On 2014-09-22 16:51, Stefan G. Weichinger wrote:
> Am 20.09.2014 um 11:32 schrieb Duncan:
>
>> What I do as part of my regular backup regime, is every few kernel cycles
>> I wipe the (first level) backup and do a fresh mkfs.btrfs, activating new
>> optional features as I believe appropriate.  Then I boot to the new
>> backup and run a bit to test it, then wipe the normal working copy and do
>> a fresh mkfs.btrfs on it, again with the new optional features enabled
>> that I want.
>
> Is re-creating btrfs-filesystems *recommended* in any way?
>
> Does that actually make a difference in the fs-structure?
>
I would recommend it, there are some newer features that you can only 
set at mkfs time.  Quite often, when a new feature is implemented, it is 
some time before things are such that it can be enabled online, and even 
then that doesn't convert anything until it is rewritten.
> So far I assumed it was enough to keep the kernel up2date, use current
> (stable) btrfs-progs and run some scrub every week or so (not to mention
> backups .. if it ain't backed up, it was/isn't important).
>
> Stefan
>
>