System and method for persistence and replication of changes to a data store

A database replication system comprising:

• a plurality of data nodes, each data node in the plurality of data nodes comprising a processor and a memory, and the plurality of data nodes comprising:
• a plurality of replica data nodes, each replica data node of the plurality of replica data nodes comprising a replica database;
• a first master data node comprising a master database, a page buffer, a transaction log buffer and a master node transaction log for recording changes to the master database, and configured with an acknowledgement requirement that comprises an acknowledgement threshold that is less than a total number of replica data nodes in the plurality of replica data nodes, the first master data node comprising computer executable instructions executable to:
• buffer a page in the page buffer;
• store a transaction log record for a transaction in the transaction log buffer, the transaction log record including update data that describes a change to the page;
• responsive to a defined synchronization call, force the transaction log record from the transaction log buffer to the master node transaction log;
• based on successfully forcing the transaction log record to the master node transaction log, send to the plurality of replica data nodes the transaction log record, wherein the transaction log record includes an update to data in the master database that has not been committed to the master database;
• receive acknowledgements of the transaction log record;
• and
• based on a determination that the received acknowledgements of the transaction log record meet the acknowledgement requirement, set the transaction log record as a master node last acknowledged transaction log record in the master node transaction log.