On Sun, Jan 09, 2011 at 10:05:43AM -0600, Stan Hoeppner wrote: > I'm not very skilled at writing shell scripts. > > #! /bin/sh > for k in $(ls *.JPG); do convert $k -resize 1024 $k; done > > I use the above script to batch re-size digital camera photos after I > dump them to my web server. It takes a very long time with lots of new > photos as the server is fairly old, even though it is a 2-way SMP, > because the script only runs one convert process at a time serially, > only taking advantage of one CPU. The convert program is part of the > imagemagick toolkit. > > How can I best modify this script so that it splits the overall job in > half, running two simultaneous convert processes, one on each CPU? > Having such a script should cut the total run time in half, or nearly > so, which would really be great.
Not really 2 but ... Either use "make" to run controlled number of process or just do something along for k in $(ls *.JPG); do convert $k -resize 1024 $k >>log.txt 2>log2.txt &; done -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110114154648.ga16...@debian.org
