Trond Myklebust wrote:
>>
>> I assume NetApp flags the directory specially so that a POSIX directory
>> read doesn't get it. I've seen that done elsewhere.
>
> No. 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.
> It means that you avoid all those nasty user issues where people try to
> hard link to/from .snapshot directories, rename files across snapshot
> boundaries, etc.
>
Last I used a Netapp, it was configurable, I believe; I seem to also
vaguely remember that one could configure it so that it only was
accessible as part of a mount string rather than as part of an
already-mounted filesystem. Of course, this was a long time ago.
-hpa
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