SLONIK DROP NODE(7)

NAME
DROP NODE - Remove the node from participating in the replication

SYNOPSIS
\FCDROP NODE (options);\F[]

DESCRIPTION
Drop a node. This command removes the specified node entirely from the replication systems configuration. If the replication daemon is still running on that node (and processing events), it will attempt to uninstall the replication system and terminate itself.

\FCID = ival \F[]
    Node ID of the node to remove. This may be represented either by a single node id or by a quoted comma separated list of nodes

\FCEVENT NODE = ival \F[]
    Node ID of the node to generate the event.

This uses “schemadocdropnode(p_no_ids integer[])” [not available as a man page].

When you invoke DROP NODE, one of the steps is to run UNINSTALL NODE.

EXAMPLE
\FC     DROP NODE ( ID = 2, EVENT NODE = 1 );
	 DROP NODE (ID='3,4,5', EVENT NODE=1);
    \F[]

LOCKING BEHAVIOUR
When dropping triggers off of application tables, this will require exclusive access to each replicated table on the node being discarded.

DANGEROUS/UNINTUITIVE BEHAVIOUR
If you are using connections that cache query plans (this is particularly common for Java application frameworks with connection pools), the connections may cache query plans that include the pre-DROP NODE state of things, and you will get error messages indicating missing OIDs [“[MISSING TEXT]” [not available as a man page]].

After dropping a node, you may also need to recycle connections in your application.

You cannot submit this to an EVENT NODE that is the number of the node being dropped; the request must go to some node that will remain in the cluster.

SLONIK EVENT CONFIRMATION BEHAVIOUR
Slonik waits until nodes (other than the one being dropped) are caught up with non-SYNC events from all other nodes before submitting the DROP NODE command.

VERSION INFORMATION
This command was introduced in Slony-I 1.0

In version 2.0, the default value for EVENT NODE was removed, so a node must be specified.

In version 2.2, support for dropping multiple nodes in a single command was introduced