From: Phillip Susi <psusi@cfl.rr.com>
To: Arne Jansen <sensille@gmx.net>
Cc: Thomas Schmidt <Schmidt-T@gmx.de>, linux-btrfs@vger.kernel.org
Subject: Re: [RFC] improve space utilization on off-sized raid devices
Date: Thu, 17 Nov 2011 13:27:41 -0500 [thread overview]
Message-ID: <4EC5521D.1020209@cfl.rr.com> (raw)
In-Reply-To: <4EC5052E.4040709@gmx.net>
On 11/17/2011 7:59 AM, Arne Jansen wrote:
> Right you are. So you want to sacrifice stripe size for space efficiency.
> Why don't you just use RAID1?
> Instead of reducing the stripe size for the majority of writes, I'd prefer
> to allow RAID10 to go down to 2 disks. This should also solve it.
Yes, it appears that btrfs's current idea of raid10 is actually raid0+1,
not raid10. If it were proper raid10, it could use the remaining space
on the 3 larger disks for a raid10 metadata chunk.
prev parent reply other threads:[~2011-11-17 18:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-17 0:27 [RFC] improve space utilization on off-sized raid devices Thomas Schmidt
2011-11-17 7:42 ` Arne Jansen
2011-11-17 11:53 ` Thomas Schmidt
2011-11-17 12:59 ` Arne Jansen
2011-11-17 14:06 ` Thomas Schmidt
2011-12-01 8:55 ` Arne Jansen
2012-01-24 17:15 ` THomas Schmidt
2012-01-24 21:01 ` Thomas Schmidt
2011-11-17 18:27 ` Phillip Susi [this message]
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