Re: btrfs send reproducibly fails for a specific subvolume after sending 15 GiB, scrub reports no errors

[Christoph Anton Mitterer <calestyo@scientia.net>]

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On Tue, 2015-11-24 at 15:44 -0500, Austin S Hemmelgarn wrote:
> I would say it's currently usable for one-shot stuff, but probably
> not 
> reliably useable for automated things without some kind of 
> administrative oversight.  In theory, it wouldn't be hard to write a 
> script to automate fixing this particular issue when send encounters
> it, 
> but that has it's own issues (you have to either toggle the snapshot 
> writable temporarily, or modify the source and re-snapshot).

Well AFAIU, *this* very issue is at least something that bails out
loudly with an error... I rather worry about cases where send/receive
just exits without any error (status or message) and still didn't
manage to correctly copy everything.

The case that I had was that I incrementally send/received (with -p)
backups to another disk.
At some point in time I removed one of the older snapshots on that
backup disk... and then had fs errors... as if the data would have been
gone.. :(

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