mysqlhotcopy

mysqlhotcopy is a Perl script that facilitates the backup of MySQL databases. It is designed to create consistent backups of MyISAM tables without requiring downtime. The script works by locking the tables to be backed up, copying the corresponding data files, and then unlocking them. This method ensures that the copied data reflects a single point in time, preventing inconsistencies that can arise from ongoing write operations during a backup.

The primary advantage of mysqlhotcopy is its ability to perform backups while the database remains accessible to users, minimizing disruption to applications. It is particularly useful for environments where frequent backups are necessary and downtime is unacceptable. The script utilizes the operating system's file copy utilities, making it a relatively simple and efficient solution.

To use mysqlhotcopy, you typically need to specify the database(s) to be backed up, the destination directory for the backup files, and the MySQL connection credentials. The script handles the locking, copying, and unlocking process automatically. It is important to note that mysqlhotcopy is primarily designed for MyISAM table backups. For InnoDB tables, which use transaction logs, different backup strategies are generally recommended, such as using mysqldump with appropriate options or specialized tools like Percona XtraBackup.