Date: Sat, 13 Mar 2010 09:47:27 +0100 From: "Magnum, P.I." <rawsmooth@...dband.net> To: john-users@...ts.openwall.com Subject: Re: problem with initializing mpirun extended I wrote: > websiteaccess@...il.com wrote: >> Hi >> >> I use a freshly JTR 1.7.5 mpi-10 extended compiled, with jumbo patch >> 2. I built my own rules (thousand rules) > > > The mpi10 patch only supports incremental mode. Um, sorry. By "mpi-10 extended" you meant the fullMPI-3 patch? Let us call the "old" incremental-only patch "mpi10" and my recent patches the "fullmpi" ones, to avoid confusion. My current patch should be called "fullmpi-3". >> 0 0:00:00:00 - loading wordfile >> baseavecreglemultilanguesESSENTIEL_UTF8.txt into memory (4156374 bytes, >> max_size=5000000) >> 0 0:00:00:00 - wordfile had 536867 lines and required 2147468 bytes for >> index. >> 0 0:00:00:00 - 748892 preprocessed word mangling rules >> >> After 10 hours, JTR is still working..... >> >> 0 0:10:35:50 - Rule #465576: '>2 <9 :: Az,010449,' accepted as >> '>2<9Az,010449,' >> 0 0:10:35:50 Session aborted >> >> Before, I used JTR without MPI-10, I did not had this problem (same >> dictionary, same rules). It took some seconds (generally instant) >> before beginning cracking. >> >> PS: each time I run JTR MPi-10 (-w:dict) I have to wait :( I'm not sure I follow. After 10 hours, it has processed almost half a million rules. What do you mean "before beginning cracking" ? There is one thing though, maybe it should be clearly stated in the docs. The MPI patch seems to make the buffering of logging more noticable. If you start a job in background, the check the logs, it may very well stop after the "748892 preprocessed word mangling rules" line you mention for a very long time. But if you issue a kill -HUP to that process, it will flush its log buffer and you'll see it is in fact working. I use to do like this: $ skill -HUP -c john ; sleep 3 ; mpiexec -np <nodes> ./john -status ...where the <nodes> figure must match the job's. After that, logfile buffers will be flushed too (if -HUP won't work, try -USR1) I have considered flushing more often but I'm not sure how/when to do it without risking introducing performance hits. The current behaviour is as it comes from mpi10.
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