Stability of unionfs - general recommendation?

Fbsd8 fbsd8 at
Sat Jun 7 11:58:58 UTC 2014

Andrew Berg wrote:
> On 2014.06.06 03:35, Matthias Petermann wrote:
>> My internet research yielded some questionable results on the stability of
>> unionfs. I understood there was an "old" implementation and a "newer" one
>> introduced in FreeBSD 6.3[1].
> I asked about this on the doc mailing list (because of the the way the man page
> is worded) and was told the new unionfs implementation deserves the big scary
> warning in the man page about as much as the old one. There have also been some
> recent discussions on IRC with the same general feeling, so I wouldn't trust it.

General recommendation is to use nullfs and not unionfs for reasons you 
all ready found. port sysutils/jail-primer explains it nicely and has 
scripts you can use.

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