Re: Fwd: Separate --block.wal --block.db bluestore not working as expected.

Hervé Ballans <herve.ballans@xxxxxxxxxxxxx> · Mon, 9 Apr 2018 10:19:16 +0200



      Hi,
      Just a little question regarding
          this operation :
      
      [root@osdhost
          osd]# ceph-volume lvm prepare --bluestore --data /dev/sdc
          --block.wal /dev/sda2 --block.db /dev/sda1
      On a previous
          post, I understood that if both wal and db are stored on the
          same separate device, then we could use a single partition for
          both...which means we could do :
      #
          ceph-volume lvm prepare --bluestore --data /dev/sdc
          --block.wal /dev/sda1 --block.db /dev/sda1
      and so on
          with other uniq wal/db partition for other OSD...
      Did I get
          that correctly ?

        
        Thanks,
      Hervé
      

      Le 07/04/2018 à 17:59, Gary Verhulp a écrit :

    
      I’m trying to
          create bluestore osds with separate --block.wal --block.db
          devices on a write intensive SSD
      I’ve split
          the SSD (/dev/sda) into two partditions sda1 and sda2 for db
          and wal
       
      I seems to me
          the osd uuid is getting changed and I’m only able to start the
          last OSD
      Do I need to
          create a new partition or logical volume on the SSD for each
          OSD? 
      I’m sure this
          is a simple fail in my understanding of how it is supposed to
          be provisioned. 
      Any advice
          would be appreciated.
      Thanks,
      Gary
      [root@osdhost
          osd]# ceph-volume lvm prepare --bluestore --data /dev/sdc
          --block.wal /dev/sda2 --block.db /dev/sda1
    
    
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