openstack team mailing list archive

[Soren Hansen <soren@xxxxxxxxxxx>]

2011/11/10 Ryan Lane <rlane@xxxxxxxxxxxxx>:
>> That's the whole point. For most interesting applications, "fast"
>> automatic migration isn't anywhere near fast enough. Don't try to
>> avoid failure. Expect it and design around it.
> This assumes all application designers are doing this. Most web
> applications do this fairly well, but most enterprise applications do
> this very poorly.

I know. That's what makes them a poor fit for "the cloud".

> 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. :)

-- 
Soren Hansen        | http://linux2go.dk/
Ubuntu Developer    | http://www.ubuntu.com/
OpenStack Developer | http://www.openstack.org/