Each multiplex configuration requires a coordinator node.
The coordinator node:
Runs read-only and read-write operations against shared IQ objects.
Manages IQ main dbspaces.
Manipulates local data in SQL Anywhere system and user tables.
Coordinates all read-write operations on shared IQ objects, including:
Shared IQ table locking
Shared IQ storage management
Providing global transaction IDs for read-write transactions involving shared IQ objects
Maintaining the global catalog
Controls catalog synchronization for secondary servers
Performs schema changes on shared IQ store objects
Performs schema changes on SQL Anywhere store objects
Maintains and cleans up object versions
