From: Arno Wagner <arno@wagner.name>
To: Markus Krainz <ldm@gmx.at>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] Improving performance?
Date: Fri, 12 Nov 2010 02:21:44 +0100 [thread overview]
Message-ID: <20101112012144.GA7616@tansi.org> (raw)
In-Reply-To: <4CDC3C5E.1020108@gmx.at>
On Thu, Nov 11, 2010 at 07:56:30PM +0100, Markus Krainz wrote:
>
> On 2010-11-11 19:26, Lasse Jensen wrote:
>> I havent tested my current setup this way, but my old setup, RAID
>> first, then encryption worked fine.
>
> RAID first, den ecryption works for me, too.
> But testing the ecrypting drives seperately, then RAID approach failed.
> What good is fast performance if the RAID 5 does not work? :D
I Have not tried encytion first, but I have several 3-way RAID1
with RAID first runnign without a problem for > 2 years now.
(It is partition RAID1, only 3 disks involved.)
I would imagine that encryption-first is a bit of a risk until
the kernel barriers have been cleaned up. BTW, I see significantly
better behavior with 2.6.36. Hope they manage to clean this mess
up by 2.6.37. The kernel used to be tunable to not slow to a crawl
when writing large amounts of data onto slow devices. One of the
ugly secrets up to 2.6.35.
Arno
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name
GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
If it's in the news, don't worry about it. The very definition of
"news" is "something that hardly ever happens." -- Bruce Schneier
next prev parent reply other threads:[~2010-11-12 1:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-11 18:56 [dm-crypt] Improving performance? Markus Krainz
2010-11-12 1:21 ` Arno Wagner [this message]
2010-11-12 5:00 ` dave b
2010-11-12 7:10 ` Heinz Diehl
-- strict thread matches above, loose matches on Subject: below --
2010-11-11 10:49 Lasse Jensen
2010-11-11 11:30 ` Arno Wagner
2010-11-11 18:16 ` Lasse Jensen
2010-11-11 17:03 ` Heinz Diehl
2010-11-11 17:06 ` Rick Moritz
2010-11-11 20:59 ` Heinz Diehl
2010-11-11 21:25 ` Rick Moritz
2010-11-11 18:19 ` Lasse Jensen
2010-11-11 17:40 ` Zdenek Kaspar
2010-11-11 17:59 ` Markus Krainz
2010-11-11 19:10 ` epvdm
2010-11-11 21:24 ` Richard Zidlicky
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