The file fack.0-1.dif is an ASCII text file of 54,853 lines with 4 columns of numeric data. I noticed very slow performance when trying to sort on a RH9.0 system:
projects/nettraf/sriram/traces0 ==> time sort -n -k2 < fack.0-1.dif > junk.srt
real 7m42.905s user 7m42.650s sys 0m0.090s
So I copied /bin/sort from a RH7.2 system and renamed it fsort and got a reduction in elapsed time from almost 8 minutes to 1/2 second!!! Note that the output files are IDENTICAL.
projects/nettraf/sriram/traces0 ==> time fsort -n -k2 < fack.0-1.dif > junk2.srt
real 0m0.511s user 0m0.390s sys 0m0.020s projects/nettraf/sriram/traces0 ==> diff junk2.srt junk.srt projects/nettraf/sriram/traces0 ==> wc -l fack.0-1.dif 54853 fack.0-1.dif projects/nettraf/sriram/traces0 ==> ls -l fack.0-1.dif -rw------- 1 westall westall 2762463 Oct 5 18:26 fack.0-1.dif projects/nettraf/sriram/traces0 ==>
This behavior is infinitely repeatable and applies to ALL RH 9.0 systems I've tried but NO RH 7.x systems.
Any ideas whats up with this????
thanks, mike
James M. Westall Professor of Computer Science Clemson University Clemson SC 29634
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