Bob Proulx put forth on 1/9/2011 3:12 PM: > GNU xargs has an extension to run jobs in parallel. This is already > installed on your system. (But won't work on other Unix systems.) > > for k in *.JPG; do echo $k; done | xargs -I{} -P4 echo convert {} -resize > 1024 {} > > Verify that does what you want and then remove the echo.
Thank you Bob. This is EXACTLY what I was looking for. It does exactly what I want, in the precise way I want. And it's such a simple modification of my original script, not requiring a big rewrite. Excellent. :) I'm using -P2 as the target system is an old dual proc server, two single core CPUs. I made three timed runs against 11 camera photo files, first using -P4, then -P2, then the original script. The two process run was 5 seconds faster and consuming half as much memory as the 4 processes run, and the -P2 overall run time was almost exactly half that of the original script. Very excellent indeed. Thanks again Bob. You rock. :) -- Stan -- 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/4d2a78d7.5000...@hardwarefreak.com