Any concept.
clear in 60 seconds.

Database replication helps keep data available and allows systems to handle more read requests.

Database replication enhances data availability and read performance but has challenges like replication lag.

Log replication ensures data consistency by requiring majority acknowledgment before committing changes.

Synchronous replication waits for confirmation from replicas, while asynchronous allows faster writes without waiting.

Read replicas allow databases to handle more read requests by distributing them across multiple copies.

matchIndex tracks what each follower has, while commitIndex shows what is committed.

Elasticsearch CCR allows real-time data replication for faster disaster recovery.

Raft consensus helps distributed systems elect leaders and replicate logs reliably.