KV API ... Worker Worke r Worke r Spark Driver ... Spark SQL Spark Cluster DistSQL API P D P D P D PD Cluster Pum p Pum p Pum p Draine r TiDB Binlog DM Worker DM Worker Data Migratio n DM Master selector: labelSelectors: "app.kubernetes.io/component": "tikv" direction: to target: selector: labelSelectors: "app.kubernetes.io/component": "tikv" mode: one duration: "10s" scheduler: cron: "@every 15s"