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#9 Re: Backing Up/Restoring Package Information? Posted by i_mac (205.150.xx.xx) on Wed 2 Nov 2005 at 17:19 Hey there, Rsync, with Olivier's traditional approach, and caveats for specific apps/mounts/sesions is great. There is something more advanced, and may not be ready for non-power users of Debian. Official Debian sources are not up to date, but I expect Etch to have v2.X support, if not 3.x. I run 2.0.7 on Sarge currently, and now farm out virtual machines for all sorts of tasks/friends/etc. It provides a <10ms transfer of of a running box to new iron on the same subnet if you have a network card that can swich MAC addresses (i.e. DEC/Tulip) to allow for the instant layer-2 switch transistion of live traffic. For people with NIC's that can't change their MAC, the transfer requires a pause equivalent to a bridge topology change, or in the case of slower interconnects, how fast you can sync up the memory. You can Pause -> Transfer -> Start for a worst case scenario. Syncing the data depends on your setup (disk image from a file, shared storage/SAN, nfs mount) Anyhow, its the Xen virtual machine monitor. (xen.sf.net). I have multiple webservers running on xen domains, and I can move 'em around as I please. Run your servers in a Xen domain (which is identical package-wise to a real machine) and your hot failover is a synch. HTML Blurb on how the Live transfer of hot iron here: http://www.cl.cam.ac.uk/Research/SRG/netos/xen/readmes/user/user.html#SECTION02430000000000000000 Information on Debian packages here: http://wiki.xensource.com/xenwiki/DebianPackageMaintenance A Google summer of code project created the latest debs (Up to kernel-soruce-2.6.11 for sarge); I hope to see linux-patch-xen for the linux-source-2.6.14 series kernels soon. Well that's enough info to get interested parties going. Back to my GNU/Solaris project...

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