From: Theodore Tso <tytso@mit.edu>
To: Curt Wohlgemuth <curtw@google.com>, G@mit.edu
Cc: Andreas Dilger <adilger@sun.com>,
ext4 development <linux-ext4@vger.kernel.org>
Subject: Re: Question on block group allocation
Date: Mon, 27 Apr 2009 18:40:52 -0400 [thread overview]
Message-ID: <20090427224052.GC22104@mit.edu> (raw)
In-Reply-To: <6601abe90904262229w602e17d8s51ceae05c2895ce5@mail.gmail.com>
On Sun, Apr 26, 2009 at 11:29:39PM -0600, Curt Wohlgemuth wrote:
> The random read throughput on the 10GB file went from ~16 MB/s to ~22
> MB/s after Andreas' patch; the total fragmentation of the file was
> much lower than before his patch.
>
> However, the number of extents went up by quite a bit (I don't have
> the debugfs output in front of me at the moment, sorry).
I'm curious what you meant by the combination of these two statements,
"the total fragmentation of the file was much lower than before his
patch", and "the number of extents went up by quite a bit". Can you
send me the debugfs output when you have a chance?
Thanks,
- Ted
next prev parent reply other threads:[~2009-04-27 22:40 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-23 16:41 Question on block group allocation Curt Wohlgemuth
2009-04-23 19:08 ` Andreas Dilger
2009-04-23 22:02 ` Curt Wohlgemuth
2009-04-27 2:14 ` Theodore Tso
2009-04-27 5:29 ` Curt Wohlgemuth
2009-04-27 10:42 ` Theodore Tso
2009-04-27 22:40 ` Theodore Tso [this message]
2009-04-29 18:38 ` Curt Wohlgemuth
2009-04-29 19:37 ` Theodore Tso
2009-04-29 20:21 ` Curt Wohlgemuth
2009-04-29 21:20 ` Theodore Tso
2009-04-29 21:50 ` Theodore Tso
2009-04-29 22:29 ` Curt Wohlgemuth
2009-05-01 4:39 ` Theodore Tso
2009-05-04 15:52 ` Curt Wohlgemuth
2009-04-29 19:16 ` Theodore Tso
2009-04-27 23:12 ` Andreas Dilger
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