Shell Programming and Scripting

FL=($(ls)); 
for ((i=0;i<=${#FL[@]};i++)); do 
for j in ${FL[@]:$i:10};
do 
$batch  ${j}  ${j}.txt
done; 
echo "Pausing for next iteration";
echo "------------------------------------------------------------------------------------"; 
((i+=10)); 
done

for j in ${FL[@]:$i:10};
do 
$batch -in  ${j} -out  ${j}.txt &
done;

$batch -in  ${j} -out  ${j}.txt && $batch -in  ${j} -out  ${j}.txt && $batch -in  ${j} -out  ${j}.txt && $batch -in  ${j} -out  ${j}.txt && $batch -in  ${j} -out  ${j}.txt && $batch -in  ${j} -out  ${j}.txt

00:00:00 Start job 1
00:00:00 Start job 2
00:00:00 Start job 3
00:00:00 Start job 4
00:00:00 Start job 5
00:00:00 Start job 6
00:00:00 Start job 7
00:00:00 Start job 8
00:00:00 Start job 9
00:00:00 Start job 10
00:00:01 Ended job 1
00:00:02 Ended job 2
00:00:03 Ended job 3
00:00:04 Ended job 4
00:00:05 Ended job 5
00:00:06 Ended job 6
00:00:07 Ended job 7
00:00:08 Ended job 8
00:00:09 Ended job 9
00:00:10 Ended job 10
00:00:10 Started job 11
00:00:10 Started job 12
00:00:10 Started job 13
:
:
etc.

00:00:00 Start job 1
00:00:00 Start job 2
00:00:00 Start job 3
00:00:00 Start job 4
00:00:00 Start job 5
00:00:00 Start job 6
00:00:00 Start job 7
00:00:00 Start job 8
00:00:00 Start job 9
00:00:00 Start job 10
00:00:01 Ended job 1
00:00:01 Started job 11
00:00:02 Ended job 2
00:00:02 Started job 12
00:00:03 Ended job 3
00:00:03 Started job 13
00:00:04 Ended job 4
00:00:04 Started job 14
:
:
etc.

for single_job in ${job_list}
do
   "${single_job}" &
   ((active_count=$active_count+1))
   if [ $active_count -ge 10 ]
   then
      wait                    # All background processes must end before we start the next block
      active_count=0  # Reset the counter
   fi
done

echo "Finished them in blocks or up to ten"

for single_job in ${job_list}
do
   active_jobs=$(ps -f|grep -c slee[p])            #  This is the important bit!
   if [ $active_count -ge 10 ]
   then
      echo "All running at full capacity"
      sleep 1    # Pick a suitable check frequency
   else
      "${single_job}" &
   fi
done

echo "Finished them with up-to-ten running"

for single_job in ${job_list}
do
   active_jobs=$(ps -f|grep -c slee[p])            #  This is the important bit!
   if [ $active_count -ge 10 ]
   then
      echo "All running at full capacity"
      sleep 1    # Pick a suitable check frequency
   else
      "${single_job}" &                 <----- Should I do the calculation on this point as well , how many jobs are running and how many to start ?
   fi
done

echo "Finished them with up-to-ten running"

CMD=(J L M)
batch=echo
for j in ${CMD[@]}
do
   echo $batch -in  ${j} -out  ${j}.txt
done | parallel -j 10 --load 80% --noswap '{}'