In the Slony-I replication system, replicated tables are organized in sets. As a general rule of thumb, a set should contain all the tables of one application, that have relationships. In a well designed application, this is equal to all the tables in one schema.
The smallest unit one node can subscribe for replication from another node is a set. A set always has an origin. In classical replication terms, that would be the "master." Since in Slony-I a node can be the "master" over one set, while receiving replication data in the "slave" role for another at the same time, this terminology may easily become misleading and should therefore be replaced with "set origin" and "subscriber".
- ID = ival
ID of the set to be created.
- ORIGIN = ival
Initial origin node of the set.
- COMMENT = 'string'
A descriptive text added to the set entry.
If none is provided, a default value is set; A replication set so boring no one thought to give it a name.
Slonik Event Confirmation Behaviour
Slonik waits for the command submitted to the previous event node to be confirmed on the specified event node before submitting this command. Slonik will also wait until any outstanding DROP SET commands are confirmed by all nodes before it submits the CREATE SET command.
This command was introduced in Slony-I 1.0
Until version 1.2, it would crash if no comment was provided.