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VeloDB Cloud 26.x·Apache Doris 4.x (up to 4.0 supported)·"Since X.Y" tags refer to Apache Doris versionsVersion mapping

DROP FOLLOWER

Description​

This statement deletes the node with the FOLLOWER role of FRONTEND. (For administrators only!)

Syntax​

ALTER SYSTEM DROP FOLLOWER "<follower_host>:<edit_log_port>"

Required Parameters​

1. <follower_host>

Can be the hostname or IP address of the FE node

2. <edit_log_port>

bdbje communication port of FE node, the default is 9010

Access Control Requirements​

The user executing this SQL command must have at least the following permissions:

PrivilegeObjectNotes
NODE_PRIV

Usage Notes​

  1. Before deleting a FOLLOWER node, make sure that the node that needs to be taken offline is not a Master node.
  2. Before deleting a FOLLOWER node, ensure that the number of FOLLOWER nodes in the cluster is an odd number after they go offline.
  3. After deleting the FOLLOWER node, use the SHOW FRONTENDS command to verify that they were successfully deleted.

Examples​

  1. Delete a FOLLOWER node

    ALTER SYSTEM DROP FOLLOWER "host_ip:9010"

    This command deletes a FOLLOWER node in the cluster (IP host_ip, port 9010)