From: Brad Campbell <lists2009@fnarfbargle.com>
To: Sam Bingner <sam@bingner.com>
Cc: Christoph Anton Mitterer <calestyo@scientia.net>,
"linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: some general questions on RAID
Date: Fri, 05 Jul 2013 11:06:43 +0800 [thread overview]
Message-ID: <51D63843.50306@fnarfbargle.com> (raw)
In-Reply-To: <CDFB4726.1374F%sam@bingner.com>
On 05/07/13 09:39, Sam Bingner wrote:
> On 7/4/13 3:13 PM, "Brad Campbell" <lists2009@fnarfbargle.com> wrote:
>
>> On 05/07/13 02:30, Christoph Anton Mitterer wrote:
>> When I say max out, I run into bandwidth limits on the hardware before
>> dmcrypt gets in the way.
>>
>
> That is because your CPU has encryption features - the QNAP devices
> largely do not; I replaced the CPU in mine with one that had encryption
> features because otherwise there was nothing that could bring the
> performance above about 80MB/sec
>
>
> Once I put in a CPU supporting AESNI I could get up to about 500MB/sec -
> and this was still not CPU bound
Yes, of course. I forgot about the dedicated storage device rather than
a general server. I run dmcrypt on a WD mybook live and get about 8MB/s
on that (which is enough for what I need).
next prev parent reply other threads:[~2013-07-05 3:06 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-04 18:30 some general questions on RAID Christoph Anton Mitterer
2013-07-04 22:07 ` Phil Turmel
2013-07-04 23:34 ` Christoph Anton Mitterer
2013-07-08 4:48 ` NeilBrown
2013-07-06 1:33 ` Christoph Anton Mitterer
2013-07-06 8:52 ` Stan Hoeppner
2013-07-06 15:15 ` Christoph Anton Mitterer
2013-07-07 16:51 ` Stan Hoeppner
2013-07-07 17:39 ` Milan Broz
2013-07-07 18:01 ` Christoph Anton Mitterer
2013-07-07 18:50 ` Milan Broz
2013-07-07 20:51 ` Christoph Anton Mitterer
2013-07-08 5:40 ` Milan Broz
2013-07-08 4:53 ` NeilBrown
2013-07-08 5:25 ` Milan Broz
2013-07-05 1:13 ` Brad Campbell
2013-07-05 1:39 ` Sam Bingner
2013-07-05 3:06 ` Brad Campbell [this message]
2013-07-06 1:23 ` some general questions on RAID (OT) Christoph Anton Mitterer
2013-07-06 6:23 ` Sam Bingner
2013-07-06 15:11 ` Christoph Anton Mitterer
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