From: Paul Clements <paul.clements@steeleye.com>
To: jeff@jab.org
Cc: linux-raid@vger.kernel.org
Subject: Re: does chunksize matter in raid-1?
Date: Sat, 06 Aug 2005 08:44:49 -0400 [thread overview]
Message-ID: <42F4B0C1.1080306@steeleye.com> (raw)
In-Reply-To: <e03b90ae05080521077404ad09@mail.gmail.com>
Jeff Breidenbach wrote:
> Does chunk size matter *at all* for RAID-1?
>
> mdadm --create /dev/md0 --level=1 --chunk=8 /dev/sdc1 /dev/sdd1
> mdadm --create /dev/md0 --level=1 --chunk=128 /dev/sdc1 /dev/sdd1
>
> In my mental model of how RAID works, it can't possibly matter
> what my chunk size is whether I've got 1KB files or 1GB files because
> no striped reading occurs.
>
> Is my mental model wrong?
No, chunk size does not matter for raid1. In fact, some/most? kernels
will print a message to that effect if you specify a chunk size for a
raid1 array.
--
Paul
next prev parent reply other threads:[~2005-08-06 12:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-06 4:07 does chunksize matter in raid-1? Jeff Breidenbach
2005-08-06 12:44 ` Paul Clements [this message]
2005-08-06 17:47 ` J. Ryan Earl
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