linux-ext4 - Re: e4defrag and immutable files

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Message-ID: <20100601194924.GF4426@thunk.org>
Date:	Tue, 1 Jun 2010 15:49:24 -0400
From:	tytso@....edu
To:	Sunil Mushran <sunil.mushran@...cle.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, linux-ext4@...r.kernel.org,
	Joel Becker <Joel.Becker@...cle.com>,
	Mark Fasheh <mfasheh@...e.com>
Subject: Re: e4defrag and immutable files

On Tue, Jun 01, 2010 at 12:32:29PM -0700, Sunil Mushran wrote:
> 
> We (ocfs2) are looking to add a new attribute to denote files that
> have a fixed allocation on disk. But at the same time, allow writes
> that do not change the allocation on disk. No truncating, extending,
> filling holes, etc. We were thinking of calling it "Static" files.

That's an interesting set of semantics, and it might make sense to
conflate that with a local disk "don't move or defrag" the file
option.  I'm not crazy with the name "static", since it could mean a
number of other things in other contexts, but I admit I can't think of
a better name.

					- Ted
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