From: Ric Wheeler <rwheeler@redhat.com>
To: Theodore Tso <tytso@mit.edu>
Cc: "Frédéric Bohé" <frederic.bohe@bull.net>, linux-ext4@vger.kernel.org
Subject: Re: [PATCH 2/4] Create the journal in the middle of the filesystem
Date: Thu, 28 Aug 2008 10:38:39 -0400 [thread overview]
Message-ID: <48B6B86F.5060106@redhat.com> (raw)
In-Reply-To: <20080828143648.GJ26987@mit.edu>
Theodore Tso wrote:
> On Thu, Aug 28, 2008 at 09:40:30AM -0400, Ric Wheeler wrote:
>
>> I can try and test this with my fsync() heavy fs_mark run...
>>
>>
>
> Given [1] I have no doubt that you should see a difference between
> mke2fs from e2fsprogs 1.41.0 (which will allocate the journal at the
> beginning of the filesystem) and the latest tip of e2fsprogs.
>
> It would be interesting to see how measurable the difference is,
> though. I'd recommend doing "mke2fs -t ext4dev" using both versions
> of mke2fs, and seeing how much the difference it makes.
>
> [1] http://www.usenix.org/events/usenix05/tech/general/full_papers/prabhakaran/prabhakaran_html/main.html#fig-journal-location-withinfs-fix
>
> - Ted
>
>
I was thinking of trying this on a much larger disk (1TB) - the article
reports on a 4GB partition which is pretty tiny,
ric
next prev parent reply other threads:[~2008-08-28 14:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-27 17:36 Journal file fragmentation Frédéric Bohé
2008-08-27 20:12 ` Jose R. Santos
2008-08-27 21:06 ` Theodore Tso
2008-08-27 21:14 ` [PATCH 1/4] ext2fs_mkjournal(): Don't allocate an extra block to the journal Theodore Ts'o
2008-08-27 21:14 ` [PATCH 2/4] Create the journal in the middle of the filesystem Theodore Ts'o
2008-08-27 21:14 ` [PATCH 3/4] ext2fs_block_iterate2: Add BLOCK_FLAG_APPEND support for extent-based files Theodore Ts'o
2008-08-27 21:14 ` [PATCH 4/4] If the filesystem supports extents create an extent-based journal inode Theodore Ts'o
2008-08-28 9:55 ` [PATCH 2/4] Create the journal in the middle of the filesystem Frédéric Bohé
2008-08-28 13:34 ` Theodore Tso
2008-08-28 13:40 ` Ric Wheeler
2008-08-28 14:36 ` Theodore Tso
2008-08-28 14:38 ` Ric Wheeler [this message]
2008-09-03 14:08 ` Ric Wheeler
2008-08-28 16:16 ` Frédéric Bohé
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