This helps services, but as some point you have to run a database layer too ;) Cassandra helps, but it's not the whole story during large-scale close together r

This helps services, but as some point you have to run a database layer too ;) Cassandra helps, but it's not the whole story during large-scale close together reboots like these. It ends up being a decent bit of manual operator time spent when security patches force AWS to reboot. You have to be pretty careful about any service that can't lose members as quickly due to bootstrap times or technology limitations, e.g. RDBMSes. For things running in an ASG, it's trivial to let it die or just kill it.