Data Guard :: Redo Archive Logs Missing
Apr 23, 2013
While Configuring Data Guard for ORacle 10g (10.2.0.4) 64 bits on Windows 2007 Server 64 bits.I got few questions
1. What is the Default mode of Standby Database?
2. Should we Always Start Physical Standby Database to Recover Missing Redo Archive Log?
SQL> startup mount;
ORACLE instance started.
Total System Global Area 591396864 bytes
Fixed Size 2067496 bytes
Variable Size 163578840 bytes
Database Buffers 419430400 bytes
Redo Buffers 6320128 bytes
Database mounted.
SQL> alter database recover managed standby database disconnect from session;
Database altered.
3. When there are missing Redo Log Archives e.g.
----On Standby Database--------
SQL> SELECT RESETLOGS_ID,SEQUENCE#,STATUS,ARCHIVED FROM V$ARCHIVED_LOG
2 ORDER BY RESETLOGS_ID,SEQUENCE#;
RESETLOGS_ID SEQUENCE# S ARC
------------ ---------- - ---
812980008 15 A YES
812980008 16 A YES
812980008 17 A YES
812980008 18 A YES
[code]....
65 rows selected. Log 8, 9, 10, 11, 12, 13, 14, 15 are missing.
How to Apply / Recover These Logs on Standby Database?
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Feb 16, 2012
If my standby database is read only mode,does it can app the archive logs which come from primary database?
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Jun 27, 2013
Currently I am at the point where the configuration has been completed, and I just need to sync the standby database to the primary one. I can see in the log files that the archive logs are being shipped, but they are not applied on the standby system.
If I run "recover standby database;" manually in sqlplus I can see that it is trying to apply an archive log which is way too old (ORA-00279: change 9656498443 generated at 04/29/2008 08:45:08 needed for thread 1). I
n the alert log I can also see this error: Warning: Recovery target destination is in a sibling branch of the controlfile checkpoint. Recovery will only recover changes to datafiles.
At this point I was thinking that the standby database might be on a different incarnation compared to the primary, but this is not the case, they are both in incarnation 6:6 6 MVF 4023175798 CURRENT 48493546257 13-06-21
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Dec 9, 2012
We are using the following commands to take hot backup of our RAC database. Hot backup is fired by "backup" user on Linux system.
=======================
rman target / nocatalog <<EOF
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '$backup_dir/$date/%F';
run {
allocate channel oem_backup_disk1 type disk format '$backup_dir/$date/%U';
#--Switch archive logs for all threads
[code]......
=======================
Due to which after command (used 2 times) "sql 'alter system archive log current';" I see the following lines in alert log 2 times. Because of this all the online logs are not getting archived (Missing 2 logs per day), the backup taken is unusable when restoring. I am worried about this. I there any to avoid this situation.
=======================
Errors in file /u01/oracle/admin/rac/udump/rac1_ora_3546.trc:
ORA-19504: failed to create file "+DATA/rac/1_32309_632680691.dbf"
ORA-17502: ksfdcre:4 Failed to create file +DATA/rac/1_32309_632680691.dbf
ORA-15055: unable to connect to ASM instance
ORA-01031: insufficient privileges
=======================
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Oct 7, 2012
We have a nightly rman backup that was complete and clean.The backup contains a Data File, Control File and a backup Archive Log file.The database server crashed with all the subsequent archive logs lost.
We are trying to recover from the three backup files.We are bumping into the backup piece missing as all the archive logs are done. how to restore with the exising backup files. the lost archive logs are probably salvageable.
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May 24, 2011
Before I begin, I want to clarify that I am newbie in the administration of data warehouse.I need to know how to calculate the sizes of the archive and redo on data warehouse DB, in order to make an initial sizing of the BD on disks level.
Is there a formula to calculate the size?
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Oct 25, 2011
I'm using oracle 10.2.0.3. on windows 2003. I've implemented physical stanby and it was working fine until last week. No problem on primary DB. Archived logs are sent normally to standby. And standby DB is also able to apply the archived logs coming from primary. I've already check data on standby DB after opening it with READ ONLY option : data are exported normally and I can read them.
The issue is the status of logs in view v$log on standby database.
select group#,status from v$log;
group# status
1 clearing_current
2 clearing
3 clearing
I've tried this :
On standby DB :
SQL> RECOVER MANAGED STANDBY DATABASE CANCEL;
Media recovery complete.
SQL> alter database open read only;
complete.
SQL> alter database clear logfile group 1;
Database altered.
SQL> alter database clear logfile group 2;
Database altered.
SQL> alter database clear logfile group 3;
Database altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS
---------- ---------- ---------- ---------- ---------- --- ----------------
FIRST_CHANGE# FIRST_TIM
------------- ---------
1 1 0 5242880 1 YES CURRENT
1096021 25-OCT-11
2 1 0 5242880 1 YES UNUSED
1087538 25-OCT-11
3 1 0 5242880 1 YES UNUSED
1091468 25-OCT-11
I go back into recovery mode and my status says clearing_current.
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
Database altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS
---------- ---------- ---------- ---------- ---------- --- ----------------
FIRST_CHANGE# FIRST_TIM
------------- ---------
1 1 517 5242880 1 YES CLEARING_CURRENT
1096021 25-OCT-11
3 1 0 5242880 1 YES UNUSED
1091468 25-OCT-11
2 1 0 5242880 1 YES UNUSED
1087538 25-OCT-11
I know that the good status is ACTIVE or CURRENT or INACTIVE...
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Aug 5, 2011
Is there any way to find out the last archived file's:
A) sequence no
B) Date and time
C) As well as the log group name.
I have 4 Log group.
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Jan 27, 2011
I've a primary database and a physical standby.Logs are shipping perfectly from primary to standby.The logs that are applied on the standby are getting stored in a mount point(LINUX-/opt2) which consumes more space(160 GB). Will that be right if I go ahead and delete them?
My rman configurations in primary is:
RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 4;
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
[Code]....
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Jan 11, 2012
I got a database on dataguard and my primary (db1) is shipping files to my standby (db2) with no problems.However, when I query:
select sequence#, status, applied from v$archived_log;
I see this:
SEQUENCE# S APP
---------- - ---
4 A YES
5 A YES
6 A YES
7 A YES
8 A YES
9 A YES
10 A YES
11 A YES
12 A YES
13 A YES
14 A YES
[code]....
So I did an alter system switch logfile on db1 then looked again and I can see new archived logs being applied.I thought all archived logs had to be applied on the standby since this is the very foundation of the standby database.Am I going to run in trouble later if I have a failover (unsynchronized database)
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Sep 5, 2012
I have created a physical standby database and in it the logs are not getting applied.following is an extract of the standby alert log
Wed Sep 05 07:53:59 2012
Media Recovery Log /u01/oracle/oradata/ABC/archives/1_37638_765704228.arc
Error opening /u01/oracle/oradata/ABC/archives/1_37638_765704228.arc
Attempting refetch
Media Recovery Waiting for thread 1 sequence 37638
Fetching gap sequence in thread 1, gap sequence 37638-37643
Wed Sep 05 07:53:59 2012
RFS[46]: Assigned to RFS process 3081
RFS[46]: Allowing overwrite of partial archivelog for thread 1 sequence 37638
RFS[46]: Opened log for thread 1 sequence *37638* dbid 1723205832 branch 765704228
Wed Sep 05 07:55:34 2012
RFS[42]: Possible network disconnect with primary database
However, the archived files are getting copied to the standby server.I tried registering and recovering the logs but it also failed..Follows some of the information,
Primary
Oralce 11R2 EE
SQL> select max(sequence#) from v$log where archived='YES';
MAX(SEQUENCE#)
--------------
37668
[code]...
troubleshoot this and get the standby in sync.
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Jun 5, 2013
DB Version- 11.2.0.3
For the maximum protection and maximum availability as well as to enable Real Time Apply we need to setup the standby redo log group. My question is what would be the standby redo log group configuration in case if we setup single instance standby database for 2-Node RAC primary database. Do we require a separate standby redo thread for each primary online redo thread or RFS use the Multiple Standby redo group from the same thread to receive the redo changes from both the node ?
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Jul 23, 2013
We are going to set up dataguard physical standby on 2-node RAC, which primary is also 2-node RAC.
PRD site: prd-node1 & prd-node2DR site: dr-node1 & dr-node2.
As I know, there is only 1 instance to do the redo apply on standby (i.e. dr-node1).
My question is, what will happen if dr-node1 failure (by shutdown abort or kill process)? will dr-node2 change to redo apply?
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Jul 22, 2013
I have a Sap Primry Database and also a standby db that was working perfectly.. We migrated the primary db from windows 2003 to windows 2008 and brought the primary db up.. I had to create a controlfile and do a system copy and had to reset the logs on the Primary.. All came up and when i checked the standby it was receiving the logs but after a month. i see that it was not applying the logs as I think because of the sequence number .. it stopped.
I did the ffg as per the attachement...My logs have been shipped across but not applied, But What worrries me is the log sequence number on my Primary
SQL> select max(sequence#),thread# from gv$archived_log group by thread#;
MAX(SEQUENCE#) THREAD#
-------------- ----------
27727 1
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May 29, 2010
How to transfer redo log files to standby database..
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Mar 3, 2012
I want to replace one redo log on the primary database. actually this redo log is on G:oracleoradata; I want to move it on F:oracleoradata. How to do that cause the same redo log is also on standby database?
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Sep 13, 2011
I've only successfully duplicate a standby database.
from the alert log
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: 'D:ORA102CTAREDO01.LOG'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
[code].....
when I tried to add the online and standby redo log, it error out
SYS@CTA>select logdetail.member, loggroup.group#, loggroup.sequence#, loggroup.archived, loggroup.status lg_status, logdetail.status ld_detail, logdetail.type
2 from v$log loggroup join v$logfile logdetail
3 on loggroup.group# = logdetail.group#;
MEMBER
--------------------------------------------------------------------------------
GROUP# SEQUENCE# ARC LG_STATUS LD_DETA TYPE
---------- ---------- --- ---------------- ------- -------
[code].....
based on my understanding from [URL] ....
Quote:
As part of the duplicating operation, RMAN automates the following steps:
Creates a control file for the duplicate database
Restores the target datafiles to the duplicate database and performs incomplete recovery by using all available incremental backups and archived redo logs
Shuts down and starts the auxiliary instance (refer to "Task 4: Start the Auxiliary Instance" for issues relating to client-side versus server-side initialization parameter files)
Opens the duplicate database with the RESETLOGS option after incomplete recovery to create the online redo logs (except when running DUPLICATE ... FOR STANDBY, in which case RMAN does not open the database) when duplicating for standby database it does not create online redo logs. Duplicating a standby database does not creates online redo logs.
how should I add the online and standby redo logs. If I transfer the redo logs from primary to standby, it always encountered the the following error
Dump file d:ora102ctadumpcta_arc0_3624.trc
Tue Sep 13 19:21:53 2011
ORACLE V10.2.0.4.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the OLAP, Data Mining and Real Application Testing options
Windows XP Version V5.1 Service Pack 2
[code].....
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Mar 6, 2012
I am working on Data Guard concepts. I have configured Data Guard which is working fine.
Now I am trying to work on script which can give me output on OS prompt if there are any archive gaps..
I tried to use few commands on a script archgap.sh as
archgap.sh
sqlplus "/ as sysdba"
select * from v$archive_gap;
I am trying to run above script on OS prompt as
ABC:/home/oracle>sh archgap.sh
but I am not getting output ... I want it a way that this script should run within interval of 5 min and give output on OS prompt.
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Mar 8, 2013
I have a RAC system with DR set-up, this is a test environment and it doesn't have any backup, why DR is required but it exist. Since this is a test a lot or archives gets generated and deleting the archives has become a daily job for this server manually.
I want have a script to delete archive logs which is in non-ASM (i.e. filesystem) after ensuring that the archive log has been applied in standby database. If this can done only by RMAN.
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Apr 9, 2013
1) If i do changes in table on primary database and if i open standby database in Read-Only mode, i can see those changes immediately only if Real Time Apply is enabled. Am i correct? Database version is 10.2.0.4
2) From 11g, It is possible to apply redo while the standby is open in read only mode. prior to 11g, it was not possible. Right?
3) Should I first cancel Managed Recovery prior to issuing “ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY”?
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Nov 17, 2012
I have a two node rac DB (prim and stdby) with two threads. I am trying to put together a script that will detect any gaps in the log files.
I know that MRPO only runs on one node. When I run the following query (see below) I can only see the sequence# for one of the threads.
select thread#, sequence#, process from gv$managed_standby;
THREAD# SEQUENCE# PROCESS
---------- ---------- ---------
1 119739 MRP0
...
...
I than query my PRIM DB and subract the value from my STBY DB to see the difference (gap)
select (sequence# - &scn) from v$log where thread# = &thrd and status ='CURRENT'
Can there be gaps in more than one thread? If so, how can I see the diffences?
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Jun 18, 2011
We are planning to setup a data guard (Maximum performance configuration ) between two Oracle 9i databases on two different servers.
The archive logs on the primary servers are deleted via a RMAN job bases on a policy , just wondering how I should delete the archive logs that are shipped to the standby.
Is putting a cron job on the standby to delete archive logs that are say 2 days old the proper approach or is there a built in data guard option that would some how allow archive logs that are no longer needed or are two days old deleted automatically.
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Jul 2, 2011
We have Oracle 10G dataguard configured,
DGMGRL -
Show configuration;
Shows status "SUCCESS"
Also
Archive log list
shows the proper archives in PROD as well as DR
But, when we check the Archive Applied ="YES" its shows result as "BLANK"
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Mar 25, 2013
We recently configured data guard in test machine.Archives not applied in physical standby.Where i need to start investigation?
Primary
SQL> select THREAD#,max(sequence#) from v$archived_log where applied='YES' group by thread#;
THREAD# MAX(SEQUENCE#)
---------- --------------
1 301
[code]...
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Feb 15, 2012
The archive log can not send to the standby database, how to do?
primary database spfile:
*.db_name=oracl
*.db_unique_name=oracl
[Code]....
Error 12170 received logging on to the standby
Error 12170 connecting to destination LOG_ARCHIVE_DEST_2 standby host 'oraclbak'
Error 12170 attaching to destination LOG_ARCHIVE_DEST_2 standby host 'oraclbak'
ORA-12170: TNS:Connect timeout occurred
*** 2012-02-15 08:31:50.678 60679 kcrr.c
PING[ARCq]: Heartbeat failed to connect to standby 'oraclbak'. Error is 12170.
*** 2012-02-15 08:31:50.680 58941 kcrr.c
kcrrfail: dest:2 err:12170 force:0 blast:1
kcrrwkx: nothing to do (end)
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Aug 5, 2011
I need a clarification on the below query.
I am having a Dataguard setup as Logical.
I am copying all the archive log files generated in the live server into the local server in order to apply into the Data Guard.
I am running a script for this process.
Question:How i can verify whether particular archive log file was applied into the data guard or not.
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Mar 28, 2011
We have a request to configure data guard for databases on the production server. Here is my situation:
We have a backup strategy in place where the backups are being taken on a regular basis. Archive logs are deleted as soon as they are backed up.
My question now is , is there a way of configuring the Data guard in such a way that there would be no change to existing backup strategy (RMAN) and still duplicate the archive logs to another destination and not delete the archive logs by RMAN backup process on that destination while the first destination is deleted.
We will be deleting the logs in the second archive destination using a script which checks if the logs were applied.
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Dec 9, 2010
I successfully created the standby database and the archive logs were properly moving on both the primary and the standby databases. For the proper transfer of the archive logs on the STANDBY database I used "FAL_CLIENT AND FAL_SERVER" in the pfile of the primary database specifying the location of the primary and the Standby respectively.
When I removed both the parameters from the pfile of the primary database still there was the transfer of the archive logs however there should not be "If I am not wrong" as I have removed both the parameters.
why there is still the transfer of the archive logs on the standby database.
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Aug 8, 2012
I'm using Oracle 10gR2 (10.2.0.4.0) 64 bits.
I got many times oracle ORA-00494 error and the database went down but since 29th of july the database have not been killed.
The error message is below :
ORA-00494: mise en file d'attente [CF] d�tenue pendant trop longtemps ( (more than 900 seconds)) par inst 1, osid 176484
ORA-00028: votre session a �t� ferm�e
My database is used for datawarehouse of many terabytes.
Initially the redo log size was 500Mbytes and I've set it to 3Gbytes. The maximum log switch is after 5 minutes. I want log to be switched every 20 minutes or every 30 minutes.
To obtain the size of redo logs I've executed this query :
SQL> select OPTIMAL_LOGFILE_SIZE from v$instance_recovery;
OPTIMAL_LOGFILE_SIZE
--------------------
54763
53,5 Gbytes is it not very big as redo log size? What's the maximum size of redo log? To set very big redo log size what are the requirements? Which precautions should I take before? What are the risks? Are any other ways to change the log switch frequency?
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May 28, 2013
is it Any way I can put the size of my redo log (During Install Oracle DB 11.1.0.7 )
I mean during installtion .??? becouse its by default 50 MB I need to be 200MB
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