From: Joel Becker <Joel.Becker@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH 3/5] ocfs2: use allocation reservations for directory data
Date: Fri, 19 Mar 2010 15:43:10 -0700 [thread overview]
Message-ID: <20100319224310.GF15539@mail.oracle.com> (raw)
In-Reply-To: <1268809154-1020-4-git-send-email-mfasheh@suse.com>
On Tue, Mar 16, 2010 at 11:59:12PM -0700, Mark Fasheh wrote:
> Use the reservations system for unindexed dir tree allocations. We
> don't bother with the indexed tree as reads from it are mostly random
> anyway. By default this behavior is turned off and can be turned on
> via mount option 'dir_resv'. Workloads which create many large
> directories will want to turn it on.
>
> A future improvement will be to use a different window size for
> directory inodes. Once done, we should change the default for this
> feature to be enabled.
Why can't we turn this on and avoid a mount option? Sure, the
reservation holds out some space, but it will be cannibalized if
the directory doesn't grow, right?
Joel
--
"I inject pure kryptonite into my brain.
It improves my kung fu, and it eases the pain."
Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2010-03-19 22:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-17 6:59 [Ocfs2-devel] [PATCH 0/5] Ocfs2 allocation reservations Mark Fasheh
2010-03-17 6:59 ` [Ocfs2-devel] [PATCH 1/5] ocfs2: " Mark Fasheh
2010-03-19 22:40 ` Joel Becker
2010-03-19 23:56 ` Mark Fasheh
2010-03-17 6:59 ` [Ocfs2-devel] [PATCH 2/5] ocfs2: use allocation reservations during file write Mark Fasheh
2010-03-17 6:59 ` [Ocfs2-devel] [PATCH 3/5] ocfs2: use allocation reservations for directory data Mark Fasheh
2010-03-19 22:43 ` Joel Becker [this message]
2010-03-20 0:14 ` Mark Fasheh
2010-03-20 1:25 ` Joel Becker
2010-03-20 3:47 ` Mark Fasheh
2010-03-20 6:18 ` Joel Becker
2010-03-21 23:26 ` Mark Fasheh
2010-03-22 20:41 ` Joel Becker
2010-03-17 6:59 ` [Ocfs2-devel] [PATCH 4/5] ocfs2: allocate btree internal block groups from the global bitmap Mark Fasheh
2010-03-17 6:59 ` [Ocfs2-devel] [PATCH 5/5] ocfs2: remove ocfs2_local_alloc_in_range() Mark Fasheh
2010-03-17 20:17 ` [Ocfs2-devel] [PATCH 0/5] Ocfs2 allocation reservations Mark Fasheh
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