On Tue, Jul 16, 2013 at 12:28 PM, Craig Sanders <[email protected]> wrote:
> On Mon, Jul 15, 2013 at 03:38:07PM +1000, Tim Connors wrote: > > > One thing I read yesterday was that zfs can be prone to issues from > > > fragmentation - is there a preventive strategy or remedial measure to > take > > > into account? > > > > Don't ever use more than 80% of your file system? > > btrfs has a 'balance' command to rebalance storage of files across the > disks (e.g. after you've added or replaced disks in the pool. That has > the side-effect of de-fragging files. > > of course, on a large pool, it takes ages to run. > > zfs doesn't have this. balance in btrfs is also used to change the pool replication (single to raid1 (1 replica) to raid 10(1 replica with striping)) and i would imagine for moving in and out of parity based replication systems. (erasure codes)
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