Thank you for your reply :-)
> What does replication have to do with it?
I wonder whether mysql will copy its binlog from memory( if it exists
) then send to slave. I haven't refer to the source codes yet...
> Slave's binlog? The slave's binlog is not tied to the master's
> binlog. I am not sure you understand clearly how replication works.
Yes. I am confused by binlog & RELAY log. Given the data which is
replicated only, will the content( at least SQL ) of the two logs be
> Again I'm not sure what you are really asking. You might be looking
> for the Google synchronous replication patches. Do a web search for
> those and read up on what they offer.
It helps :-)