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Re: LWN.net article: creating 1 billion files -> Tests we did

To: pg@xxxxxxxxxxxxxxxxxxx (Peter Grandi)
Subject: Re: LWN.net article: creating 1 billion files -> Tests we did
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Sat, 18 Sep 2010 13:39:24 +0200
Cc: Linux XFS <xfs@xxxxxxxxxxx>
In-reply-to: <19603.51260.32944.928119@xxxxxxxxxxxxxxxxxx>
Organization: Intellique
References: <201008191312.49346@xxxxxx> <20100916121350.3ab30ca5@xxxxxxxxxxxxxxxxxxxx> <19603.51260.32944.928119@xxxxxxxxxxxxxxxxxx>
Le Fri, 17 Sep 2010 20:57:48 +0100 vous écriviez:

> LWN is usually fairly decent, but I have noticed it does
> occasionally waste pixels on/bits things that the author(s)
> misrepresent as storage or file system tests.

How unfortunate we missed your precious stance on that matter. Everybody
knows that benchmarks are mostly useless /per se/, however it often
occurs that comparative benchmarks may easily reveal some interesting

As for the interest of an experiment of pushing something to the limit
for the sake of it, it may equally reveal interesting bugs. The fact
that all filesystems in this tests didn't simply *fail* under the load
is by itself revealing of the overall robustness and stability of
these, the VFS and Linux kernel. 

As a side note, were you using a slightly less harsh tone, you'd
probably be help people being less reluctant to discuss those points
more deeply.

Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |   <eflorac@xxxxxxxxxxxxxx>
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