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
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