About slave_compressed_protocol in Mysql replication

Hi,

Today I read about slave_compressed_protocol, because I need to waste more bandwidth, but I have some questions that I can't find in the documentation:

- I have to put slave_compressed_protocol=1 in server and slave or only in slaves?
- How can I check it's working the compression?
- My server is 4.0.27, some slaves 4.0.27 and other 4.1.22, is the slave compatible with the mix off all this versions?

Thanks for all!

 

As far as I understand from http://dev.mysql.com/doc/refman/5.0/en/replication-options.html , it must be set for both the master and the slave.

I think you can use

Code:

mysqladmin variables

or

Code:

mysqladmin extended-status