From: Stan Hoeppner <stan@hardwarefreak.com>
To: David Brown <david.brown@hesbynett.no>
Cc: linux-raid@vger.kernel.org
Subject: Re: high throughput storage server?
Date: Wed, 16 Feb 2011 18:45:02 -0600 [thread overview]
Message-ID: <4D5C6F8E.9020802@hardwarefreak.com> (raw)
In-Reply-To: <ijhpv7$o84$1@dough.gmane.org>
David Brown put forth on 2/16/2011 6:26 PM:
> On 17/02/11 00:32, Stan Hoeppner wrote:
>> RAID level space/cost efficiency from a TCO standpoint is largely irrelevant
>> today due to the low price of mech drives. Using the SATABeast as an example,
>> the cost per TB of a 20TB RAID 10 is roughly $1600/TB and a 20TB RAID 6 is about
>> $1200/TB. Given all the advantages of RAID 10 over RAID 6 the 33% premium is
>> more than worth it.
> I don't think it is fair to give general rules like that. In this particular
The IT press does it every day. CTOs read those articles. In many cases it's
their primary source of information. Speak in terms CTOs (i.e. those holding
the purse) understand.
> case, that might be how the sums work out. But in other cases, using RAID 10
> instead of RAID 6 might mean stepping up in chassis or controller size and
> costs. Also remember that RAID 10 is not better than RAID 6 in every way - a
> RAID 6 array will survive any two failed drives, while with RAID 10 an unlucky
> pairing of failed drives will bring down the whole raid. Different applications
> require different balances here.
I'm not sure about being "fair" but it directly relates to the original question
that started this thread. The OP wanted performance and space with a preference
for performance. This demonstrates he can get the performance for a ~33% cost
premium. He didn't mention a budget limit, only that most vendor figures were
too high.
Also, you're repeating points I've made in this (and other) threads back to me.
Try to keep up David. ;)
--
Stan
next prev parent reply other threads:[~2011-02-17 0:45 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-14 23:59 high throughput storage server? Matt Garman
2011-02-15 2:06 ` Doug Dumitru
2011-02-15 4:44 ` Matt Garman
2011-02-15 5:49 ` hansbkk
2011-02-15 9:43 ` David Brown
2011-02-24 20:28 ` Matt Garman
2011-02-24 20:43 ` David Brown
2011-02-15 15:16 ` Joe Landman
2011-02-15 20:37 ` NeilBrown
2011-02-15 20:47 ` Joe Landman
2011-02-15 21:41 ` NeilBrown
2011-02-24 20:58 ` Matt Garman
2011-02-24 21:20 ` Joe Landman
2011-02-26 23:54 ` high throughput storage server? GPFS w/ 10GB/s throughput to the rescue Stan Hoeppner
2011-02-27 0:56 ` Joe Landman
2011-02-27 14:55 ` Stan Hoeppner
2011-03-12 22:49 ` Matt Garman
2011-02-27 21:30 ` high throughput storage server? Ed W
2011-02-28 15:46 ` Joe Landman
2011-02-28 23:14 ` Stan Hoeppner
2011-02-28 22:22 ` Stan Hoeppner
2011-03-02 3:44 ` Matt Garman
2011-03-02 4:20 ` Joe Landman
2011-03-02 7:10 ` Roberto Spadim
2011-03-02 19:03 ` Drew
2011-03-02 19:20 ` Roberto Spadim
2011-03-13 20:10 ` Christoph Hellwig
2011-03-14 12:27 ` Stan Hoeppner
2011-03-14 12:47 ` Christoph Hellwig
2011-03-18 13:16 ` Stan Hoeppner
2011-03-18 14:05 ` Christoph Hellwig
2011-03-18 15:43 ` Stan Hoeppner
2011-03-18 16:21 ` Roberto Spadim
2011-03-18 22:01 ` NeilBrown
2011-03-18 22:23 ` Roberto Spadim
2011-03-20 1:34 ` Stan Hoeppner
2011-03-20 3:41 ` NeilBrown
2011-03-20 5:32 ` Roberto Spadim
2011-03-20 23:22 ` Stan Hoeppner
2011-03-21 0:52 ` Roberto Spadim
2011-03-21 2:44 ` Keld Jørn Simonsen
2011-03-21 3:13 ` Roberto Spadim
2011-03-21 3:14 ` Roberto Spadim
2011-03-21 17:07 ` Stan Hoeppner
2011-03-21 14:18 ` Stan Hoeppner
2011-03-21 17:08 ` Roberto Spadim
2011-03-21 22:13 ` Keld Jørn Simonsen
2011-03-22 9:46 ` Robin Hill
2011-03-22 10:14 ` Keld Jørn Simonsen
2011-03-23 8:53 ` Stan Hoeppner
2011-03-23 15:57 ` Roberto Spadim
2011-03-23 16:19 ` Joe Landman
2011-03-24 8:05 ` Stan Hoeppner
2011-03-24 13:12 ` Joe Landman
2011-03-25 7:06 ` Stan Hoeppner
2011-03-24 17:07 ` Christoph Hellwig
2011-03-24 5:52 ` Stan Hoeppner
2011-03-24 6:33 ` NeilBrown
2011-03-24 8:07 ` Roberto Spadim
2011-03-24 8:31 ` Stan Hoeppner
2011-03-22 10:00 ` Stan Hoeppner
2011-03-22 11:01 ` Keld Jørn Simonsen
2011-02-15 12:29 ` Stan Hoeppner
2011-02-15 12:45 ` Roberto Spadim
2011-02-15 13:03 ` Roberto Spadim
2011-02-24 20:43 ` Matt Garman
2011-02-24 20:53 ` Zdenek Kaspar
2011-02-24 21:07 ` Joe Landman
2011-02-15 13:39 ` David Brown
2011-02-16 23:32 ` Stan Hoeppner
2011-02-17 0:00 ` Keld Jørn Simonsen
2011-02-17 0:19 ` Stan Hoeppner
2011-02-17 2:23 ` Roberto Spadim
2011-02-17 3:05 ` Stan Hoeppner
2011-02-17 0:26 ` David Brown
2011-02-17 0:45 ` Stan Hoeppner [this message]
2011-02-17 10:39 ` David Brown
2011-02-24 20:49 ` Matt Garman
2011-02-15 13:48 ` Zdenek Kaspar
2011-02-15 14:29 ` Roberto Spadim
2011-02-15 14:51 ` A. Krijgsman
2011-02-15 16:44 ` Roberto Spadim
2011-02-15 14:56 ` Zdenek Kaspar
2011-02-24 20:36 ` Matt Garman
2011-02-17 11:07 ` John Robinson
2011-02-17 13:36 ` Roberto Spadim
2011-02-17 13:54 ` Roberto Spadim
2011-02-17 21:47 ` Stan Hoeppner
2011-02-17 22:13 ` Joe Landman
2011-02-17 23:49 ` Stan Hoeppner
2011-02-18 0:06 ` Joe Landman
2011-02-18 3:48 ` Stan Hoeppner
2011-02-18 13:49 ` Mattias Wadenstein
2011-02-18 23:16 ` Stan Hoeppner
2011-02-21 10:25 ` Mattias Wadenstein
2011-02-21 21:51 ` Stan Hoeppner
2011-02-22 8:57 ` David Brown
2011-02-22 9:30 ` Mattias Wadenstein
2011-02-22 9:49 ` David Brown
2011-02-22 13:38 ` Stan Hoeppner
2011-02-22 14:18 ` David Brown
2011-02-23 5:52 ` Stan Hoeppner
2011-02-23 13:56 ` David Brown
2011-02-23 14:25 ` John Robinson
2011-02-23 15:15 ` David Brown
2011-02-23 23:14 ` Stan Hoeppner
2011-02-24 10:19 ` David Brown
2011-02-23 21:59 ` Stan Hoeppner
2011-02-23 23:43 ` John Robinson
2011-02-24 15:53 ` Stan Hoeppner
2011-02-23 21:11 ` Stan Hoeppner
2011-02-24 11:24 ` David Brown
2011-02-24 23:30 ` Stan Hoeppner
2011-02-25 8:20 ` David Brown
2011-02-19 0:24 ` Joe Landman
2011-02-21 10:04 ` Mattias Wadenstein
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=4D5C6F8E.9020802@hardwarefreak.com \
--to=stan@hardwarefreak.com \
--cc=david.brown@hesbynett.no \
--cc=linux-raid@vger.kernel.org \
/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.