mysql-sync
Syncs two mysql databases by only inserting/deleting/updating the necessary records.
Useful in cases where mysqldump generates gigabytes of data
##Usage:
mysql-sync [source-dsn] [target-dsn]
dsn being username:password@hostname:port/database_name
Example: mysql-sync root:password@localhost:port/source_db root:password@localhost:port/dest_db
If the remote mysql port is not open, tunnel it via SSH i.e
ssh -L 3308:localhost:3306 -o TCPKeepAlive=no -o ServerAliveInterval=15 user@host
then mysql-sync root:password@localhost:3308/voeb root:password@localhost:3306/v
What the script does
- lists all tables on the remote and local host
- compares the checksum of each mysql table
- syncs the tables where checksum is invalid
- verifies the sync was successful via another checksum
The databases must have the same schema. Therefore, the script will stop if
- the number of tables is not similar
- the structure of a table is not similar i.e describe my_table