By the way, I forgot to ask.. are you looking for high availability(no downtime) from both primary and standby when ADG enabled? - Nassyam Basha. On Mon, Dec 23, 2013 at 8:43 PM, Nassyam Basha <nassyambasha@xxxxxxxxx>wrote: > Hi Chris, > > Usually when patching on DataGuard environment, Standby will be down and > patch will be applied(No post scripts will be updated), Next we jump to > primary database and here its RAC so we can opt for rolling patching. in > rolling patch there is no downtime at all. And each node will be patched > and brought up while other node(s) are still running after all patching is > done we do run post scripts..hence patching will be completed on primary.. > So we can avoid downtime on Primary. > > So far we initially already patched on standby and also primary, When > patches are applied on whole environmnet, when we start MRP of course > dictionary will be updated whenever the archives/redo applied on standby > database(s). So still we can avoid downtime. > > If you are planning for master patching, from 11g release to release (or) > patch set upgrade, Then you might consider rolling upgrade patching. You > can refer > http://www.oracle.com/technetwork/database/features/availability/maa-wp-11g-upgrades-made-easy-131972.pdf > > In short i can say not complex, If properly planned :) > Correct me if missing or something wrong. > > Thanks, > Nassyam Basha. > www.oracle-ckpt.com > > > On Mon, Dec 23, 2013 at 8:07 PM, Chris King <ckaj111@xxxxxxxx> wrote: > >> We're architecting a new system, and will need 99.5% availability. >> Looking over Oracle's MAA options, I see RAC with Data Guard. .. but it's >> not clear to me how this would actually work to avoid ALL downtime. Won't I >> still need downtime to apply patches, even if I use rolling patches? And >> isn't it more complex applying patches when there's a standby involved? >> >> Is 99.5% really achievable with this combination? >> >> Thanks in advance.. >> > > > > -- > Thanks & Regards, > Nassyam Basha. > www.oracle-ckpt.com > -- Thanks & Regards, Nassyam Basha. www.oracle-ckpt.com