linux-kernel - Re: Poor interactive performance with I/O loads with fsync()ing

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Message-ID: <20100317033010.GE8256@thunk.org>
Date:	Tue, 16 Mar 2010 23:30:10 -0400
From:	tytso@....edu
To:	Ben Gamari <bgamari.foss@...il.com>
Cc:	linux-kernel@...r.kernel.org, Olly Betts <olly@...vex.com>,
	martin f krafft <madduck@...duck.net>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing

On Tue, Mar 16, 2010 at 08:18:09PM -0700, Ben Gamari wrote:
> Sorry about the lack of any useful information in my initial email.
> I clearly didn't read it before sending.
> 
> On Tue, 16 Mar 2010 21:24:39 -0400, tytso@....edu wrote:
> > What kernel version are you using; what distribution and what version
> > of that distro are you running; what file system are you using and
> > what if any mount options are you using?  And what kind of hard drives
> > do you have?
> 
> While this problem has been around for some time, my current configuration
> is the following:
> 
>   Kernel 2.6.32 (although also reproducible with kernels at least as early as 2.6.28)
>   Filesystem: Now Btrfs (was ext4 less than a week ago), default mount options
>   Hard drive: Seagate Momentus 7200.4 (ST9500420AS)
>   Distribution: Ubuntu 9.10 (Karmic)

.... so did switching to Btrfs solve your latency issues, or are you
still having problems?

						- Ted
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