ZFS Problem - full disk, can't recover space :(.

[Dr Josef Karthauser]

On 27 Mar 2011, at 09:43, Jeremy Chadwick wrote:
>>>> 
>>>> This is the problematic filesystem:
>>>> 
>>>> void/j/legacy-alpha           56.6G  3.41G  56.6G  /j/legacy-alpha
>>>> 
>>>> No chance that an application is holding any data - I rebooting and came up
>>>> in single user mode to try and get this resolved, but no cookie.
>>> 
>>> Are these filesystems using compression?  Have any quota or reservation
>>> filesystem settings set?
>>> 
>>> "zfs get all" might help, but it'll be a lot of data.  We don't mind.
>>> 
>> 
>> Ok, here you are. ( http://www.josef-k.net/misc/zfsall.txt.bz2 )
>> 
>> I suspect that the problem is the same as reported here:
>> http://web.archiveorange.com/archive/v/Lmwutp4HZLFDEkQ1UlX5 namely that there was a bug with the handling of sparse files on zfs. The file in question that caused the problem is a bayes database from spam assassin.
> 
> That was going to be my next question, actually (yep really :-) ).

So, I guess my next question is, would I be mad to apply the zpool version 28 patch to 8.2 and run with that? Or are sparse files so broken on zfs that I ought to find some ufs to run the bayesdb on?

Joe