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Re: [Xen-users] Hot backup vs (local) live migration
| To: | xen-users@xxxxxxxxxxxxxxxxxxx |
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| Subject: | Re: [Xen-users] Hot backup vs (local) live migration |
| From: | Tom Brown <xensource.com@xxxxxxxxxxxxxxxxxxx> |
| Date: | Wed, 25 Jul 2007 09:34:42 -0700 (PDT) |
| Delivery-date: | Wed, 25 Jul 2007 09:32:26 -0700 |
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On Tue, 24 Jul 2007, Claris Castillo wrote: Hi, this is the third time I post this question to the list but I have not received any response. It is not clear to me why the live migration technique used by Xen and documented at http://www.cl.cam.ac.uk/research/srg/netos/papers/2005-migration-nsdi-pre.pdf can't be used to perform a hot backup of a virtual machine. Based on the paper, just before shutting down and destroying the original VM, there is an exact clone of it in the remote/destination host. I haven't looked at that PDF, but there's nothing magic about a migration. It copies the memory and CPU state of the guest. In short I copies everything you generally would not back up (memory and cpu state), and copies nothing that normally you would backup (no files have been copied). -Tom _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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