Rsync via cron

UNIX for Advanced & Expert Users
1

Hi,

I am running a rsync via cron job.

Its running fine and is scheduled to 9:00 AM everyday.

Sometimes it runs for more than 24 hours, such that the next days cron also fires.

Now how will the sync happen as the <sync file> that both crons have created might conflict.

Thanks

2 
* 9 * * * [ ! -f /tmp/lockFile ] && { touch /tmp/lockRsync ; rsync whatever; rm /tmp/lockRsync }
3

Thanks,

But i know how to get around.

Was just curious how the crons will behave.

4

Means rsync is going to copy one file, but sees that's already there.

What will it do now, overwrite or leave it and why? :slight_smile:

5

Are you asking about rsync's behaviour or cron's? The cronjob is written to first check if a lock file is present and if not, create the lock and run the job. It then removes the lock file before exiting. I have never used rsync, but I believe you can specify how rsync should behave under the conditions that you have specified.

6

Rsync ...

Cron is just a way to start and it can be forgot now.