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Date:      Mon, 26 Feb 2001 14:54:48 -0700 (MST)
From:      Nate Williams <nate@yogotech.com>
To:        Drew Eckhardt <drew@PoohSticks.ORG>
Cc:        Marc W <mwlist@lanfear.com>, freebsd-hackers@FreeBSD.ORG
Subject:   Re: Is mkdir guaranteed to be 'atomic' ?? 
Message-ID:  <15002.53416.901436.285883@nomad.yogotech.com>
In-Reply-To: <200102262147.f1QLlon10675@chopper.Poohsticks.ORG>
References:  <200102262058.MAA39009@akira.lanfear.com> <200102262147.f1QLlon10675@chopper.Poohsticks.ORG>

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> >    is mkdir(3) guaranteed to be atomic?  
> 
> Yes.
> 
> >Are there filesystem type cases where this might not be the case 
> >(NFS being my main concern ....)
> 
> No.

Yes.  NFS doesn't guarantee atomicity, because it can't.  If the mkdir
call returns, you have no guarantee that the remote directory has been
created (caching, errors, etc...)




Nate

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