how to delete files on two remote servers simultaneously?

Shell Programming and Scripting
1

dear all,

i'm preparing a script which can do these actions :

  1. stop remove server's certain service
  2. clean the files on remote servers simultaneously (because lots of files need to be deleted)
  3. after files/logs are removed, restart the service again

i'm stuck on how to clean remote servers's files at the same time to save time.

this is the code i have right now :
(by the way, i have setup the auto ssh-login mechanism, thus, passwd is not necessary when running ssh command)

MAILERS=(192.168.1.1 192.168.1.2)

# stop service
for ((index=0; index<${#MAILERS[@]}; index++)); do
   ssh ${MAILERS[$index]} "service my_service stop"
done

# delete those files matching $1 variable
for ((index=0; index<${#MAILERS[@]}; index++)); do
   ssh ${MAILERS[$index]} "find /path -name '*$1*' -exec rm {} \;"
done

# start the service again
for ((index=0; index<${#MAILERS[@]}; index++)); do
   ssh ${MAILERS[$index]} "service my_service start"
done

to be more specific, how to run the "find-exec-rm" command on both servers simultaneously?

just put the & in end of it is not what i want...

any advice on this? Thanks.

2

And why is not & a sufficient solution?

Your ONLY choice is to create two seprate processes on the remote boxes, either serially or sequentially.

3

cause lots of files on two servers need to be deleted before service start....

if putting the 'find-exec-rm' command into background, then i can't control when it's finished..

4

Yes, you can.

# delete those files matching $1 variable
for ((index=0; index<${#MAILERS[@]}; index++)); do
   ssh ${MAILERS[$index]} "find /path -name '*$1*' -exec rm {} \; >/dev/null 2&>1"  &
done
wait

The shell will wait for all of the ssh invocations before to complete continuing to the next step.

1 Like
5

if you administer multiple servers search:

clusterit
and cssh

They can seriously cut down your workload.