Hello, We are exploring using Kafka for our application. Our requirement is that once we write some messages to Kafka, it should be guaranteed that the messages are persisted to disk. We found this <https://www.quora.com/Does-Kafka-sync-data-to-disk-asynchronously-like-Redis-does> article which says that a Kafka broker acknowledges a record after it has written the record to the buffer of the I/O device; it does not issue an explicit fsync operation nor does it wait for the OS to confirm that the data has been written. Is this statement true for the current implementation? If so, is there any way in which we can ensure fsync is called before acknowledgement of messages? Any help would be appreciated.
-- Thanks & Regards Kunal Goyal
