Distributed Replicated Block Device (DRBD) development
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From: Lars Ellenberg <lars.ellenberg@linbit.com>
To: drbd-dev@lists.linbit.com
Subject: Re: [Drbd-dev] switching between protocols A and C
Date: Wed, 11 Apr 2007 14:57:16 +0200	[thread overview]
Message-ID: <20070411125716.GC27110@barkeeper1.linbit> (raw)
In-Reply-To: <461CD0EC.4040402@dcs.gla.ac.uk>

On Wed, Apr 11, 2007 at 01:13:32PM +0100, Cristian Zamfir wrote:
> 
> Hi,
> 
> Would it be possible to switch from protocol A to C and vice versa 
> without disconnecting (for instance detach, switch protocol and re-attach)?
> 
> This would be useful when alternating between two primaries (only 
> protocol C can be used) and a primary/secondary configuration where 
> protocol A may increase write throughput on the primary node.

protocol A does _NOT_ increase throughput at all.
it _MAY_ reduce latency somewhat sometimes.

> Right now this behaviour does not seem to be supported but I am 
> interested if you consider it could be implemented easily.

no. and it does not make much sense for me, either.

-- 
: Lars Ellenberg                            Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH      Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe    http://www.linbit.com :
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  reply	other threads:[~2007-04-11 12:57 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-11 12:13 [Drbd-dev] switching between protocols A and C Cristian Zamfir
2007-04-11 12:57 ` Lars Ellenberg [this message]
2007-04-11 13:46   ` Cristian Zamfir
2007-04-11 14:51     ` Lars Ellenberg
2007-04-11 15:04       ` Cristian Zamfir
2007-04-11 15:57         ` Lars Ellenberg

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