From: Dave Chinner <david@fromorbit.com>
To: Emmanuel Florac <eflorac@intellique.com>
Cc: Ewen McNeill <xfs@ewen.mcneill.gen.nz>, linux-xfs@vger.kernel.org
Subject: Re: Rationale for hardware RAID 10 su, sw values in FAQ
Date: Thu, 28 Sep 2017 21:07:19 +1000 [thread overview]
Message-ID: <20170928110719.GJ10621@dastard> (raw)
In-Reply-To: <20170928125310.5687097e@harpe.intellique.com>
On Thu, Sep 28, 2017 at 12:53:10PM +0200, Emmanuel Florac wrote:
> Le Thu, 28 Sep 2017 12:36:39 +1300
> Ewen McNeill <xfs@ewen.mcneill.gen.nz> écrivait:
>
> > I'm obviously not an expert in filesystem layout optimisation. But I
> > have many years sysadmin experience dealing with lots of types of
> > storage, and can write a couple of pages of text on the "background"
> > bits next time I have a free moment. The more advanced tunables
> > could remain "todo" until there's time for the perfect version...
> >
>
> As you're at it, please mention the potential problems with 512e (512
> bytes blocks emulated) disks, which are the vast majority of shipped
> disks nowadays. Doing RAID with these can lead to all sort of trouble
> by worsening the read/modify/write problem.
That's not a filesystem problem, though. Answering questions like
"what is the optimal device sector size for RAID on some random
storage hardware" is quite a long way outside the scope the
filesystem configuration guidelines....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2017-09-28 11:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-26 8:54 Rationale for hardware RAID 10 su, sw values in FAQ Ewen McNeill
2017-09-27 0:43 ` Dave Chinner
2017-09-27 1:56 ` Ewen McNeill
2017-09-27 4:33 ` Dave Chinner
2017-09-27 23:36 ` Ewen McNeill
2017-09-28 1:39 ` Dave Chinner
2017-09-28 10:53 ` Emmanuel Florac
2017-09-28 11:07 ` Dave Chinner [this message]
2017-12-19 2:19 ` Ewen McNeill
2017-12-20 22:29 ` Dave Chinner
2018-02-06 1:56 ` Storage considerations for XFS layout documentation (was Re: Rationale for hardware RAID 10 su, sw values in FAQ) Ewen McNeill
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=20170928110719.GJ10621@dastard \
--to=david@fromorbit.com \
--cc=eflorac@intellique.com \
--cc=linux-xfs@vger.kernel.org \
--cc=xfs@ewen.mcneill.gen.nz \
/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.