Re: Never balance metadata?

[Zygo Blaxell <ce3g8jdj@umail.furryterror.org>]

On Sun, Feb 12, 2023 at 12:10:16PM +0200, Jukka Larja wrote:
> After balance, the everyday
> scanning for changes only takes couple of seconds. Backups are also much
> faster, though as they run during night, it doesn't much matter.

It would be interesting to compare the results of a metadata balance with
a metadata defrag ('btrfs fi defrag /path/to/subvolume' _without_ -r).

I suspect a metadata defrag has much the same side-effect as the metadata
balance (reduce average seek distance between pages), but metadata defrag
won't reduce spare metadata allocations to zero.

> The filesystem was created June 2010 (probably) and every one of the
> original disks and some that came after have been replaced. This was the
> first time I balanced metadata, as far as I can remember. I think it does
> make sense to balance every now and then, if only once a decade :D .
> 
> -JLarja
> 
> -- 
>      ...Elämälle vierasta toimintaa...
>     Jukka Larja, Roskakori@aarghimedes.fi
> 
> <saylan> I just set up port forwards to defense.gov
> <saylan> anyone scanning me now will be scanning/attacking the DoD :D
> <renderbod> O.o
> <bolt> that's... not exactly how port forwarding works
> <saylan> ?
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