linux-ext4 - Re: 3.2 and 3.1 filesystem scalability measurements

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Date:	Mon, 30 Jan 2012 17:13:25 +0200
From:	"aziro.linux.adm" <aziro.linux.adm@...il.com>
To:	Eric Whitney <eric.whitney@...com>
CC:	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org
Subject: Re: 3.2 and 3.1 filesystem scalability measurements

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Hello List,

Is it possible to be said - XFS shows the best average results over the
test.

Regards,
George

On 1/30/2012 06:09, Eric Whitney wrote:
> I've posted the results of some 3.2 and 3.1 ext4 scalability
> measurements and comparisons on a 48 core x86-64 server at:
> 
> http://free.linux.hp.com/~enw/ext4/3.2
> 
> This includes throughput and CPU efficiency graphs for five simple
> workloads, the raw data for same, plus lockstats on ext4 filesystems
> with and without journals.  The data have been useful in improving ext4
> scalability as a function of core and thread count in the past.
> 
> For reference, ext3, xfs, and btrfs data are also included.
> 
> The most notable improvement in 3.2 is a big scalability gain for
> journaled ext4 when running the large_file_creates workload.  This
> bisects cleanly to Wu Fengguang's IO-less balance_dirty_pages() patch
> which was included in the 3.2 merge window.
> 
> (Please note that the test system's hardware and firmware configuration
> has changed since my last posting, so this data set cannot be directly
> compared with my older sets.)
> 
> Thanks,
> Eric
> 
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