On 17/04/13 12:33 PM, "Prasanna Santhanam" <t...@apache.org> wrote:
>On Tue, Apr 16, 2013 at 07:33:28PM +0530, Abhinandan Prateek wrote: >> >> I have some queries regarding Database Creator: >> >> Can this feature be tested on 4.1 ? >> >> Could someone also provide more details on the following: >> >> 1. Outline the exact steps that are involved in rolling upgrade >>procedure? >> 2. Can you confirm if rolling upgrades are specific to only upgrade >> procedure involving multiple management servers in a cluster? >> 3. Would rolling upgrades mean that there will be zero downtime for >> customers when upgrading? Are we also dealing with NOT having to >>restart all >> system Vms ? Currently restarting system Vms is part of our upgrade >> procedure. >> >Rohit has written most of the design goals and implementation in the >wiki: >https://cwiki.apache.org/confluence/display/CLOUDSTACK/Database+Creator > >The term 'rolling upgrade' might be loaded here. I don't see anything >in the spec/code that guarantees that no downtime is reqd. It only >alters the way upgrades are done - sticking to a base schema at 4.0 >and doing incremental upgrades from there. Also what exactly does no downtime means ? Is it just that the one of the MS in the cluster will be running providing minimal services during upgrade Or that there will be no disruption of services. We also need to figure out who db locking by running MS may have its affect on running db upgrades. > >-- >Prasanna.,
