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@xxxxxxxxxxxxx" <oracle-l-bounce@xxxxxxxxxxxxx> on behalf
of Andrew Kerber <andrew.kerber@xxxxxxxxx>
Reply-To: "andrew.kerber@xxxxxxxxx" <andrew.kerber@xxxxxxxxx>
Date: Monday, November 16, 2020 at 6:11 PM
To: "smishra_97@xxxxxxxxx" <smishra_97@xxxxxxxxx>
Cc: Oracle-L Freelists <oracle-l@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx> 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
1. 12.2 is CDB with one PDB that has to be upgraded
2. ASM storage has additional 200 Tb available to be used for this upgrade
purpose ,if required for any option
3. It is Exadata with two node
4. Environment also has Dataguard on another Data Center with same hardware
like primary
5. Golden Gate license is available for any option that can save downtime
Thanks for your time and suggestion
Sanjay
