From: Paolo Bonzini <pbonzini@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Wolfgang Richter <wolf@cs.cmu.edu>,
qemu-devel <qemu-devel@nongnu.org>,
stefanha <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [RFC] block-trace Low Level Command Supporting Disk Introspection
Date: Tue, 14 May 2013 12:04:32 +0200 [thread overview]
Message-ID: <51920C30.4050407@redhat.com> (raw)
In-Reply-To: <20130514085046.GA2556@dhcp-200-207.str.redhat.com>
Il 14/05/2013 10:50, Kevin Wolf ha scritto:
> Or, to translate it into our existing terminology, drive-mirror
> implements a passive mirror, you're proposing an active one (which we
> do want to have).
>
> With an active mirror, we'll want to have another choice: The mirror can
> be synchronous (guest writes only complete after the mirrored write has
> completed) or asynchronous (completion is based only on the original
> image). It should be easy enough to support both once an active mirror
> exists.
Right, I'm waiting for Stefan's block-backup to give me the "right"
hooks for the active mirror.
The bulk phase will always be passive, but an active-asynchronous mirror
has some interesting properties and it makes sense to implement it.
Paolo
next prev parent reply other threads:[~2013-05-14 10:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-13 21:21 [Qemu-devel] [RFC] block-trace Low Level Command Supporting Disk Introspection Wolfgang Richter
2013-05-14 8:40 ` Stefan Hajnoczi
2013-05-14 15:42 ` Wolfgang Richter
2013-05-14 8:50 ` Kevin Wolf
2013-05-14 10:04 ` Paolo Bonzini [this message]
2013-05-14 15:48 ` Wolfgang Richter
2013-05-14 16:45 ` Paolo Bonzini
2013-05-14 19:30 ` Wolfgang Richter
2013-05-15 7:59 ` Kevin Wolf
2013-05-15 8:25 ` Paolo Bonzini
2013-05-15 8:53 ` Kevin Wolf
2013-05-15 9:16 ` Paolo Bonzini
2013-05-15 9:46 ` Kevin Wolf
2013-05-15 11:54 ` Paolo Bonzini
2013-05-22 15:46 ` Wolfgang Richter
2013-05-14 15:45 ` Wolfgang Richter
2013-05-16 13:44 ` Richard W.M. Jones
2013-05-22 15:51 ` Wolfgang Richter
2013-05-22 16:11 ` Paolo Bonzini
2013-05-22 16:29 ` Wolfgang Richter
2013-05-22 16:42 ` Richard W.M. Jones
2013-05-22 18:32 ` Wolfgang Richter
2013-05-22 19:26 ` Richard W.M. Jones
2013-05-22 19:38 ` Wolfgang Richter
2013-05-22 20:47 ` Richard W.M. Jones
2013-05-22 21:46 ` Paolo Bonzini
2013-05-23 7:50 ` Stefan Hajnoczi
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