be 4 > >instances of john running, each with about 2 million hashes, and > >cracking many passwords. > > You are using the default SALT_HASH_LOG of 12, right? You load a > thousand times more salts than that number is really good for. Please > try bumping it to 22 for the case of 2 million hashes. This will speed > up things significantly, not just pot sync. > > In fact we might want to bump that default a bit (at least in Jumbo). I > think we can't make it variable, that would hurt performance. We should do something about SALT_HASH_LOG next, yes. IIRC, the reason why I kept it at 12 was specifically not to waste any memory when cracking descrypt hashes. Perhaps we need to use a higher default now. Alexander
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