Re: How to properly deal with NEAR FULL OSD

Lionel Bouton <lionel-subscription@xxxxxxxxxxx> · Fri, 19 Feb 2016 22:38:55 +0100



    Le 19/02/2016 17:17, Don Laursen a
      écrit :

    
        Thanks.
            To summarize
        Your
            data, images+volumes = 27.15% space used
        Raw
            used = 81.71% used
         
        This
            is a big difference that I can’t account for? Can anyone? So
            is your cluster actually full?
      
    
    I believe this is the pool size being accounted for and it is
    harmless: 3 x 27.15 = 81.45 which is awfully close to 81.71.

    We have the same behavior on our Ceph cluster.

    
        I
            had the same problem with my small cluster. Raw used was
            about 85% and actual data, with replication, was about 30%.
            My OSDs were also BRTFS. BRTFS was causing its own problems.
            I fixed my problem by removing each OSD one at a time and
            re-adding as the default XFS filesystem. Doing so brought
            the percentages used to be about the same and it’s good now.
      
    
    That's odd : AFAIK we had the same behaviour with XFS before
    migrating to BTRFS.

    
    Best regards,

    
    Lionel

  
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