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Re: [Qemu-devel] 'qemu-nbd' explicit flush

From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] 'qemu-nbd' explicit flush
Date: Fri, 24 May 2013 11:06:14 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Thu, May 23, 2013 at 11:35:24PM +0000, Mark Trumpold wrote:
> I had one question I forgot to ask..
> Is it possible to switch from '--cache=writeback' functionality
> to '--cache=writethrough' (and visa versa) while qemu-nbd is
> connected to the '/dev/nbd<x>' device?

No.  The block layer APIs to do that are available in QEMU but qemu-nbd
doesn't have run-time cache mode changing.


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