Rsync shell script to continuously sync local directory to remote server

I need to set up a shell script on Mac OS X Mountain Lion to sync a local directory to a remote directory (web server) using either an SSH connection (tunnel) or SFTP and have it run continuously every 30 seconds.

I also need to exclude certain files or folders from being synced.

The syncing would be unidirectional (mac -> webserver).

The basic parameters I need to have implemented are as follows:

Local path: /Volumes/path/to/local/directory
Remote server:
username: someUser
password: somePassword
Remote path: /path/from/server/root/to/htdocs
Files to exclude: '.ht*', '*.sublime-*'
Folders to exclude: 'cache','administrator/cache'

I would also need help writing the crontask and adding it to my system to execute automatically.

Any help would be greatly appreciated.

Every 30 seconds…why?! o.O
Also…do you have a question or just making a statement?

Yes…my question was how do I set that up. I got the answer…but now I am facing a different issue.

The command I am issuing is:

rsync -avz -e ssh --exclude '*.ht*' --exclude '*.jpa*' --exclude '*.sublime-*' --exclude 'cache/' --exclude 'administrator/cache' /Volumes/Clients/htdocs/sites/domains/clients/sosd2

It isn’t doing exactly what I need.

What is happening is that the entire remote directory ‘sosdivorce’ is being synced into the local directory ‘sosd2’ as a subdirectory of the local.

What I need to have happen is that the contents of the remote directory ‘sosdivorce’ sync with the contents of the local directory ‘sosd2’.

How do I modify the command above to do that?

Add a trailing slash to the source path

Also, you can use the --daemon switch to make rsync run as a daemon which is more suitable than running it every 30 seconds. Especially since cron can’t handle every 30 seconds.