This topic introduces the message channel-related configurations of Milvus.
  
    
      | Description | Default Value | 
  
  
    
      | Root name prefix of the channel when a message channel is created.      
        It is recommended to change this parameter before starting Milvus for the first time.      
        To share a Pulsar instance among multiple Milvus instances, consider changing this to a name rather than the default one for each Milvus instance before you start them. | by-dev | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Sub-name prefix of the message channel where the root coord publishes time tick messages.      
        The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordTimeTick}      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | rootcoord-timetick | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Sub-name prefix of the message channel where the root coord publishes its own statistics messages.      
        The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordStatistics}      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | rootcoord-statistics | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Sub-name prefix of the message channel where the root coord publishes Data Manipulation Language (DML) messages.      
        The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordDml}      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | rootcoord-dml | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Sub-name prefix of the message channel where the query node publishes time tick messages.      
        The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.queryTimeTick}      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | queryTimeTick | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Sub-name prefix of the message channel where the data coord publishes time tick messages.      
        The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordTimeTick}      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | datacoord-timetick-channel | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Sub-name prefix of the message channel where the data coord publishes segment information messages.      
        The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordSegmentInfo}      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | segment-info-channel | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Subscription name prefix of the data coord.      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | dataCoord | 
  
  
    
      | Description | Default Value | 
  
  
    
      | Subscription name prefix of the data node.      
        Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.      
        It is recommended to change this parameter before starting Milvus for the first time. | dataNode |