From 12c onwards, Data Guard maximum availability supports the use of the noaffirm redo transport parameter. It enables Maximum Availability protection mode at larger distances with less performance impact then before. In “LogXptMode=FASTSYNC” mode, standby database returns receipt acknowledgment to its primary database as soon as redo is received in memory. The standby database does not wait for the Remote File Server (RFS) to write to a standby redo log file.
This is how FastSync set up: Continue reading → DataGuard 12.1 – FastSync and FarSync