Is there any performance difference between following docker named volumes vs bind mounted volumes? If yes, how much numbers are we talking about?

Docker volume example:

docker run -v mysql:/var/lib/mysql mysql:tag


Docker bind mount example:

docker run -v /path/to/mysql-data:/var/lib/mysql mysql:tag

These containers are used for mostly databases like elasticsearch, mysql and mongodb. Which one should I prefer?
    

        

    
    
        
            asked Nov 1, 2020 at 7:24
        
        
    
    
        
    
    
        Shinebayar GShinebayar G5,2006 gold badges22 silver badges33 bronze badges
        
    

    





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On a couple of platforms (MacOS, Windows with WSL 2) bind mounts are known to be especially slow.
Beyond that, you shouldn't see a perceptible performance difference between named volumes, the container filesystem, files in the image (regardless of the number of layers), or bind mounts (particularly on native Linux).
A good general rule might be to use bind mounts for config files and log files, where I/O is relatively rare but you as a human need to access the files directly; named volumes for database storage and other content where I/O is relatively frequent but as a human you can't directly read the files; and the image itself for your application code.
    
    
            
            
    
    
        
    
    
        Daniel H7,4632 gold badges31 silver badges45 bronze badges
        
    



            
    
        
            answered Nov 1, 2020 at 12:10
        
        
    
    
        
    
    
        David MazeDavid Maze161k46 gold badges249 silver badges289 bronze badges
        
    

        
    





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