On Thu, 2009-01-22 at 13:14 +0000, Pádraig Brady wrote: > Jim Meyering wrote: > > Sure. > > Too many people waste too much time with the existing defaults. > > Pushing the attached soon so.
A consequence of this change -- right now -- is that all 3 passes will be random. I am not sure if this was the intended result or not. The current pass select logic forces the first and last passes to be random, and inserts a random pass (if there is not a big enough selection) in the middle. End result is all passes are random. But, indeed (and as far as a single run can be of any value), the elapsed time did go significantly down. Example runs: hg...@xango2:/tmp $ shred --version shred (GNU coreutils) 7.0.147-83ae1 Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by Colin Plumb. hg...@xango2:/tmp $ time shred --verbose -n 25 test.data shred: test.data: pass 1/25 (random)... shred: test.data: pass 2/25 (000000)... shred: test.data: pass 3/25 (492492)... shred: test.data: pass 4/25 (111111)... shred: test.data: pass 5/25 (555555)... shred: test.data: pass 6/25 (777777)... shred: test.data: pass 7/25 (249249)... shred: test.data: pass 8/25 (eeeeee)... shred: test.data: pass 9/25 (db6db6)... shred: test.data: pass 10/25 (aaaaaa)... shred: test.data: pass 11/25 (b6db6d)... shred: test.data: pass 12/25 (ffffff)... shred: test.data: pass 13/25 (random)... shred: test.data: pass 14/25 (bbbbbb)... shred: test.data: pass 15/25 (6db6db)... shred: test.data: pass 16/25 (cccccc)... shred: test.data: pass 17/25 (dddddd)... shred: test.data: pass 18/25 (999999)... shred: test.data: pass 19/25 (444444)... shred: test.data: pass 20/25 (666666)... shred: test.data: pass 21/25 (924924)... shred: test.data: pass 22/25 (888888)... shred: test.data: pass 23/25 (333333)... shred: test.data: pass 24/25 (222222)... shred: test.data: pass 25/25 (random)... real 0m22.306s user 0m0.056s sys 0m11.601s hg...@xango2:/tmp $ time shred --verbose test.data shred: test.data: pass 1/3 (random)... shred: test.data: pass 2/3 (random)... shred: test.data: pass 3/3 (random)... real 0m8.985s user 0m0.020s sys 0m8.185s hg...@xango2:/tmp $ ls -l test.data -rw-r--r-- 1 hggdh hggdh 11280384 2009-01-23 14:32 test.data hg...@xango2:/tmp $ Regards, ..hggdh..
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