In MySQL database operations, you often need to rebuild slaves. They fail for a lot of different reasons, fall out of sync or crash. When this happens you may find you need to reclone and start fresh. This is normally done by finding your authoritative master database, and doing a hotbackup.
Click through to the end for multi-master solutions that work with MySQL.
Reason 4 – You cannot reclone without single master
If you use active-active multi-master replication, you no longer have a single authoritative master copy of all your data. That means you have no reliable master to clone from, if a replica breaks.
If you’re an operational dba, you probably know that MySQL replication breaks regularly. You always need to be able to go back to a fresh copy when things get mixed up on the slaves.