6 terms
Asynchronous replication copies committed database changes to replicas after the primary confirms the commit, giving fast writes but risking some data loss.
A database cluster is a group of database servers that share or replicate data and act as one service for availability, scale or both.
Primary-replica is a database replication model in which one primary server accepts all writes and streams its changes to read-only replica copies.
A read replica is a continuously updated copy of a primary database that serves read-only queries, offloading reporting and read traffic from the primary.
Replication lag is the delay between a change committing on a primary database and the same change becoming visible on a replica that copies it.
Synchronous replication is a database replication mode in which a commit succeeds only after one or more replicas confirm they have received the change.