pt-table-sync

pt-table-sync is a tool in the Percona Toolkit that performs table synchronization. It compares data between two tables and makes them identical. This tool is useful in situations where data inconsistency occurs between tables, such as after a replication failure or during a master failover.

pt-table-sync works by comparing the data in the tables based on their primary keys or unique indexes. It then generates SQL statements to update or delete rows in the target table to match the source table. The tool also has options to optimize its performance, such as chunking the updates and using the --execute flag to apply the changes directly to the target table.

Overall, pt-table-sync is a powerful tool for ensuring data consistency between tables and can be used to save time and effort in manual data synchronization.