On Mon, Sep 16, 2013 at 5:31 AM, Michael Still <[email protected]> wrote:
> On Fri, Sep 13, 2013 at 7:51 AM, Dolph Mathews <[email protected]> > wrote: > > > ++ Data backups are a solved problem, and no DB admin should trust an > > application to perform its own backups. > > I'm not completely sure I agree. Consider the case where a cloud with > active users undertakes an upgrade. The migrations run, and they allow > user traffic to hit the installation. They then discover there is a > serious problem and now need to rollback. However, they can't just > restore a database backup, because the database is no longer in a > consistent state compared with the hypervisors -- users might have > created or deleted instances for example. > In this scenario if we could downgrade reliably, they could force a > downgrade with db sync, and then revert the packages they had > installed to the previous version. > > How would they handle this scenario with just database backups? > Great point, but I still wouldn't *rely* on an application to manage it's own data backups :) > > Michael > > -- > Rackspace Australia > > _______________________________________________ > OpenStack-dev mailing list > [email protected] > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > -- -Dolph
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