SQL Guide : Database system tables and system views : System tables for data synchronization : SYS_SYNC_INFO
  
SYS_SYNC_INFO
This table contains synchronization information, one row for each node.
Column name
Description
NODE_NAME
Master or replica node.
NODE_CATALOG
Catalog where node belongs.
IS_MASTER
IF YES, this node is a master.
IS_REPLICA
If YES, this node is a replica.
CREATIME
Node create data and time.
CREATOR
Node creator user name.
See also
System tables for data synchronization