The concept of delayed replicated slave is nothing new - Oracle
(TM) for example had it for years with the Data Guard. So what is
it in the delaying the replicated database slave, how to use it
and how to implement it for MySQL - will discuss those topics in
Most of the replicated MySQL configurations are - one master and several replicated slaves, for the sake of simplicity I'm not going to get into the discussion on shards etc... And in most cases the struggle is to keep the replication up to date. But there are scenarios when delaying the replicated slave is actually beneficial.