bash控制任務並發數指令碼

bash控制任務並發數指令碼 使用bash實現控制任務並發數的功能 01#!/bin/bash02#03 04CMDS[1]="echo $USER' 01 BEGIN' && sleep 6 && echo $USER' 01 END'"05CMDS[2]="echo $USER' 02 BEGIN' && sleep 3 && echo $USER' 02 END'"06CMDS[3]="echo $USER' 03 BEGIN' && sleep 7 && echo $USER' 03 END'"07CMDS[4]="echo $USER' 04 BEGIN' && sleep 4 && echo $USER' 04 END'"08CMDS[5]="echo $USER' 05 BEGIN' && sleep 2 && echo $USER' 05 END'"09CMDS[6]="echo $USER' 06 BEGIN' && sleep 5 && echo $USER' 06 END'"10 11N=${#CMDS[@]}12 13MAX=314PIDS=''15for I in $(seq $N)16do17    while [ 1 -gt 0 ]18    do19        C=020        pids=''21        for PID in $PIDS22        do23            ps $PID >/dev/null 2>/dev/null24            if [ $? -eq 0 ]25            then26                pids="$pids $PID"27                (( C = C + 1 ))28            fi29        done30        PIDS=$pids31 32        [ $C -lt $MAX ] && break33        sleep 134    done35 36    #echo $i ${CMDS[$i]}37    CMD=${CMDS[$I]}38    bash -c "$CMD" &39    PIDS="$PIDS $!"40done41 42wait