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ZFS fragmentation

Discussion in 'General' started by samspeed, Oct 19, 2010.

  1. samspeed

    samspeed New Member

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    Anyone know how to defrag a ZFS pool? In about 6 months of working, speed with pool decreased by 5 times. I use copy from one pool to another for defragmentation by now. But it's a bad method because it needs to free some TB of HDD space.
     
  2. Savagedlight

    Savagedlight Member

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    The following was posted as a reply to the question "Is it possible to defragment a zfs pool?"
     
  3. jem

    jem Member

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    Try to keep your pool usage below 80% for decent performance. It's in the ZFS Best Practices guide:

     
  4. mururoa

    mururoa New Member

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    Oh oh, memories of vms disks defragmentation ;)
    That was first disk to tape, 2nd on 1st, 3rd on 2nd, 4th ... then 1st to 2nd and tape to first.
    Took all the night !