From: Aurelien Degremont <aurelien.degremont@cea.fr>
To: lustre-devel@lists.lustre.org
Subject: [Lustre-devel] Lustre HSM HLD draft
Date: Tue, 12 Feb 2008 16:25:06 +0100 [thread overview]
Message-ID: <47B1BA52.8040304@cea.fr> (raw)
In-Reply-To: <026801c86d67$01a0beb0$0281a8c0@ebpc>
Eric Barton a ?crit :
> Hi,
>
> Sorry if these questions duplicates previous debate.
>
> Have I understood correctly that the design allows individual objects
> within a lustre file (i.e. stripes?) to be purged independently?
>
> If so why is this needed?
>
> I would have thought that when you purge a file, you need only record
> the purged extent as an attribute of the whole lustre file and punch
> its stripes to free the space. Am I missing a use case?
Since the beginning CFS required this feature. It seems a lab ask for
it. I do not know who. Unfortunately we have no use case for what they
want to do with this.
I'm wondering if their need could not be met with other features like
the internal Lustre migration...
--
Aurelien Degremont
CEA
next prev parent reply other threads:[~2008-02-12 15:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-07 10:52 [Lustre-devel] Lustre HSM HLD draft DEGREMONT Aurelien
2008-02-08 21:18 ` Nathaniel Rutman
2008-02-11 14:59 ` Aurelien Degremont
2008-02-11 20:33 ` Nathaniel Rutman
2008-02-12 3:55 ` Andreas Dilger
2008-02-12 11:04 ` Eric Barton
2008-02-12 15:25 ` Aurelien Degremont [this message]
2008-02-12 17:23 ` Andreas Dilger
2008-02-12 19:43 ` Eric Barton
2008-02-12 23:24 ` Nathaniel Rutman
2008-02-18 21:51 ` Canon, Richard Shane
2008-02-19 17:13 ` Aurelien Degremont
2008-02-25 22:44 ` Peter J Braam
2008-02-21 15:26 ` Aurelien Degremont
2008-02-25 22:38 ` Peter J Braam
2008-02-27 16:51 ` Aurelien Degremont
2008-02-29 4:30 ` Peter Braam
-- strict thread matches above, loose matches on Subject: below --
2008-02-07 16:19 Rick Matthews
2008-02-08 0:03 ` JC.LAFOUCRIERE at CEA.FR
2008-02-08 11:52 ` Rick Matthews
2008-02-08 15:55 ` Aurelien Degremont
2008-02-11 18:18 ` Andreas Dilger
2008-02-11 19:38 ` Peter Braam
2008-02-11 21:11 ` Ricardo M. Correia
2008-02-11 21:39 ` Andreas Dilger
2008-02-11 22:07 ` Ricardo M. Correia
2008-02-11 22:32 ` Nathaniel Rutman
2008-02-11 22:46 ` Rick Matthews
2008-02-12 15:41 ` Aurelien Degremont
2008-02-12 0:25 ` Ricardo M. Correia
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