Configuring Persistent Configuration Data

About this task

If you have MapR-DB in your cluster, you can use MapR-DB for persistent configuration storage. Using MapR-DB to store persistent configuration data can prevent memory strain on ZooKeeper in clusters running heavy workloads.To change the persistent storage mode to MapR-DB, add or modify the sys.store.provider block in <drill_installation_directory>/conf/drill-override.conf on each Drill node and then restart the Drillbit service.

For example:

sys.store.provider: {
class: "org.apache.drill.exec.store.hbase.config.HBasePStoreProvider",
hbase: {
  table : "/tables/drill_store"
    }
},

Issue the following command to restart the Drillbit on all Drill nodes:

maprcli node services -name drill-bits -action restart -nodes <node IP addresses separated by a space>