Multiple bricks on same node

Valerio Luccio <valerio.luccio@xxxxxxx> · Tue, 4 Apr 2017 14:27:43 -0400



    I apologize if this has been answered before, I haven't found a
      satisfying explanation.

    
    I've just set up a new gluster. We have 4 servers and each has 3
    RAIDS with separate raid controller. I wanted to create one giant
    data space and tried:

    $ gluster volume create Data replica 2 transport tcp
        host1:/brick1/data host1:/brick2/data host1:/brick3/data [...]
        host4:/brick3/data

      
    This gave me the error message:

    
    volume create: MRIData: failed: Multiple bricks of a
        replicate volume are present on the same server. This setup is
        not optimal. Use 'force' at the end of the command if you want
        to override this behavior.

      
    The 'force' option allowed me to create a volume and everything
    seems to work. The question is, whys is this not optimal ? What are
    the potential pitfalls ? I don't want to find myself with an
    unusable data space.

    Also, does it make a difference the order in which I specify the
    bricks ?

    
    Thanks,

    -- 
Valerio Luccio             (212) 998-8736
Center for Brain Imaging   4 Washington Place, Room 158
New York University        New York, NY 10003

    "In an open world, who needs windows or gates ?"
  

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