Redis-synchronize order data of multiple websites to one backend

For example, there are multiple shopping websites (PHP), order data is scattered in different server databases (such as DB1 and DB2), and the general order database (DB) facilitates centralized management, operations on the database need to be synchronized to DB1 and DB2, while the data of DB1 and DB2 needs to be updated to the database in as real time as possible. The basic implementation can be implemented using scheduled scheduling + xmlrpc, but it is a waste of resources. Please have experienced solutions! Redis server php database

For example, there are multiple shopping websites (PHP), order data is scattered in different server databases (such as DB1 and DB2), and the general order database (DB) facilitates centralized management, operations on the database need to be synchronized to DB1 and DB2, while the data of DB1 and DB2 needs to be updated to the database in as real time as possible. The basic implementation can be implemented using scheduled scheduling + xmlrpc, but it is a waste of resources. Please have experienced solutions!