shell script tip: wait

Shell scripting tip: wait

I have a task to clone two databases. I need to scp data files with 5 parallel sessions. This can be accomplished by using 'wait'.

The script looks like:

#!/bin/ksh

echo " tbs 1 starts  `date` "
scp /v03/oradata/mydb/tbs34.dbf   myserver01:/v03/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs05.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs06.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs07.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs08.dbf   myserver01:/v04/oradata/mydb/  &                
wait

echo " tbs 2 starts  `date` "
scp /v04/oradata/mydb/tbs09.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs10.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs11.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs12.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs04.dbf   myserver01:/v04/oradata/mydb/  &                
wait

echo " tbs 3 starts  `date` "
scp /v04/oradata/mydb/tbs17.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs26.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs27.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs28.dbf   myserver01:/v04/oradata/mydb/  &                
scp /v04/oradata/mydb/tbs16.dbf   myserver01:/v04/oradata/mydb/  &                
wait


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In this script, five processes will be executed at background parallelly. The next five processes will start until all the previous background processes finish.