Here i am explaining different replication Modes between Sites in the HANA Replication setup. Synchronous (SYNC) : The secondary system sends an acknowledgment back to the primary system as soon as the data is received and persisted to the log volumes on disk. Asynchronous (ASYNC): Asynchronous replication, the primary does not wait until the secondary sends an acknowledgement. Synchronous in-memory (SYNCMEM):The secondary system sends an acknowledgment back to the primary system as soon as the data is received in memory. The disk I/O speed on the secondary system doesn’t influence the primary’s performance. Site Distance  Replication Mode  < 100 KM SYNC … Continue reading Replication Modes between Sites : HANA Replication