Re: Help: pool not responding

Lionel Bouton <lionel-subscription@xxxxxxxxxxx> · Mon, 29 Feb 2016 22:56:05 +0100



    Le 29/02/2016 22:50, Shinobu Kinjo a
      écrit :

    
        the fact that they are optimized for benchmarks and certainly not
Ceph OSD usage patterns (with or without internal journal).

      
      Are you assuming that SSHD is causing the issue?
If you could elaborate on this more, it would be helpful.
    
    
    Probably not (unless they reveal themselves extremely unreliable
    with Ceph OSD usage patterns which would be surprising to me).

    
    For incomplete PG the documentation seems good enough for what
    should be done :

    http://docs.ceph.com/docs/master/rados/operations/pg-states/

    
    The relevant text:

    
    Incomplete
    Ceph detects that a placement group is missing information about
      writes that may have occurred, or does not have any healthy
      copies. If you see this state, try to start any failed OSDs that
      may
      contain the needed information or temporarily adjust min_size to
      allow recovery.
    

    We don't have the full history but the most probable cause of these
    incomplete PGs is that min_size is set to 2 or 3 and at some time
    the 4 incomplete pgs didn't have as many replica as the min_size
    value. So if setting min_size to 2 isn't enough setting it to 1
    should unfreeze them.

    
    Lionel

  
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