Re: Versioning file system

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Bryan Henderson wrote:
>> The directory is quite visible with a standard 'ls -a'. Instead,
>> they simply mark it as a separate volume/filesystem: i.e. the fsid
>> differs when you call stat(). The whole thing ends up acting rather like
>> our bind mounts.
> 
> Hmm.  So it breaks user space quite a bit.  By break, I mean uses that 
> work with more conventional filesystems stop working if you switch to 
> NetAp.  Most programs that operate on directory trees willingly cross 
> filesystems, right?  Even ones that give you an option, such as GNU cp, 
> don't by default.
> 
> But if the implementation is, as described, wildly successful, that means 
> users are willing to tolerate this level of breakage, so it could be used 
> for versioning too.
> 
> But I think I'd rather see a truly hidden directory for this (visible only 
> when looked up explicitly).
> 

When I administered a bunch of netapps I remember turning the visible
.snapshots off.

	-hpa
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