SYNC (the transaction will be written and synchronized to the disk; highest durability) WRITE_NO_SYNC (the transaction will be written only; the synchronization will be performed later) NO_SYNC (write later; the transaction will be written and synchronized later; lowest durability)

SYNC (the transaction will be written and synchronized to the disk; highest durability) WRITE_NO_SYNC (the transaction will be written only; the synchronization will be performed later) NO_SYNC (write later; the transaction will be written and synchronized later; lowest durability)