From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: Peter Rabbitson <rabbit+list@rabbit.us>
Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
xfs@oss.sgi.com
Subject: Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++)
Date: Wed, 28 May 2008 07:05:02 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.1.10.0805280703400.23383@p34.internal.lan> (raw)
In-Reply-To: <483D39D3.4020906@rabbit.us>
On Wed, 28 May 2008, Peter Rabbitson wrote:
> Justin Piszcz wrote:
>> Hardware:
>>
>> 1. Utilized (6) 400 gigabyte sata hard drives.
>> 2. Everything is on PCI-e (965 chipset & a 2port sata card)
>>
>> Used the following 'optimizations' for all tests.
>>
>> # Set read-ahead.
>> echo "Setting read-ahead to 64 MiB for /dev/md3"
>> blockdev --setra 65536 /dev/md3
>
> That's actually 65k x 512byte blocks so 32MiB
Ah whoops, thanks!
> Results are meaningless without a crucial detail - what was the chunk size
> used during array creation time? Otherwise interesting test :)
Indeed, the chunk size used was 256 KiB for all tests.
Justin.
next prev parent reply other threads:[~2008-05-28 11:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-28 8:53 Justin Piszcz
2008-05-28 10:54 ` Peter Rabbitson
2008-05-28 11:05 ` Justin Piszcz [this message]
2008-05-28 15:40 ` Chris Snook
2008-05-28 17:32 ` Justin Piszcz
2008-05-28 17:53 ` Justin Piszcz
2008-05-28 19:22 ` Chris Snook
2008-05-28 19:27 ` Justin Piszcz
2008-05-29 9:57 ` Kasper Sandberg
2008-05-29 21:08 ` Justin Piszcz
2008-05-28 16:34 ` Jens Bäckman
2008-05-28 16:40 ` Chris Snook
2008-05-28 16:46 ` Bryan Mesich
2008-05-28 17:33 ` Justin Piszcz
2008-05-28 18:57 ` Alan Cox
2008-05-28 23:00 ` Bill Davidsen
2008-05-29 11:22 ` Alan Cox
2008-05-30 12:22 ` Bill Davidsen
2008-05-28 19:02 ` Keld Jørn Simonsen
2008-05-28 19:05 ` Justin Piszcz
2008-05-28 23:09 ` Bill Davidsen
2008-05-29 6:37 ` Michal Soltys
2008-05-29 6:44 ` Holger Kiehl
2008-05-29 12:06 ` Justin Piszcz
2008-05-29 17:02 ` Justin Piszcz
2008-05-30 12:55 ` Bill Davidsen
2008-05-30 14:23 ` Keld Jørn Simonsen
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=alpine.DEB.1.10.0805280703400.23383@p34.internal.lan \
--to=jpiszcz@lucidpixels.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-raid@vger.kernel.org \
--cc=rabbit+list@rabbit.us \
--cc=xfs@oss.sgi.com \
/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
all inboxes | Powered by JetHome®