Re: Strange performance problems

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Hello,

ok i will give it a try.

I already tested some other ciphers and i can definitely say, that the
cipher doesn´t change this strange behavior.

Kind regards,

morlix

Am 27.10.2011 20:34, schrieb Philipp Wendler:
> 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
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