From: bert hubert <ahu@ds9a.nl>
To: Andrew Morton <akpm@osdl.org>
Cc: Alberto Bertogli <albertogli@telpin.com.ar>,
linux-kernel@vger.kernel.org
Subject: Re: Syncing a file's metadata in a portable way
Date: Sat, 10 Jul 2004 13:54:04 +0200 [thread overview]
Message-ID: <20040710115404.GA11420@outpost.ds9a.nl> (raw)
In-Reply-To: <20040709023948.59497dca.akpm@osdl.org>
On Fri, Jul 09, 2004 at 02:39:48AM -0700, Andrew Morton wrote:
> It depends on the Linux filesystem. On ext3, for example, fsync() will
> sync all of the filesytem's metadata (and data in journalled and ordered
> data mode).
I've noticed that on ext3, SQLite transactions are nearly useless, with the
smallest transactions causing 5 megabyte/s writout activity based on
relatively small writes. kjournald bore a large part of that according to
laptop_mode's block dump.
Do we actually need to flush the journal on fsync? I'm no fs theorist but I
wonder if having data in the journal isn't good enough - in case of failure,
the data will be there on recovery?
--
http://www.PowerDNS.com Open source, database driven DNS Software
http://lartc.org Linux Advanced Routing & Traffic Control HOWTO
next prev parent reply other threads:[~2004-07-10 11:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-09 3:06 Syncing a file's metadata in a portable way Alberto Bertogli
2004-07-09 9:39 ` Andrew Morton
2004-07-10 11:54 ` bert hubert [this message]
2004-07-10 20:14 ` Andrew Morton
2004-07-11 10:27 ` bert hubert
2004-07-11 10:35 ` Andrew Morton
2004-07-11 14:19 ` Alberto Bertogli
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