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

2-Phase Commit helps maintain data consistency in transactions across multiple databases.

Kafka's commitSync waits for confirmation, while commitAsync continues immediately.

SLIs measure service performance, SLOs set reliability targets, and SLAs are customer agreements.

Dependency failures can disrupt applications, but resilience patterns can help manage them.

Kafka uses different strategies to assign partitions to consumers in a group efficiently.

Raft's safety rules guarantee that committed entries are preserved even after leader failures.

Older offsets can overwrite newer ones in Kafka if not handled properly.