RE: Data Guard Question

From: Scott Canaan <srcdco_at_rit.edu>
Date: Fri, 2 Jul 2021 16:11:32 +0000
Message-ID: <8ba742326bee4c219c37699e98157f85_at_ex04test91a.ad.rit.edu>

I got the files back and the secondary is now applying them. Lunch time.

Thank you all!

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From: Andrew Kerber <andrew.kerber_at_gmail.com> Sent: Friday, July 2, 2021 12:05 PM
To: Scott Canaan <srcdco_at_rit.edu>
Cc: nassyambasha_at_gmail.com; Sweetser, Joe <JSweetser_at_icat.com>; oracle-l_at_freelists.org Subject: Re: Data Guard Question

If oracle is aware of the backup, you should be able to do this:

rman target /
rman> restore archivelog from sequence xxxxxx until sequence xxxxxx thread x;

If oracle doesnt know about the backup, you will need to use the catalog command to catalog it. You can do that on the primary and they should get automatically shipped to the standby.

On Fri, Jul 2, 2021 at 10:51 AM Scott Canaan <srcdco_at_rit.edu<mailto:srcdco_at_rit.edu>> wrote: We do have an RMAN backup of the database, but I don’t know how to get just the log files out of the backup.

Scott Canaan ‘88
Sr Database Administrator
Information & Technology Services
Finance & Administration
Rochester Institute of Technology
o: (585) 475-7886 | f: (585) 475-7520
srcdco_at_rit.edu<mailto:srcdco_at_rit.edu> | c: (585) 339-8659 CONFIDENTIALITY NOTE: The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this information.

From: oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org> <oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org>> On Behalf Of Scott Canaan Sent: Friday, July 2, 2021 11:47 AM
To: nassyambasha_at_gmail.com<mailto:nassyambasha_at_gmail.com> Cc: Sweetser, Joe <JSweetser_at_icat.com<mailto:JSweetser_at_icat.com>>; oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: RE: Data Guard Question

Database version is 19.11.

From: oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org> <oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org>> On Behalf Of Nassyam Basha Sent: Friday, July 2, 2021 11:46 AM
To: Scott Canaan <srcdco_at_rit.edu<mailto:srcdco_at_rit.edu>> Cc: Sweetser, Joe <JSweetser_at_icat.com<mailto:JSweetser_at_icat.com>>; oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: Re: Data Guard Question

If the archives unavailable either physically or in backups then only method is Incremental roll forward.

If your db version is 12c, try recovering using service method.

https://blog.toadworld.com/how-data-guard-benefited-with-rman-12c-new-features

Nassyam on iPhone

On 2 Jul 2021, at 6:42 PM, Scott Canaan <srcdco_at_rit.edu<mailto:srcdco_at_rit.edu>> wrote:
I did find a gap. There are missing logs. I’m trying to get them from backup, but it doesn’t appear they are there.

From: Sweetser, Joe <JSweetser_at_icat.com<mailto:JSweetser_at_icat.com>> Sent: Friday, July 2, 2021 11:37 AM
To: nassyambasha_at_gmail.com<mailto:nassyambasha_at_gmail.com>; Scott Canaan <srcdco_at_rit.edu<mailto:srcdco_at_rit.edu>> Cc: oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: RE: Data Guard Question

I have sometimes had to register ‘missing’ log files like:

alter database register logfile '/full/path/to/arch/logs/arch_1234.arc';

If there are many files, you can use the RMAN catalog command:

                catalog start with ‘/full/path/to/arch/logs/’;

Hth,
-joe

From: oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org> <oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org>> On Behalf Of Nassyam Basha Sent: Friday, July 2, 2021 9:29 AM
To: srcdco_at_rit.edu<mailto:srcdco_at_rit.edu> Cc: oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: Re: Data Guard Question

Hello Scott,

Are you sure that all required archives are available at standby database?

> PR00 (PID:29394): GAP - thread 1 sequence 44056-44081

Can you verify the sequences are available or not by this query?

Standby> Select sequence#, name from v$archived_log where sequence# > 44055 and sequence# < 44082;

In short, as per the alert log info it seems few set of archive logs are not shipped from primary to standby. The reason could be either data guard configuration issue or archives might got deleted at primary.

Nassyam on iPhone

On 2 Jul 2021, at 6:21 PM, Scott Canaan <srcdco_at_rit.edu<mailto:srcdco_at_rit.edu>> wrote:
I have a data guard set up where the logs are being shipped to the secondary, but not being applied. I’ve verified that all the needed logs are there, but it won’t apply them. I don’t know how to get it to start.

I tried ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;, but that did nothing. All I got was an error in the alert log. I tried bouncing the database and got the following:

Completed: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT NODELAY 2021-07-02T11:13:24.778232-04:00
ALTER SYSTEM SET fal_server='clawbeta' SCOPE=BOTH;

2021-07-02T11:13:48.721856-04:00
PR00 (PID:29394): FAL: Failed to request gap sequence
PR00 (PID:29394):  GAP - thread 1 sequence 44056-44081
PR00 (PID:29394):  DBID 2700461164 branch 1043824278
PR00 (PID:29394): FAL: All defined FAL servers have been attempted
PR00 (PID:29394): -------------------------------------------------------------------------
PR00 (PID:29394): Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization
PR00 (PID:29394): parameter is defined to a value that's sufficiently large
PR00 (PID:29394): enough to maintain adequate log switch information to resolve
PR00 (PID:29394): archived redo log gaps.
PR00 (PID:29394): -------------------------------------------------------------------------

Control_file_record_keep_time is 30, which I understand is in days. The oldest log to be applied is from June 25, so that’s within the 30 days.

How do I get the secondary to apply the needed logs?

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Received on Fri Jul 02 2021 - 18:11:32 CEST

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