[Federated-fs] Conf call 6/5/2008

LeMahieu, Paul LeMahieu_Paul at emc.com
Wed Jun 11 10:56:08 PDT 2008


I actually did mean to say ³I¹m talking about², but that seems to have been
confusing.

What I meant is what you describe below. The NSDB would be storing the
top-of-tree junctions, not all junctions at arbitrary depths in the
namespace.

--Paul


On 08/6/11 10:51, "Ellard, Daniel" <Daniel.Ellard at netapp.com> wrote:

> Did you mean to write "I'm *not* talking about..." instead of "I'm talking
> about..."?  If not, then I'm confused about what we talked about yesterday and
> I'm not sure what top-of-tree means.
>  
> Let's work through a concrete example so we can make sure we're using the same
> definitions.
>  
> Imagine that the namespace consists of the following paths and their prefixes:
>  
>     /a/B/c/D/e/F/g
>     /a/H/i/J/k/L/m
>     /a/N/o/P/q
>  
> Where items whose names are capitalized (B, D, F, H, J, L, N, P) are
> junctions, and other items are ordinary directories or files EXCEPT /a/, which
> is a special directory that can contain only junctions (or directories that
> contain only directories or junctions, recursively...  No ordinary files,
> links, etc are permitted in the root fileset)
>  
> So, in my understanding, the top-of-tree junctions are /a/B, /a/H/, /a/N, and
> no others.  If I've got this wrong, let's work to normalize our definitions!
>  
> -Dan
> 
> 
> From: LeMahieu, Paul [mailto:LeMahieu_Paul at emc.com]
> Sent: Wednesday, June 11, 2008 1:19 PM
> To: Everhart, Craig; Robert Thurlow
> Cc: Ellard, Daniel; federated-fs at sdsc.edu
> Subject: Re: [Federated-fs] Conf call 6/5/2008
> 
> Yes, it¹s independent of anything with DNS. When I say ³top-of-tree², I¹m
> talking about storing all the configuration of the namespace (tens of
> thousands of junction points and their paths in the logical namespace). For
> example, if there is /fedfs/home/bob, there is an entry mapping
> /fedfs/home/bob to bob¹s share on some physical file server. We¹d be storing a
> pseudo file system representing the top-of tree in the NSDB.
> 
> --Paul
> 
> 
>>  
> 

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