Kafka replicira particije preko više brokera za trajnost i dostupnost — svaka particija ima voditelja i pratitelje replika. Ako broker padne, pratilac preuzima ulogu. Razumijevanje replikacije ključno je za Kafkinu toleranciju na greške.
Kako replikacija funkcionira
Each PARTITION is replicated across multiple brokers (REPLICATION FACTOR copies, e.g. 3):
→ LEADER replica → handles all reads and writes for the partition
→ FOLLOWER replicas → copy (replicate) the leader's data, staying in sync
→ producers/consumers interact with the LEADER; followers are backups
→ if the leader's broker FAILS → a follower is promoted to leader (failover) → no data loss,
continued availability
