Just rebooting a machine with ephemeral drives is ok (it does an os level reboot). You will also keep the same IP address. If you stop and then start a machine with ephemeral drives you will lose data.
See: http://alestic.com/2011/09/ec2-reboot-stop-start On Wed, Dec 7, 2011 at 6:43 PM, Stephen McKamey <step...@mckamey.com> wrote: > I just received an email from AWS about rebooting my EC2 instance for > maintenance. Thankfully this is just my webhead, but I'm curiousĀ haveĀ others > experienced this with a Cassandra instance? > > http://aws.amazon.com/maintenance-help/ > > The details seem to say that if you allow them to do the reboot for you then > your instance data will remain intact (as opposed to if you do it yourself). > Has anyone experienced this to verify? > > Thanks, > Stephen