Types of Replication Modes in SAP

 

SAP is among the leading software development companies in the world, specializing in the management of business processes and developing solutions that facilitate robust data processing and flow of information. System replication is copying the SAP HANA database to another location that might be external or within same environment. The SAP database can consistently synchronize with the primary system during replication. Hence, when selecting a target system to replicate the database, a specific replication mode has to be decided first.



SAP data replication can be carried out in four distinct modes.

·        Synchronous In-Memory Mode: This is the default mode of SAP data replication. Once the log is transmitted, the primary node or the source database waits for a confirmation message from the target node or secondary database. Until the message is received the primary node or system does not finalize the transaction.

·        Synchronous Mode: Here, the primary node waits and stops the transaction until it receives an acknowledgment from the secondary node. The acknowledgment is an indication that the data log and persistence of the log volumes on its disk has been accepted.

·        Synchronous Full Sync Mode: In SAP data replication, this mode ensures complete data protection. There is zero-loss of data because the process blocks the transaction on the primary mode till the secondary node completes the replication.

·        Asynchronous Mode: This is when the primary and secondary nodes work asynchronously. The primary mode does not stop its transactions until the secondary node sends confirmation but instead, commits a transaction that has been written on the log file in the primary system and sent to the secondary node.

The mode used by organizations for SAP data replication depends on their specific requirements.

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