append I/O test
Posted by Anonymous on Fri 25th Apr 2025 20:17
raw | new post

#!/usr/bin/ksh93

#
# append I/O test
#

rm -f 'appendtest1.tmp1' 'appendtest1.tmp2'

typeset l='############################################'
l+="$l"
l+="$l"
l+="$l"
l+="$l"
l+="$l"
l+="$l"
l+="$l"
l+="$l"
l+="$l"

redirect {n}>>'appendtest1.tmp2'
integer i
for ((i=6000 ; i > 0 ; i-- )) ; do
    (ulimit -c 0 ; print -f '%d\t%s\n' "$i" "${l:0:$i%8192}" >>'appendtest1.tmp1')
done
ls -l 'appendtest1.tmp1'

for ((i=6000 ; i > 0 ; i-- )) ; do
    print -u$n -f '%d\t%s\n' "$i" "${l:0:$i%8192}"
done
ls -l 'appendtest1.tmp2'

sync


diff -u 'appendtest1.tmp1' 'appendtest1.tmp2'
#