From: NeilBrown <neilb@suse.de>
To: Chris Murphy <lists@colorremedies.com>
Cc: Vlad Dobrotescu <vlad@dobrotescu.ca>, linux-raid@vger.kernel.org
Subject: Re: RAID6 questions (mdadm 3.2.6/3.3.x)
Date: Sat, 12 Jul 2014 11:20:34 +1000 [thread overview]
Message-ID: <20140712112034.6b04d49f@notabene.brown> (raw)
In-Reply-To: <B953BC37-3769-4D9A-97FF-5EFE7C59EEA4@colorremedies.com>
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On Fri, 11 Jul 2014 19:09:48 -0600 Chris Murphy <lists@colorremedies.com>
wrote:
> > 7. I am sure I read somewhere (can't find the source anymore) that the "new" RAID features of LVM2 are based on a fork from the md code. If this is true, are you guys are contributing to that project as well?
>
> It's a good question, I'm not certain but my understanding is device mapper is leveraging existing md code in the kernel, rather than having forked and duplicated that code. They have their own user space tools and on-disk metadata so you can't use mdadm to manage it.
Your understanding is correct. It is the same code for managing RAID
functionality, but different code for managing metadata and different
user-space tools.
I'm hoping that one day the RAID support in LVM2 will be better than mdadm,
and then I can just fade away and no-one will notice that I am gone.
http://downatthirdman.files.wordpress.com/2010/06/grinning-chesire-cat.jpg
NeilBrown
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next prev parent reply other threads:[~2014-07-12 1:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-11 22:41 RAID6 questions (mdadm 3.2.6/3.3.x) Vlad Dobrotescu
2014-07-12 1:09 ` Chris Murphy
2014-07-12 1:20 ` NeilBrown [this message]
2014-07-12 3:21 ` Vlad Dobrotescu
2014-07-13 3:15 ` NeilBrown
2014-07-13 6:07 ` Vlad Dobrotescu
2014-07-12 12:29 ` Piergiorgio Sartor
2014-07-12 3:20 ` Vlad Dobrotescu
2014-07-12 3:46 ` Chris Murphy
2014-07-12 13:30 ` Vlad Dobrotescu
2014-07-12 14:46 ` Chris Murphy
2014-07-12 17:15 ` Vlad Dobrotescu
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