From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] Reconsidering default options for cryptsetup-reencrypt
Date: Fri, 23 Nov 2012 10:27:42 +0100 [thread overview]
Message-ID: <20121123092740.GA15419@tansi.org> (raw)
In-Reply-To: <50AF3B3F.9000508@gmail.com>
On Fri, Nov 23, 2012 at 10:00:47AM +0100, Milan Broz wrote:
> On 11/23/2012 07:07 AM, Arno Wagner wrote:
>
> > I think you do. I also think that HW raid is a bit exotic on Linux
> > these days, as SW RAID gives better features and often better
> > performance.
>
> If you work in enterprise environment, this is definitely not true :)
It depends. I have used a 12-way SAS RAID controller as
dumb controller with software-RAID and have gotten better
results. But that was one with Linux support that sucked.
With good Linux support, that may be entirely different.
On the exotic, I agree that in enterprise environments
HW controllers are the norm, but I think by now that is
mainly because they are simpler to use.
> And for some strange reasons, cloud environments are more
> and more popular where "elastic" storage means usually some
> virtualized HW storage array.
Ah, yes. The "cloud" stuff, where all your data turns into
hot vapor. I really do not get why people think using
even more complex environments that they do not even fully
control is a good idea when we obviously have not even mastered
simpler systems...
> Also there are SSD drives which uses internally RAID0 to speed
> up operations (in reality it is more independent SSD drives inside).
Ok, but I think _that_ does not count, unless you know of some
that expose the controller. ;-)
Arno
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@wagner.name
GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718
----
One of the painful things about our time is that those who feel certainty
are stupid, and those with any imagination and understanding are filled
with doubt and indecision. -- Bertrand Russell
next prev parent reply other threads:[~2012-11-23 9:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 4:12 [dm-crypt] Reconsidering default options for cryptsetup-reencrypt Karol Babioch
2012-11-23 6:07 ` Arno Wagner
2012-11-23 9:00 ` Milan Broz
2012-11-23 9:27 ` Arno Wagner [this message]
2012-11-23 9:42 ` Milan Broz
2012-11-24 17:01 ` Sven Eschenberg
2012-11-24 20:59 ` Milan Broz
2012-12-03 0:27 ` DarKRaveR
2012-11-23 8:49 ` Milan Broz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20121123092740.GA15419@tansi.org \
--to=arno@wagner.name \
--cc=dm-crypt@saout.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox