Re: Data Guard Issue

From: Jon Crisler <joncrisler_at_gmail.com>
Date: Wed, 28 Aug 2024 10:41:56 -0400
Message-Id: <3D767E05-FB7A-4D87-9AE8-FB8C55E40DA5_at_gmail.com>

In this case you need to cancel mrp before you try to restart it .   Double check the incarnations once you get media recovery running (rman or dg mrp) .  Worst case you will need a full rman copy to restore the standby , and use a control file from “after” the rman backup , otherwise you have to manually catalog your rman backups.  



We are running Oracle 19.23.  We have a data guard configuration that isn’t working.  About 2 months ago, someone changed the secondary to a snapshot standby instead of a physical standby.  That was just discovered and it’s too late to recover all the now missing archive logs (backups are only kept for 30 days).  I tried to restore the database from the primary via an RMAN backup/recovery.  That appears to have worked.  Now the archive logs are being brought over, but not applied.  The secondary says it’s a physical standby, but cloud control says it’s still a snapshot standby.  When I tried to recover it, I get an ORA-01153.  I also noticed that the MRP0 is waiting for log 1, which doesn’t exist.  I’ve been searching online and nothing is working.  Of course this is a critical production database.

 

How do I get this data guard mess straightened out?

 

SQL> select status,instance_name,database_role,open_mode from v$database,v$Instance;

 

STATUS       INSTANCE_NAME    DATABASE_ROLE    OPEN_MODE

------------ ---------------- ---------------- --------------------

MOUNTED      CLAWPRDA         PHYSICAL STANDBY MOUNTED

 

SQL> SELECT PROCESS, STATUS, THREAD#, SEQUENCE#, BLOCK#, BLOCKS FROM V$MANAGED_STANDBY;

 

PROCESS   STATUS          THREAD#  SEQUENCE#     BLOCK#     BLOCKS

--------- ------------ ---------- ---------- ---------- ----------

ARCH      CLOSING               1     140772     411648        298

DGRD      ALLOCATED             0          0          0          0

DGRD      ALLOCATED             0          0          0          0

ARCH      CLOSING               1     140773     411648       1219

ARCH      CONNECTED             0          0          0          0

ARCH      CONNECTED             0          0          0          0

RFS       IDLE                  1          0          0          0

RFS       RECEIVING             1     140774     258804          2

MRP0      WAIT_FOR_LOG          1          1          0          0

 

9 rows selected.

 

SQL> select sequence#, archived, applied from v$archived_log order by sequence#;

 

SEQUENCE# ARC APPLIED

---------- --- ---------

    140768 YES NO

    140769 YES NO

    140770 YES NO

    140771 YES NO

    140772 YES NO

    140773 YES NO

 

6 rows selected.

 

SQL> recover standby database;

ORA-01153: an incompatible media recovery is active

 

 

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 | 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.

 

--
http://www.freelists.org/webpage/oracle-l

Received on Wed Aug 28 2024 - 16:41:56 CEST