niota

At the same time on a machine there must not be a second server that is using the same port number.
So if you want to use the same port number for old N-MDDB and new N-MDDB you must temporarily switch the port of one of this services during data migration

• stop MySQL service where your metadata are located if it's not running with “–federated” option
• start MySQL service with “–federated” option
• open a MySQL client and connect as “root” to the MySQL server of the new (target) release
• open script to create a database to read data from the old (source) release
• check if database was created successfully
• open script to create federated server
• run script to create federated server
• open script to create federated tables to read data from the source release
• run script to create federated tables
• check if tables are created and data can be retrieved for every table
• open script to run migration procedure
• run migration procedure for every group of metadata tables