Also hang on a minute about whether the standby of UAT is needed.
Can the UAT be reinstantiated from PROD? Yes. So recovery to the point of a
fresh refresh from PROD does not require a backup.
However before you run off shouting a standby is not needed you need to know
how UAT is used.
For example, it could be refreshed once a week or month and used to test
development that has been passed out from engineering. The first step after
the refresh might be complicated changes to the structure of the data that may
require hours or days. Let’s say that is cleverly scheduled for the weekend,
and then the UAT test team commences work on the clean update massaged from
PROD to use the improved application suite.
Bam! the primary UAT server bites it. Do the thousands of dollars per hour
expert user new functionality testers (often including consultants) twiddle
their thumbs for a couple days while UAT is restored from PROD and then
re-updated to be ready to test the software revision? NO, because you bring up
the standby and fork them over there until you can fail back.
Now, given the exact purpose and use of the UAT database at a particular
department of a particular company, perhaps we can streamline something.
The large majority of UAT databases I have seen are used for three things:
1) the scenario above, testing new application functionality
2) vendor updates (Oracle RDBMS, operating system, or both) where you
refresh from PROD, run the updates (or patches), and then run your regression
test. The updates and patches can be too long to repeat cost effectively.
3) experimenting on the PROD data’s copy on UAT to investigate User reported
bugs.
Having this functionality unavailable during whatever prime time is while a new
refresh is done is often not acceptable. In 24 by 7 nearly flat loads, it may
require 2 UAT databases, each with a standby, so that while one is being
refreshed the other is still available for anything that does not require newer
data.
Question it? Sure. But there is a very good chance it IS needed.
mwf
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Howard Latham
Sent: Wednesday, November 13, 2019 8:23 AM
To: nenad.noveljic@xxxxxxxxxxxx
Cc: rjgoulet@xxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: Re: is there any way i can avoid rebuild physical standby database
after every PROD to UAT database refresh ?
Hang on just a thought? how do you refresh the uat DB? did I miss that?
Best Wishes
Howard A. Latham
On Wed, 13 Nov 2019 at 06:53, Noveljic Nenad <nenad.noveljic@xxxxxxxxxxxx>
wrote:
You nailed it - this standby database is completely useless from the data
protection perspective. The only valid reason I can imagine for having it is to
test its impact on performance.
It's existence should be challenged before doing anything else.
Best regards,
Nenad
https://nenadnoveljic.com/blog/
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> On Behalf
Of richard goulet
Sent: Mittwoch, 13. November 2019 05:05
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: is there any way i can avoid rebuild physical standby database
after every PROD to UAT database refresh ?
I would question why there is a data guard standby on UAT when your refreshing
the primary db from production. The very fact that you refresh from prod
says that your standby is worthless. Not only is this causing more work than
necessary it is also a waste of time and money to maintain the standby. In
this case I would recommend deleting the standby period. It just isn't worth
the effort.
--
//www.freelists.org/webpage/oracle-l
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