I have a 3 server replication of 1 source and 2 read-only replicas running on 5.7.31-log Community. I want to add a new, 3rd read-only replica on mysql v8.0.27 (all ubuntu). I was following a guide using mysqldump and run into an issue. Someone suggested Xtrabackup. Procedure looks straight FWD following this guide:
I guess my first question is the most basic, is a mysqldump backup of v5.7 compatible with v8? Doing a full I do not know. I have done v5.7 backups of selecting out multiple databases and importing them into v8 with success.
Second, can I use a xtrabackup from v5.7 and import it into a v8 mysql, following the procedure above?