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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.