* Greg Sabino Mullane <htamf...@gmail.com> [25/04/16 22:33]: > > Users find it a waste of resources to deploy 3 big PostgreSQL instances > > just for HA where 2 suffice even if they deploy 3 lightweight DCS > > instances. Having only some of the nodes act as DCS and others purely > > PostgreSQL nodes will reduce waste of resources. > > > > A big problem is that putting your DCS into Postgres means your whole > system is now super-sensitive to IO/WAL-streaming issues, and a busy > database doing database stuff is going to start affecting the DCS stuff.
Affecting in what way? Do you have a scenario in mind where an external state provider would act differently (better)? > With three lightweight DCS servers, you don't really need to worry about > how stressed the database servers are. In that way, I feel etcd et al. are > adhering to the unix philosophy of "do one thing, and do it well." -- Konstantin Osipov, Moscow, Russia
