> I know. That's what makes them a poor fit for "the cloud". >
Meh. Private clouds will still use applications like this. I think "the cloud" is great for cloud providers, but why limit nova's usefulness to just cloud providers? "The cloud" way of doing things pushes the responsibility of keeping applications alive to the client. There's a lot of clients that don't have this level of sophistication. >> Hardware HA is useful for more than just poorly designed applications >> though. I have a cloud instance that runs my personal website. I don't >> want to pay for two (or more, realistically) instances just to ensure >> that if my host dies that my site will continue to run. My provider >> should automatically detect the hardware failure and re-launch my >> instance on another piece of hardware; it should also notify me that >> it happened, but that's a different story ;). > > I'm not sure I count that as High Availability. It's more like > Eventual Availability. :) > So, this is one HA mode for VMware. There is also a newer HA mode that is much more expensive (from the resources perspective) that keeps a shadow copy of a virtual machine on another piece of hardware, and if the primary instance's hardware dies, it automatically switches over to the shadow copy. Both modes are really useful. There's a huge level of automation needed for doing things "the cloud way" that is completely unnecessary. I don't want to have to monitor my instances to see if one died due to a hardware failure, then start new ones, then pool them, then depool the dead ones. I want my provider to handle hardware deaths for me. If I have 200 web servers instances, and 40 of them die because they are on nodes that die, I want them to restart somewhere else. It removes all the bullshit automation I'd need to do otherwise. - Ryan Lane _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp