Hi, If your tables are in innodb you can use the --single-transaction option. You can do your dump with your slave active with this. --single-transaction Creates a consistent snapshot by dumping all tables in a single transaction. Works ONLY for tables stored in storage engines which support multiversioning (currently only InnoDB does); the dump is NOT guaranteed to be consistent for other storage engines. Option automatically turns off --lock-tables.I use kls backup for backing up my system.