From: Paolo Bonzini <pbonzini@redhat.com>
To: Zhang Haoyu <zhanghy@sangfor.com.cn>,
qemu-devel <qemu-devel@nongnu.org>, kvm <kvm@vger.kernel.org>
Cc: Fam Zheng <famz@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [question] incremental backup a running vm
Date: Wed, 21 Jan 2015 11:39:44 +0100 [thread overview]
Message-ID: <54BF81F0.9070908@redhat.com> (raw)
In-Reply-To: <201501211832330964659@sangfor.com.cn>
On 21/01/2015 11:32, Zhang Haoyu wrote:
> Hi,
>
> Does drive_mirror support incremental backup a running vm?
> Or other mechanism does?
>
> incremental backup a running vm requirements:
> First time backup, all of the allocated data will be mirrored to destination,
> then a copied bitmap will be saved to a file, then the bitmap file will log dirty for
> the changed data.
> Next time backup, only the dirty data will be mirrored to destination.
> Even the VM shutdown and start after several days,
> the bitmap will be loaded while starting vm.
> Any ideas?
Drive-mirror is for storage migration. For backup there is another job,
drive-backup. drive-backup copies a point-in-time snapshot of one or
more disks corresponding to when the backup was started.
Incremental backup is being worked on. You can see patches on the list.
Paolo
next prev parent reply other threads:[~2015-01-21 10:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-21 10:32 [Qemu-devel] [question] incremental backup a running vm Zhang Haoyu
2015-01-21 10:39 ` Paolo Bonzini [this message]
2015-01-22 23:29 ` Kashyap Chamarthy
2015-01-26 1:07 ` Zhang Haoyu
2015-01-26 9:29 ` Paolo Bonzini
2015-01-26 11:13 ` Zhang Haoyu
2015-01-26 11:28 ` Paolo Bonzini
2015-01-26 12:25 ` Zhang Haoyu
2015-01-23 11:09 ` Kashyap Chamarthy
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