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Re: Anyone using XFS in production on > 20TiB volumes?

To: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Subject: Re: Anyone using XFS in production on > 20TiB volumes?
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Thu, 23 Dec 2010 19:55:44 +0100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <alpine.DEB.2.00.1012231304130.12482@xxxxxxxxxxxxxxxx>
Organization: Intellique
References: <alpine.DEB.2.00.1012221128440.5245@xxxxxxxxxxxxxxxx> <20101222175611.1c7d5190@xxxxxxxxxxxxxxxxxxxx> <4D124B71.9030401@xxxxxxxxxxx> <20101223012655.2681c596@xxxxxxxxxxxxxx> <alpine.DEB.2.00.1012221928050.7452@xxxxxxxxxxxxxxxx> <20101223005630.GJ4907@dastard> <alpine.DEB.2.00.1012230442150.7452@xxxxxxxxxxxxxxxx> <alpine.DEB.2.00.1012231304130.12482@xxxxxxxxxxxxxxxx>
Le Thu, 23 Dec 2010 13:06:10 -0500 (EST) vous écriviez:

> http://home.comcast.net/~jpiszcz/20101223/final.html

Something's wrong with the file create/stat/delete tests. Did you mount
with "nobarrier"? 
Which drives, controller firmware, raid level, stripe width? 

BTW don't run only one test, it's meaningless. I always run at least 8
cycles (and up to 30 or 40 cycles) and then calculate the average and
standard deviation, because one test among a cycle may vary wildly for
some reason. You don't need the "char" tests, that doesn't correspond
to any real-life usage pattern. Better run bonnie with the -f option,
and -x with some large enough value.

Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |   <eflorac@xxxxxxxxxxxxxx>
                    |   +33 1 78 94 84 02

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