VReplication FAQ

Common issues/questions while operating VReplication workflows.

What mysql permissions are needed by VReplication?
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, PROCESS, FILE, 
  REFERENCES, INDEX, ALTER, SHOW DATABASES, CREATE TEMPORARY TABLES,
  LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW,
  SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER, EVENT, TRIGGER
  ON *.* TO 'vt_filtered'@'localhost';
Why am I seeing io.EOF errors in my workflow?

io.EOF errors can be difficult to track down. These are usually caused by an issue at the mysql server. Here are some possible reasons:

  • GTID is not enabled on the server. VReplication requires GTID=on (permissible is not supported)
  • Permissions are not setup correctly for the vreplication mysql user
  • Row-based replication (RBR) binlog_format=row is not enabled. Statement-based replication (SBR) is not supported by VReplication
  • The mysql server is down or not reachable
What GTID-related options do I need to set in my my.cnf?
log_bin=1
binlog_format=ROW
binlog_row_image=full
VReplication FAQ