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Date: Wed, 08 Feb 2012 15:55:07 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [RFC PATCH] replication agent module
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To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>, =?UTF-8?B?16rXldee16gg15HXnyDXkNeV16g=?= <tomer@zertodata.com>, =?UTF-8?B?16LXldeT15Mg16fXk9ed?= <oded@zerto.com>, dlaor@redhat.com, qemu-devel@nongnu.org, Ori Mamluk <omamluk@zerto.com>, Yair Kuszpet <yairk@zerto.com>

On 02/08/2012 03:39 PM, Stefan Hajnoczi wrote:
>
>> >  What about taking the existing Ceph/RBD driver in QEMU and changing it to
>> >  support arbitrary image formats rather than just raw?  That sounds much much
>> >  easier.  The main advantage is that Ceph has a user-space library for use in
>> >  the replication hub.  It also supports snapshots.
> I missed how Ceph/RBD helps.  Can you explain how we would use it?

Ceph supports replication, you would just put images in a Ceph store 
rather than in a "normal" filesystem.

Paolo