[Federated-fs] FSN and filesets
Daniel Ellard
daniel.ellard at netapp.com
Tue Oct 2 10:41:42 PDT 2007
It's possible that resolution can traverse multiple junctions. I don't
think this is (necessarily) a problem, as long as we make progress down the
path.
A hazard would be if the admin creates a junction that loops back to one of
its ancestors in the namespace, causing resolution to go into a loop. (Do
v4 clients recognize when they're going around in a referral look?) We
currently trust the admins to do the right thing -- should we do something
stronger?
-Dan
On 10/2/07 1:23 PM, "Raj, Theresa" <Theresa.Raj at netapp.com> wrote:
> Ok.
>
> I have a question about FSLs and the pathname that it provides. Is there
> anything that percludes the admin from setting up this pathname such
> that one or more of its component is a junction? If this pathname has
> junction components then I'm afraid that clients will never resolve this
> pathname and could keep ping ponging between fileservers.
>
> Theresa
>
>> -----Original Message-----
>> From: Ellard, Daniel
>> Sent: Tuesday, October 02, 2007 8:25 AM
>> To: Raj, Theresa; 'federated-fs at sdsc.edu'
>> Subject: RE: [Federated-fs] FSN and filesets
>>
>>
>> If that's the case, then that's something else that does
>> need to be distinguished!
>>
>> A junction represents the relationship between a directory
>> in one fileset (or more generally, a node in the namespace)
>> and the root of another fileset. If filesets are the
>> building blocks, then junctions are the nails, or the glue
>> (pick your metaphor).
>>
>> -Dan
>>
>>> -----Original Message-----
>>> From: Raj, Theresa
>>> Sent: Tuesday, October 02, 2007 11:18 AM
>>> To: Ellard, Daniel; federated-fs at sdsc.edu
>>> Subject: RE: [Federated-fs] FSN and filesets
>>>
>>> It seems to me that junction is another term that is being used
>>> interchangeably for a fileset. Or at least, I haven't made the
>>> distinction between a fileset and a junction.
>>>
>>> Theresa
>>>
>>>> -----Original Message-----
>>>> From: Ellard, Daniel
>>>> Sent: Monday, October 01, 2007 12:34 PM
>>>> To: federated-fs at sdsc.edu
>>>> Subject: [Federated-fs] FSN and filesets
>>>>
>>>>
>>>> The current document defines fileset first, and then FSN,
>>> and then
>>>> says that these two terms are used interchangably.
>>>> I'd like to scrub the document and fix the usage to keep
>>> these terms
>>>> distinguished. A fileset is the unit of management and
>>> abstraction
>>>> for data, and a FSN is a name for a fileset. It's useful
>>> to be able
>>>> to distinguish between the thing and the name of the thing.
>>>>
>>>> Thoughts?
>>>> -Dan
>>>>
>>>>
>>>>
>>>
>>
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