Use partitioned tables when appropriate.Enable the constraints and verify the data after the load to ensure referential integrity. Disabling foreign key checks provides performance gains. Use the disable-keys option in mysqldump when dumping data, to disable foreign key constraints before load.Use the order-by-primary option in mysqldump when dumping databases, so that the data is scripted in primary key order. This results in a smaller dump file and speeds up inserts when the file is reloaded. Use the extended-insert multiple-row syntax that includes several VALUE lists.To dump large tables, combine the single-transaction option with the quick option. The single-transaction option and the lock-tables option are mutually exclusive because LOCK TABLES causes any pending transactions to be committed implicitly. Dumping many tables within a single transaction causes some extra storage to be consumed during restore. Use the single-transaction option to set the transaction isolation mode to REPEATABLE READ and sends a START TRANSACTION SQL statement to the server before dumping data.Exclude triggers from dump files to avoid the trigger commands firing during the data restore. Use the exclude-triggers option in mysqldump when dumping databases.To optimize performance, take notice of these considerations when dumping large databases: Then run mysql_upgrade, before attempting migration into an Azure Database for MySQL. If you need to upgrade across MySQL versions, first dump or export your lower version database into a higher version of MySQL in your own environment.The mysql_upgrade command does not function in an Azure Database for MySQL server, and is not supported. For example, if your existing MySQL server is version 5.7, then you should migrate to Azure Database for MySQL configured to run version 5.7. To avoid any compatibility issues, ensure the same version of MySQL is used on the source and destination systems when dumping databases.INSERT INTO innodb_table SELECT * FROM myisam_table ORDER BY primary_key_columns Use the clause ENGINE=InnoDB to set the engine used when creating a new table, then transfer the data into the compatible table before the restore. If your tables are configured with other storage engines, convert them into the InnoDB engine format before migration to Azure Database for MySQL.įor example, if you have a WordPress or WebApp using the MyISAM tables, first convert those tables by migrating into InnoDB format before restoring to Azure Database for MySQL. Migrating from alternative storage engines to InnoDB - Azure Database for MySQL supports only InnoDB Storage engine, and therefore doesn't support alternative storage engines. In order to move your backup storage from locally redundant storage to geo-redundant storage, dump and restore is the ONLY option. Once the server is provisioned, you can't change the backup storage redundancy option. Moving your backup storage from locally redundant to geo-redundant storage - Azure Database for MySQL allows configuring locally redundant or geo-redundant storage for backup is only allowed during server create. Migrating from on-premises environment or Virtual machine - Azure Database for MySQL doesn't support restore of physical backups, which makes logical backup and restore as the ONLY approach. Moving from other managed service provider - Most managed service provider may not provide access to the physical storage file for security reasons so logical backup and restore is the only option to migrate. Learn how to migrate large MySQL databases. If you are looking to migrate large databases with database sizes more than 1 TBs, you may want to consider using community tools like mydumper/myloader which supports parallel export and import. MySQL Workbench or another third-party MySQL tool to do dump and restore commands.mysqldump command-line utility installed on a machine.Create Azure Database for MySQL server - Azure portal.To step through this how-to guide, you need to have: This guide provides guidance that leads the successful planning and execution of a MySQL migration to Azure. You can also refer to Database Migration Guide for detailed information and use cases about migrating databases to Azure Database for MySQL. Dump and restore from the command-line (using mysqldump).This article explains two common ways to back up and restore databases in your Azure Database for MySQL For more information about migrating to Azure Database for MySQL - Flexible Server, see What's happening to Azure Database for MySQL Single Server? We strongly recommend for you to upgrade to Azure Database for MySQL - Flexible Server. Azure Database for MySQL - Single Server is on the retirement path.
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