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From: | Dor Laor |
Subject: | Re: [Qemu-devel] Re: KVM call agenda for Oct 19 |
Date: | Tue, 19 Oct 2010 14:48:56 +0200 |
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On 10/19/2010 04:11 AM, Chris Wright wrote:
* Juan Quintela (address@hidden) wrote:Please send in any agenda items you are interested in covering.- 0.13.X -stable handoff - 0.14 planning - threadlet work - virtfs proposals
- Live snapshots - We were asked to add this feature for external qcow2 images. Will simple approach of fsync + tracking each requested backing file (it can be per vDisk) and re-open the new image would be accepted? - Integration with FS freeze for consistent guest app snapshot Many apps do not sync their ram state to disk correctly or frequent enough. Physical world backup software calls fs freeze on xfs and VSS for windows to make the backup consistent. In order to integrated this with live snapshots we need a guest agent to trigger the guest fs freeze. We can either have qemu communicate with the agent directly through virtio-serial or have a mgmt daemon use virtio-serial to communicate with the guest in addition to QMP messages about the live snapshot state. Preferences? The first solution complicates qemu while the second complicates mgmt.
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