linux-ext4 - Re: [RFC][PATCH 0/3] ext4: inode preferred block allocation

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Date:	Tue, 20 Apr 2010 00:39:38 +0200
From:	Jan Kara <jack@...e.cz>
To:	Greg Freemyer <greg.freemyer@...il.com>
Cc:	Kazuya Mio <k-mio@...jp.nec.com>,
	ext4 <linux-ext4@...r.kernel.org>, Theodore Tso <tytso@....edu>,
	linux-fsdevel@...r.kernel.org,
	OHSM-DEV <ohsm-devel@...ts.sourceforge.net>,
	Dmitry Monakhov <dmonakhov@...nvz.org>
Subject: Re: [RFC][PATCH 0/3] ext4: inode preferred block allocation

On Thu 15-04-10 12:22:38, Greg Freemyer wrote:
<snip>
> fyi: Creating locality groups is the use case I see for Dmitry's
> Project ID patchset.  A collection of files that are used together can
> be assigned a unique ProjectID and then e4defrag can grow the
> knowledge to place them within a locality area on the disk.
> 
> But I also can see that new files within a directory would inherit the
> ProjectID from the directory, and the data blocks allocated from the
> correct locality area from the get go.
> 
> Dmitry, I haven't studied your patchset, but does it allow for
> ProjectID inheritance from the parent directory?
  Yes, ProjectID should be inherited from the parent directory.

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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