I''d like to snapshot a domU at any time to have a checkpoint of the domain. Actually I only need the partitions saved, not the domU. I''d do this now by shuting down the domain, hence the fs are umounted and then dd/partimage the partitions. its not perfect, because I have around one minute downtime and actually a shutdown. If I see the xen migrate/save of a domain, why not copy the domain with its disks ? Is - xm pause .. - xm save .. - dump saved_domU and its disks to a checkpoint - xm unpause - restore the checkpoint, shut it down and dump the disks an option, or how would you do that ? marcel _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> If I see the xen migrate/save of a domain, why not copy the > domain with its disks ?It easy to add this functionality, and its on the todo list. Because of the live migrate code in xc_linux_save, it will be possible to take a checkpoint of a domain without actually stopping it (well, probably not for more than a few 10s of ms). The only difficulty (which is why we haven''t done it yet) is that it requires a bit of co-ordination with LVM to create a snapshot of the VM''s file system at the synchronization point. This require a bit of xend hacking to invoke LVM at the appropriate point. No more than a couple of hours work for someone that knows xend. (It''s probably best to have xm checkpoint receive the name of the LVM volume it should snapshot the filesystem to on the command line, to avoid having to worry about allocaitng one). Ian _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users