RE: Oracle upgrade without downtime??
- From: Upendra N <nupendra@xxxxxxxxxxx>
- To: <a.piesk@xxxxxxx>
- Date: Wed, 1 Sep 2010 00:27:39 -0400
Thanks for your suggestions.
15-20 mins downtime is acceptable.
I couldn't find any whitepapers on transportable tablespace for upgrade.
There was one in OTN, however the link is broken or the document is taken off
the site...
-Upendra
> Date: Tue, 31 Aug 2010 22:21:14 +0200
> From: a.piesk@xxxxxxx
> To: nupendra@xxxxxxxxxxx
> CC: oracle-l@xxxxxxxxxxxxx
> Subject: Re: Oracle upgrade without downtime??
>
> Upendra N schrieb:
> > For the database upgrades Oracle seems to be recommending Logical
> > standby database (SQL Apply).
> > There are a lot of restrictions with Logical standby. Will it work with
> > Physical standby?
>
> no, it won't work with physical standby.
>
> how much downtime you're willing to accept, 5min, 10min, 20min?
>
> did you test how long a upgrade of your database actually take?
>
> if the time taken by the upgrade really exceeds your limit, you should take a
> look at transportable
> tablespaces. using this you can upgrade large databases within 1-5 minutes,
> depending on the number
> of tablespaces you have.
>
> another way, for small amounts (some tens of GB) of data, is replication
> using materialized views.
> very easy to setup and works very well. depending on the amount of activity
> in the database you can
> switch within 1 minute.
>
> regards,
> -ap
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