Re: Database Upgrade

It depends on his conditions, which we don’t know. If 1 hour is brief, DBUA is viable and requires minimal additional planning and rehearsal. GG and other such cloning methods will require a certain amount of network redirection and rehearsal, as well as additional storage. Basically you trade off downtime for front end prep. Based on his questions, I wouldn’t exclude anything yet.

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> On Nov 16, 2020, at 16:21, Bobby Curtis <curtisbl_at_gmail.com> wrote:
>
> 
> Andrew,
>
> All valid points, but why even take an outage? Data copy (export/import) or even RMAN clone can be done while operations are still occurring for the business. Build the upgraded database in parallel with GG, then switch over when ready. 10 min outage, if that.
>
> Bobby
>
> From: "oracle-l-bounce_at_freelists.org" <oracle-l-bounce_at_freelists.org> on behalf of Andrew Kerber <andrew.kerber_at_gmail.com>
> Reply-To: "andrew.kerber_at_gmail.com" <andrew.kerber_at_gmail.com>
> Date: Monday, November 16, 2020 at 6:11 PM
> To: "smishra_97_at_yahoo.com" <smishra_97_at_yahoo.com>
> Cc: Oracle-L Freelists <oracle-l_at_freelists.org>
> Subject: Re: Database Upgrade
>
> Well, the upgrade time really isn’t dependent on the size of the database. I do recall there can be issues upgrading the time zone via dbua, so you don’t want to check that option. I expect you can do the upgrade with just an hour or so of downtime. Make sure you go through the documentation on upgrading the standby first. If zero downtime is required, that gets a lot harder considering the amount of data that needs to be copied.
>
> Sent from my iPad
>
>
> On Nov 16, 2020, at 16:05, Sanjay Mishra <dmarc-noreply_at_freelists.org> wrote:
>
> 
> Hi Everyone
>
> I had 160 Tb Database in 12.2 and had to upgrade to 19c. Can you please suggest the best option that can help to update with small downtime and also option to rollback for any failure without going for big Restore that can take day for the restore. Some details for the database and option that can be used are
> 12.2 is CDB with one PDB that has to be upgraded
> ASM storage has additional 200 Tb available to be used for this upgrade purpose ,if required for any option
> It is Exadata with two node
> Environment also has Dataguard on another Data Center with same hardware like primary
> Golden Gate license is available for any option that can save downtime
> Thanks for your time and suggestion
>
> Sanjay

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