KIP-61 — Add a log retention parameter for maximum disk space usage percentage

Discussion Broker

KIP-61 proposes a `log.retention.disk.usage.percent` broker config that triggers deletion of the globally oldest segments across all topics once a volume's disk utilization exceeds the configured percentage. The existing time- and size-based retention policies operate per-topic and cannot prevent disk exhaustion when topic creation and volume are unpredictable.

Details