From: Kasper Sandberg <postmaster@metanurb.dk>
To: linux-raid@vger.kernel.org
Subject: raid10 layout for 2xSSDs
Date: Mon, 16 Nov 2009 15:29:05 +0100 [thread overview]
Message-ID: <1258381745.31633.35.camel@localhost> (raw)
Hello.
I've been wanting to create a raid10 array of two SSDs, and I am
currently considering the layout.
As i understand it, near layout is similar to raid1, and will only
provide a speedup if theres 2 reads at the same time, not a single
sequential read.
so the choice is really between far and offset. As i see it, the
difference is, that offset tries to reduce the seeking for writing
compared to far, but that if you dont consider the seeking penalty,
average sequential write speed across the entire array should be roughly
the same with offset and far, with offset perhaps being a tad more
"stable", is this a correct assumption? if it is, that would mean offset
provides a higher "garantueed" speed than far, but with a lower maximum
speed.
mvh.
Kasper Sandberg
next reply other threads:[~2009-11-16 14:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-16 14:29 Kasper Sandberg [this message]
2009-11-16 15:26 ` raid10 layout for 2xSSDs Goswin von Brederlow
2009-11-16 16:13 ` Keld Jørn Simonsen
2009-11-17 4:34 ` Goswin von Brederlow
2009-11-17 15:05 ` Kasper Sandberg
2009-11-16 16:31 ` Robin Hill
2009-11-16 16:38 ` Christopher Chen
2009-11-16 16:52 ` Robin Hill
2009-11-17 4:36 ` Goswin von Brederlow
2009-11-16 16:08 ` Christopher Chen
2009-11-16 21:02 ` Kasper Sandberg
2009-11-16 21:19 ` Majed B.
2009-11-16 21:33 ` Kasper Sandberg
2009-11-17 4:46 ` Goswin von Brederlow
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=1258381745.31633.35.camel@localhost \
--to=postmaster@metanurb.dk \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).