Shell script multi process concurrent writing method example (high level cultivation)

There are many real work scenarios to achieve rapid processing , And use concurrent execution . Other languages are very easy to implement concurrency .

that shell Script most linux The most friendly scripting language above can achieve concurrency ?

The answer is yes !~

So, BOGO, here is an example to share with you !~

#!/bin/bash
# Concurrency number 
pnum=6
# The function you want to execute 
task () {
echo "$u start"
sleep 5
echo "$u done"
}

FifoFile="$$.fifo"
mkfifo $FifoFile
exec 6<>$FifoFile
rm $FifoFile

for ((i=0;i<=$pnum;i++));do echo;done >&6
# perform 20 Time 
for u in `seq 1 20`
do
read -u6
{
# Call function 
task
# Print result log of concurrent execution function 
[ $? -eq 0 ] && echo "${u}  Success " || echo "${u}  Secondary failure "
echo >&6
} &
done
wait
exec 6>&-

Copy

Apply the above example to realize concurrent processing !~