CapacityScheduler

Bilibili Tech

Mar 25, 2022 · Big Data

Bilibili's YARN Scheduling Optimization Practice: From Heartbeat-Driven to Global Scheduling

Bilibili transformed its YARN CapacityScheduler from a heartbeat‑driven design to a multi‑threaded global scheduler by separating lock handling, adopting Weighted Round‑Robin with DRF, adding batch node selection, fixing proposal inconsistencies, tuning GC and logging, and thereby reduced application allocation time by about 38 % on clusters of up to 8,000 nodes.