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Message-ID: <4EA9A453.8040103@philippwendler.de>
Date: Thu, 27 Oct 2011 20:34:59 +0200
From: Philipp Wendler <ml@philippwendler.de>
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Subject: Re: [dm-crypt] Strance performance problems
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To: dm-crypt@saout.de

Hi,

Am 27.10.2011 18:11, schrieb morlix:

> Which brings ~5MB/s write performance on the encrypted raid 5.
> 
> What i find strange is the huge avgqu-sz.
> 
> 
> I have no clue what the reason for this poor write performance could be.
> 
> Thanks for every hint to resolve this issue.

I have the same problem[1][2].
One other person with the same problem contacted me after this.
Apparently for him a smaller chunk size of the raid 5 (64k instead of
512k) solved the problem, but I have not been able to test this yet. I
would be very interested to know whether this helps for you.

Greetings, Philipp

[1] http://www.saout.de/pipermail/dm-crypt/2011-July/001773.html
[2] http://superuser.com/q/305716/84630