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From: Kent Overstreet <kmo-PEzghdH756F8UrSeD/g0lQ@public.gmane.org>
To: Adam Brenner <aebrenne-sXc7qaQca9o@public.gmane.org>,
	g2p.code-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Cc: linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Converting existing partition to bcache backing device without loss of data
Date: Thu, 8 Aug 2013 17:36:57 -0700	[thread overview]
Message-ID: <20130809003657.GF15409@kmo-pixel> (raw)
In-Reply-To: <CAO9TOLddUrQCSchv_2-Xf=xjp_AOfN+NyePMPfiQYwqA+gx4ew-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On Thu, Aug 08, 2013 at 09:27:33AM -0700, Adam Brenner wrote:
> Howdy,
> 
> I am in the process of testing bcache on our HPC cluster to act as
> cache for our gluster storage (~750TB).
> 
> I notice that during the setup process on our test cluster, our
> backing device (where all our data is stored) will need to be
> formatted in order to support bcache.
> 
> Does a way exist so we do not have to format our backing device? Or is
> working being done to support this?

Unfortunately, there's no general purpose way - the faq explains why (I
just fixed the wiki so it's there again :)

http://bcache.evilpiepirate.org/FAQ/

However, Gabriel de Perthuis has a tool to do in place conversion - I
can't remember if it was limited to lvm devices or not - Gabriel, what
was the link to that again? I should stick a link to it in the wiki or
give you an account on it so you can.

  parent reply	other threads:[~2013-08-09  0:36 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-08 16:27 Converting existing partition to bcache backing device without loss of data Adam Brenner
     [not found] ` <CAO9TOLddUrQCSchv_2-Xf=xjp_AOfN+NyePMPfiQYwqA+gx4ew-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-08-09  0:29   ` Jason Warr
2013-08-09  0:36   ` Kent Overstreet [this message]
2013-08-09  1:00     ` Gabriel de Perthuis

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