func isValidAsCandidateSiblingOfIntermediateMaster(intermediateMasterInstance *inst.Instance, sibling *inst.Instance) bool {
if sibling.Key.Equals(&intermediateMasterInstance.Key) {
// same instance
return false
}
if !isGeneralyValidAsCandidateSiblingOfIntermediateMaster(sibling) {
return false
}
if sibling.HasReplicationFilters != intermediateMasterInstance.HasReplicationFilters {
return false
}
if sibling.IsBinlogServer() != intermediateMasterInstance.IsBinlogServer() {
// When both are binlog servers, failover is trivial.
// When failed IM is binlog server, its sibling is still valid, but we catually prefer to just repoint the slave up -- simplest!
return false
}
if sibling.ExecBinlogCoordinates.SmallerThan(&intermediateMasterInstance.ExecBinlogCoordinates) {
return false
}
return true
}
