Hi all, Where could I find the memory dump and disk snapshots for vm after command "virsh snapshot-create <some_running_vm>"? Thanks in advance. I found the xml files in /var/lib/libvirt/qemu/snapshot/, but hava no idea about the raw snapshot file. Thanks, Lei -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20120606/8c36ad04/attachment.htm>
On 06/06/2012 03:20 AM, SimpleCloud wrote:> Hi all, > > > Where could I find the memory dump and disk snapshots for vm after command "virsh snapshot-create <some_running_vm>"? Thanks in advance.This particular form of snapshot is called the 'system checkpoint' snapshot, and the current qemu implementation is that the snapshot creates internal snapshots in your qcow2 files. If you do 'qemu-img info $path_to_img', you will see the disk snapshots listed as internal snapshots for each image associated with the domain, as well as the first qcow2 file also having memory associated with the internal snapshot.> > > I found the xml files in /var/lib/libvirt/qemu/snapshot/, but hava no idea about the raw snapshot file.Looking in /var/lib/libvirt is generally unsupported (that is an internal libvirt detail, and subject to change in future releases). The only way to safely look at the snapshot XML is via the API (virDomainSnapshotGetXMLDesc, which is wrapped by 'virsh snapshot-dumpxml'). I am also hoping to submit a patch that will allow you the option to create an external snapshot rather than using qcow2 internal snapshots, but that's not in the code base yet. -- Eric Blake eblake at redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 620 bytes Desc: OpenPGP digital signature URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20120606/67cc16bd/attachment.sig>
Thanks a lot for the details. From http://wiki.libvirt.org/page/Snapshots, we have to pause the domain before taking snapshot and resume after. Is there any way to do "live" snapshotting for running domain or reduce pause time? Thanks, Lei ------------------ Original ------------------ From: "Eric Blake"<eblake at redhat.com>; Date: Wed, Jun 6, 2012 08:24 PM To: "SimpleCloud"<simplecloud at qq.com>; Cc: "libvirt-users"<libvirt-users at redhat.com>; Subject: Re: [libvirt-users] The default location of vm snapshots On 06/06/2012 03:20 AM, SimpleCloud wrote:> Hi all, > > > Where could I find the memory dump and disk snapshots for vm after command "virsh snapshot-create <some_running_vm>"? Thanks in advance.This particular form of snapshot is called the 'system checkpoint' snapshot, and the current qemu implementation is that the snapshot creates internal snapshots in your qcow2 files. If you do 'qemu-img info $path_to_img', you will see the disk snapshots listed as internal snapshots for each image associated with the domain, as well as the first qcow2 file also having memory associated with the internal snapshot.> > > I found the xml files in /var/lib/libvirt/qemu/snapshot/, but hava no idea about the raw snapshot file.Looking in /var/lib/libvirt is generally unsupported (that is an internal libvirt detail, and subject to change in future releases). The only way to safely look at the snapshot XML is via the API (virDomainSnapshotGetXMLDesc, which is wrapped by 'virsh snapshot-dumpxml'). I am also hoping to submit a patch that will allow you the option to create an external snapshot rather than using qcow2 internal snapshots, but that's not in the code base yet. -- Eric Blake eblake at redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20120606/dbb53f08/attachment.htm>