• Master A mysql 8
  • Master B mysql 5.7
  • Master C mysql 5.7
  • Slave mysql 8

i create 4 channels on my slave and i can not restore backup from master.

[root@CentOS-76-64-minimal hex]# gunzip < db.gz | mysql -u root -p
Enter password:
ERROR 3079 (HY000) at line 22: Multiple channels exist on the slave. Please provide channel name as an argument.
  • 3 Masters in a circle? Ugh. – Rick James Jun 8 '19 at 5:28
  • 1
    3 different master and one slave (for backup) – Goran Siriev Jun 8 '19 at 7:26

Try this

mysql> create database mydb;
mysql> use mydb;
mysql> source db_backup.dump;

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