Lakehouse Research Base

Apr 6, 2025 · Databases

Accelerating StarRocks Node Decommissioning via tablet_sched_slot_num_per_path Tuning

The author decommissioned three StarRocks nodes with over 1M tablets each; default replica migration moved only 200k replicas in 24 hours, so they increased tablet_sched_slot_num_per_path from 2 to 32 per disk during off-peak, achieving 800k+ replicas migrated per node in 8 hours while monitoring disk I/O.