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Message-Id: <29F21EA3-D1F0-4A32-B206-4CCCA9DCC233@patpro.net>
Date: Fri, 3 Feb 2017 07:26:29 +0100
From: Patrick Proniewski <patpro@...pro.net>
To: john-users@...ts.openwall.com
Subject: Re: to Single or not to Single
Alexander,
On 02 févr. 2017, at 22:19, Solar Designer wrote:
> On Thu, Feb 02, 2017 at 09:42:52PM +0100, Patrick Proniewski wrote:
>> After looking closely at the cracking session, I've determined that mode single attacks hashes in the same order that they appear in the file. So I have no explanation for the performance decrease. I made a graph for the first hour. It shows the very fast start, an impressive slowdown and a progressive slowdown during the full duration <https://www.patpro.net/~patpro/single-perf-decrease.png>.
>
> You need to tell us what that graph shows. Right now, it's just
> numbers. It could be g/s, p/s, c/s, C/s, or something entirely
> different. Which is it?
Oops. forgot to write a title on the graph. It's the number of "Cracked" per minute, extracted from the log file.
> It would be of more help (for the community to
> help you) if you copy-pasted a few status lines in here, e.g. at 1
> minute vs. 10 minutes vs. 1 hour,
I haven't collected these info. Currently after more than a day the status line looks like this:
2799705g 1:08:45:08 50.00% (ETA: 2017-02-04 15:31) 23.74g/s 392.6p/s 392.6c/s 392.6C/s erikita222
For the next file I'll try and get status line at different time. (the 50.00% is totally bogus, it's displayed from the start to the end)
> along with their preceding Loaded and
> Remaining lines.
How do I get those numbers?
> Your use of single mode sounds appropriate for what you're doing.
> To reduce its memory needs, try "--save-memory=2".
I'll give it a try. For now, I've split the huge file and I reclaim memory by stoping/restoring john every hour (yielding to this result <https://www.patpro.net/~patpro/john-memory-day.png>).
patpro
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