Replication setup hep

[Pothanaboyina Trimurthy]

Hi everyone
                 i have 4 mysql servers out of those one server will
be online always and the remaining will be offline and online. the
operations takes place at the offline servers i want to replicate the
data from the offline servers to the online server. for this can any
one help me which kind of replication suits for this kind of
situation.

thanks in advance

-- 
3murthy