On Sat, Feb 16, 2019 at 1:26 PM Andrei Borzenkov <arvidj...@gmail.com> wrote:
>
> 15.02.2019 22:11, Chris Murphy пишет:

> > The proven way it works, is as I've described, and many emails over a
> > decade on this list, inferred from the man page, and the step by step
> > recipe on the Wiki.
> >
>
> Oh well.

OK, you're right, I'm wrong, however your example is the only one I've
seen in ~10 years that describes this alternative.

> btrfs send computes differential stream. Whether it will be
> "incremental" or not depends on how you are using it.

Yes, it's a difference computation, but the 'man btrfs-send' page
explicitly says incremental which is not the same thing.

Also adding 'btrfs receive' is important to test your example. I've
seen 'btrfs send' succeed where 'btrfs receive' complains.


>Stream contains differences between the first and the
> second stream, where order does matter. "Incremental" implies temporal
> ordering between two snapshots which does not exist on "btrfs send"
> level and must be ensured by tools that use "btrfs send/receive".

It's fine to have this alternative explanation. However the existing
'man btrfs-send' page says there are two modes: full and incremental.

-- 
Chris Murphy

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