Data Guard Info

I have a simple question - using Dataguard 10gR2 is it possible to open the standby database and perform queries requiring sorting? I mean is the temporary tablespace available for writing?

but is that similar to "alter database open read only"? because if that is the case only queries without the need to perform any use of the TEMP tablespace can be executed...

Similar Messages

Shell scripts to monitor data guard

Hi All,
Please help me to have the shell scripts for monitoring the data guard.
Thanks,
Mahi

here is the shell script we use to monitor dataguard, it sends mail if there is a gap for more than 20 archive logs..
#set Oracle environment for Sql*Plus
#ORACLE_BASE=/oracle/app/oracle ; export ORACLE_BASE
ORACLE_HOME=/oracle/app/oracle/product/10.2.0 ; export ORACLE_HOME
ORACLE_SID=usagedb ; export ORACLE_SID
PATH=$PATH:/oracle/app/oracle/product/10.2.0/bin
#set working directory. script is located here..
cd /oracle/scripts
#Problem statemnt is constructed in message variable
MESSAGE=""
#hostname of the primary DB.. used in messages..
HOST_NAME=`/usr/bin/hostname`
#who will receive problem messages.. DBAs e-mail addresses seperated with space
DBA_GROUP='[email protected] '
#SQL statements to extract Data Guard info from DB
LOCAL_ARC_SQL='select archived_seq# from V$ARCHIVE_DEST_STATUS where dest_id=1; \n exit \n'
STBY_ARC_SQL='select archived_seq# from V$ARCHIVE_DEST_STATUS where dest_id=2; \n exit \n'
STBY_APPLY_SQL='select applied_seq# from V$ARCHIVE_DEST_STATUS where dest_id=2; \n exit \n'
#Get Data guard information to Unix shell variables...
LOCAL_ARC=`echo $LOCAL_ARC_SQL | sqlplus -S / as sysdba | tail -2|head -1`
STBY_ARC=`echo $STBY_ARC_SQL | sqlplus -S / as sysdba | tail -2|head -1`
STBY_APPLY=`echo $STBY_APPLY_SQL | sqlplus -S / as sysdba | tail -2|head -1`
#Allow 20 archive logs for transport and Apply latencies...
let "STBY_ARC_MARK=${STBY_ARC}+20"
let "STBY_APPLY_MARK= ${STBY_APPLY}+20"
if [ $LOCAL_ARC -gt $STBY_ARC_MARK ] ; then
MESSAGE=${MESSAGE}"$HOST_NAME Standby -log TRANSPORT- error! \n local_Arc_No=$LOCAL_ARC but stby_Arc_No=$STBY_ARC \n"
fi
if [ $STBY_ARC -gt $STBY_APPLY_MARK ] ; then
MESSAGE=${MESSAGE}"$HOST_NAME Standby -log APPLY- error! \n stby_Arc_No=$STBY_ARC but stby_Apply_no=$STBY_APPLY \n"
fi
if [ -n "$MESSAGE" ] ; then
MESSAGE=${MESSAGE}"\nWarning: dataguard error!!! \n .\n "
echo $MESSAGE | mailx -s "$HOST_NAME DataGuard error" $DBA_GROUP
fi

Data Guard -- v$archive_log applied column shows wrong info

I'm playing with 10g Data Guard. Both Primary and Physical Standby are in Maximum Availability mode. When I query v$archived_log column applied for dest_id=2 (which is physical standby) for some files it shows NO value but alert log on both primary and standby shows file transferred info. Even on physical standby v$archived_log shows log is applied YES value. My question is : So why is Primary database's v$archived_log shows value NO ?
I am trying to setup crontab so that once I see value YES in primary's v$archived_log for dest_id = 2 then I can backup archived log file and delete it from primary database machine. But my perl script won't work because primary v$archived_log shows value NO for applied column for dest_id = 2.
Thanks.

Hi OrionNet,
I think I am looking at the wrong column and also on the wrong database for what I need to do. Let me explain what I am trying to achieve.
I have a shell script to check if archived logs are shipped from Primary to Standby AND if Standby successfully applied it or not. My shell script was looking at Primary databases using following query
select sequence#, archived, applied
from v$archived_log
where dest_id = 2 -- running on Primary BUT looking at standby archived log destination
order by sequence# ;
SEQUENCE# ARCHIEVED APPLIED
=====================
58 YES YES
59 YES YES
*60* YES NO
61 YES YES
After reading [v$archived_log reference entry in manual|http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/dynviews_1016.htm#REFRN30011]
APPLIED Indicates whether the archivelog has been applied to its corresponding standby database (YES) or not (NO). The value is always NO for local destinations.
This column is meaningful at the physical standby site for the ARCHIVED_LOG entries with REGISTRAR='RFS' (which means this log is shipped from the primary to the standby database). If REGISTRAR='RFS' and APPLIED is NO, then the log has arrived at the standby but has not yet been applied. If REGISTRAR='RFS' and APPLIED is YES, the log has arrived and been applied at the standby database.
You can use this field to identify archivelogs that can be backed up and removed from disk.
I think I should use following query on Standby database and not on primary database
select sequence#, registrar, applied
from v$archived_log
where dest_id = 1 -- query running on standby so dest_id = 1 which is standby archive log destination
and registrar = 'RFS'
order by sequence# ;
SEQUENCE# REGISTRAR APPLIED
=====================
58 RFS YES
59 RFS YES
*60* RFS YES
61 RFS YES
So, my shell script should connect to standby database from primary database and evaluate which archive logs to delete after backup from primary machine.
Now I'll generate some gaps on Standby and check query again to make sure what I understand and expect is correct.
Hope I am clear now. Thanks for your help. My bad, I didn't read the manual correctly the first time.

Need some low level help/info on Grid Control / Data Guard

I need to get some info concerning the set up and administration of Grid Control. In particular, I need to know why Grid Control needs to have the Oracle OS-Level username and password stored in Grid Control in order for GC to set up and manage a Data Guard database.
Is it because when the database is being created, GC issues commands like RMAN and SCP to put files onto the standby host?
Also, for accountability purposes, can I not use a named user account (with the same privs as the oracle user) saved as the preferred credential and still perform the necessary functions to use DG and GC together effectively.
Probably a lot of info and variables, and I've not explained much, but happy to explain further if needed.
Thanks!
Edited by: joe.bednarz on Oct 14, 2009 9:38 AM

Thanks for the input... we need to use another account other the "oracle" account so there is some accountability for who does what. If I create an account that has similar privileges as the oracle user, I can still run all things Oracle, while still having a log of my log in time and actions.
More of security issue...
Thanks again. Appreciate it!

Info on licensing issues of standby databases/Oracle Data Guard

Hi All,
Could anyone possibly give me some information on licensing issues of standby databases/Oracle Data Guard? Links to some electronic articles or journals might be useful. I am unable to find the appropriate info and need this quite urgently for my dissertation asap as my deadline is this approaching.
Thanks in advance

Paul Drake posted a reply to a similar question on the Oracle-L mailing list that pointed out that the License Agreement
http://oraclestore.oracle.com/OA_HTML/ibeCCtpSctDspRte.jsp?media=os_local_license_agreement&section=11365&minisite=10021&respid=22372&grp=STORE&language=US
states, in part,
"Failover: Your license for the following programs, Oracle Database (Enterprise Edition, Standard Edition or Standard Edition One) and Oracle Internet Application Server (Enterprise Edition, Standard Edition, Standard Edition One or Java Edition) includes the right to run the licensed program(s) on an unlicensed spare computer in a failover environment for up to a total of ten separate days in any given calendar year. Any use beyond the right granted in the previous sentence must be licensed separately and the same license metric must be used when licensing the program(s)."
which seems to open a bit of wiggle room depending on how the term "run" is defined. This is probably also an area where your Oracle sales rep may have a little more flexibility to negotiate
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Problem with logminer in Data Guard configuration

Hi all,
I experience strange problem with applying of the logs in DataGuard configuration on the logical standby database side.
I've set up the configuration step by step as it is described in documentation (Oracle Data Guard Concepts and Administration, chapter 4).
Everything went fine until I issued
ALTER DATABASE START LOGICAL STANDBY APPLY;
I saw that log applying process was started by checking the output of
SELECT NAME, VALUE FROM V$LOGSTDBY_STATS WHERE NAME = 'coordinator state';
and
SELECT TYPE, HIGH_SCN, STATUS FROM V$LOGSTDBY;
but in few minutes it stoped and quering DBA_LOGSTDBY_EVENTS I saw the following records:
ORA-16111: log mining and apply setting up
ORA-01332: internal Logminer Dictionary error
Alert log says the following:
LOGSTDBY event: ORA-01332: internal Logminer Dictionary error
Wed Jan 21 16:57:57 2004
Errors in file /opt/oracle/admin/whouse/bdump/whouse_lsp0_5817.trc:
ORA-01332: internal Logminer Dictionary error
Here is the end of the whouse_lsp0_5817.trc
error 1332 detected in background process
OPIRIP: Uncaught error 447. Error stack:
ORA-00447: fatal error in background process
ORA-01332: internal Logminer Dictionary error
But the most useful info I found in one more trace file (whouse_p001_5821.trc):
krvxmrs: Leaving by exception: 604
ORA-00604: error occurred at recursive SQL level 1
ORA-01031: insufficient privileges
ORA-06512: at "SYS.LOGMNR_KRVRDREPDICT3", line 68
ORA-06512: at line 1
Seems that somewhere the correct privileges were not given or smth like this. By the way I was doing all the operations under SYS account (as SYSDBA).
Could smb give me a clue where could be my mistake or what was done in the wrong way?
Thank you in advance.

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Error: ORA-16532: Data Guard broker configuration does not exist

Hi there folks. Hope everyone is having a nice weekend.
Anyways, we have a 10.2.0.4 rac primary and a 10.2.0.4 standby physical standby. We recently did a switchover and the dgbroker files automatically got created in the Oracle_home/dbs location of the primary. Now need to move these files to the common ASM DG. For this, I followd the steps from this doc:
How To Move Dataguard Broker Configuration File On ASM Filesystem (Doc ID 839794.1)
The only exception to this case is that I have to do this on a Primary and not a standby so I am disabling and enabling the Primary(and not standby as mentioned in below steps)
To rename the broker configuration files in STANDBY to FRA/MYSTD/broker1.dat and FRA/MYSTD/broker2.dat, Follow the below steps
1. Disable the standby database from within the broker configuration
DGMGRL> disable database MYSTD;
2. Stop the broker on the standby
SQL> alter system set dg_broker_start = FALSE;
3. Set the dg_broker_config_file1 & 2 parameters on the standby to the appropriate location required.
SQL> alter system set dg_broker_config_file1 = '+FRA/MYSTD/broker1.dat';
SQL> alter system set dg_broker_config_file2 = '+FRA/MYSTD/broker2.dat'
4. Restart the broker on the standby
SQL> alter system set dg_broker_start = TRUE
5. From the primary, enable the standby
DGMGRL> enable database MYSTD;
6. Broker configuration files will be created in the new ASM location.
I did so but when I try to enable the Primary back I get this:
Error: ORA-16532: Data Guard broker configuration does not exist
Configuration details cannot be determined by DGMGRL
Form this link,(Errors setting up DataGuard Broker it would seem that I would need to recreate the configuration....Is that correct ? If yes then how come Metalink is missing this info of recreating the configuration... OR is it that that scenario wouldnt be applicable in my case ?
Thanks for your help.

Yes I can confirm from the gv$spparameter view that the changes are effective for all 3 instances. From the alert log the alter system didnt throw u pany errros. I didnt restart the instances though since I dont have the approvals yet. But I dont think thats required.

What is the role of Lns process in oracle 10g data guard

Hi ,
plz help me out to find out the actual working of lns process in oracle 10g data guard
when i use SYNC redo transport
the output of v$managed_stanbdy is like that ..
PROCESS PID STATUS CLIENT_PROCESS GR# SEQ#
ARCH 9258 CLOSING ARCH 2 498
ARCH 9260 CLOSING ARCH 1 499
ARCH 9262 CLOSING ARCH 2 496
ARCH 9264 CLOSING ARCH 1 497
LGWR 9206 CLOSING LGWR 2 482
its not display any info about lns,thats means lns is not working in SYNC redo transport mode ?
but if i changed it to ASYNC then the out put of v$managed_stanbdy is like this ..
PS PID STS CPS GR# SEQ#
ARCH 9258 CLOSING ARCH 1 509
ARCH 9260 CLOSING ARCH 2 510
ARCH 9262 CLOSING ARCH 1 505
ARCH 9264 CLOSING ARCH 2 508
LGWR 9206 CLOSING LGWR 1 503
LNS 10528 CLOSING LNS 2 510
Now it display all the info about lns process...
i read in oracle documentation that lns process send redo data from primary,( through network service ) to RFS on standby side.
but first output means that lns is not working,if not then which process send redo from primary to RFS on standby ?
i also read in some blog that lgwr use some extra buffer size from primary db SGA ,to write redo in that buffer ,ans lns read redo from that buffer and send it to RFS on stanby side,
i m totally confused ..can u plz help me with correct logic behind this .
thanx in advance.

Hello,
On the primary database when you run the v$managed_standby, it shows up the LNS process as this process sends redo info to the standby database and on the standby database the RFS process receives the redo information.
So on the primary database when you query the v$managed_standby, it shows up LNS and on the standby database when you query the v$managed_standby it shows up RFS. Please let us know where you are running the query.
Refer this http://datadisk.co.uk/html_docs/oracle_dg/architecture.htm
969752
Handle:     969752
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Total Posts:     9
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Init SID .ora during configuration of Data Guard - advice required

Hi All,
I am looking to implement data guard across 2 RAC clusters. One cluster will be primary and the other is for Disaster Recovery.
I have already set up the two 11g R 2 RAC clusters on RHEL 5 and now need some pointers to good docs for data guard install.
Can some one direct me to good step by step info for configuring data guard between to RAC clusters - detailed explanations of each step would be useful too, in particular around the init.ora file configuration changes between the primary and DR sites
Much appreciated
Steve

Hi Steve,
look at the MAA Whitepapers:
http://www.oracle.com/technetwork/database/features/availability/oracle-database-maa-best-practices-155386.html
There are very good ressources in setting up RAC DG environments like:
Data Guard 11g Installation and Configuration Best Practices on Oracle RAC
Rapid Oracle RAC Standby Deployment: Oracle Database 11g Release 2
Setup Guide: Creating a RAC Logical Standby Database for a RAC Primary Database
Client Failover in Data Guard Configurations for Highly Available Oracle Databases
a.s.o.
Sebastian

Data guard role transition problem

Hi,
I am trying to do a switchover using the data guard broker cli and get the following error:
DGMGRL> switchover to "TGDRDB01"
Performing switchover NOW. Please wait...
Error: ORA-16775: Target standby in switchover operation has missing redo logs.
Failed.
Can not proceed to switchover. Primary is still "TGDB01".
The drc log file shows a bit more info:
DG 2005-12-01-17:17:43 2000000 3 574466141 DMON: chief lock convert for switchover
DG 2005-12-01-17:17:43 0 2 0 Executing SQL [ALTER SYSTEM ARCHIVE LOG CURRENT]
DG 2005-12-01-17:17:54 0 2 0 SQL [ALTER SYSTEM ARCHIVE LOG CURRENT] Executed successfully
DG 2005-12-01-17:18:17 0 2 0 ORA-16775 Error: the target standby database has 338 redo log(s) missing. Cannot proceed with the switchover operation.
DG 2005-12-01-17:18:17 2000000 3 574466141 Operation CTL_SWITCH cancelled during phase 0, error = ORA-16775
What i don't understand is the bit about 338 redo logs missing becuase the output from "archive log list" on both databases is as follows:
Primary
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /home/oracle/admin/TGPROD/archive
Oldest online log sequence 3091
Next log sequence to archive 3093
Current log sequence 3093
Standby
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /home/oracle/admin/TGPROD/archive
Oldest online log sequence 3091
Next log sequence to archive 0
Current log sequence 3093
Any help will be gratefully recieved as I'm stumped! Found a note for the original oracle error on here that said try switching logfiles a couple of times then trying again - which suffices to say didn't work. I don't understand where it gets 338 missing redo logs from!?!?
Oh and oracle version is 10.1.0.3....
thanks in advance.
regards,
Mark

Yes, it'll be waiting for these archive till he gets them.
If you see the files at system level, then cancel the MRP and apply them manually. If those files are missiong, then stop MRP and propagate hot backups from your primary db to the standby db, then reactivate the MRP. This will resync the databases.
Regards,
Yoann.

Oracle RAC / Logical Data Guard causing network problems on VMware

We have VMWare 5.0 cluster across the 12 blades (6 per chassis) running a mixture of Red Hat and Windows 2008 R2 vms. The Red Hat boxes are two times two node Oracle RAC (primary and secondary), also apache web servers and jboss application servers. The Windows servers are for AV/DC/Management/Monitoring.
The problem is that intermittent network connectivity to random Windows and Red Hat boxes occur when the Oracle RAC builds up archive logs and then ships / applies them to the secondary nodes, between ESX nodes either on different blades in the same chassis or across the chassis and even when all RAC nodes are on the same ESX host.
We are using NFS, Oracle 11g and Red Hat 6.2.
Sorry if this info is a bit vague, im not an Oracle expert! :-)
thanks,
Dave

Hi,
1.) The calculation for Standby RedoLogs is:
(Max Number of Logfiles per thread (Instance) +1) * Max Number of Threads (Instances))
So if you have 4 Redo Log Groups on your primary (which is 2 Redo Log Groups per Instance), then it ends up:
(2 +1) * 2 = 6
So actually you will only need 6 standby redo logs, not 8. But 2 more don't harm.
Your primary will need exactly the same number (6 or in your case 8). Which will be 3 per thread/instance or in your case 4.
2.) The SID List in the listener.ora is a listing of SIDs the Listener is listening on. It is not the listener name.
Hence it is not "lsnrctl guard_dgmgrl start" but only "lsnrctl LISTENER start", whereas the LISTENER is the default and "lsnrctl start" would be sufficient.
However since this is grid infrastructure with the listener running out of ASM home, be sure to have set your environment to GI Home not to DB_HOME for the listener.ora entries, but to DB_HOME for the tnsnames.ora entries necessary for data guard.
And since listener is running under clusterware you should use "srvctl stop listener" and start.
Last but not least the SID entries for dataguard have to use DGMGRL not dgmgrl.
3.) Here is the whitepaper you are looking for:
www.oracle.com/goto/maa
Also for client failover best practices.
(Here the direct link to the RAC whitepaper):
http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimarysingleinstance-131970.pdf
However since this is 10g you should combine this with the 11g RAC standy paper (e.g. SCAN Listener setup).
Sebastian

Data Guard Setup

I am trying to set up data guard 10g R2 on RHEL 5.
I was able to successfully set up one. What I did is i followed this blogger:
Data Guard Configuration Example - (Oracle 10g, Physical Standby) by Jeff Hunter, Sr. Database Administrator on http://www.idevelopment.info/
What I did is i installed RHEL 5 on 2 servers. Then I installed database software on both servers. Then on both servers, i used dbca to create database on each server. Am I correct? Since my data guard is working now as verified on testing. what i did is:
-install oracle software and create database on node 1
-install oracle software and create database on node 2
-transformed database on node 2 into physical standby database.
Is this also correct?
I am hearing that i can also create data guard (with physical standby database) using the setup:
- install oracle software and create database on node 1
-install oracle software only on node 2
-create physical standby database on node 2 using the database in node 1.
Any recommendations or am i doing correctly?

Ah, I may have explained incorrectly what I actually did .
What I did is,
- I created a database called test1 in node1 (general purposewith datafiles).
- Then on my node2, I created another database named test2 in node2 (custom databaseno datafiles).
- Node1 and Node2 has the same structures (except some paths which has .../test1/... and .../test2/...).
- Then I used RMAN to clone the database in node1 to node2.
These are my commands:
node2] rman target sys/oracle@test1 auxiliary sys/oracle@test2
RMAN> duplicate target database for standby;
So I believe what I did is also correct since I restored my test1 database in node1 into test2 database in node2. So I believe, my test2 database is an RMAN clone of my node1 database.
Edited by: 859640 on May 24, 2011 7:44 PM

Data Guard - Change IP Address

I need to move two 10g R1 Data Guard servers to a new colo. This means they will need different IP addresses. I have searched for any info related to this, but did not find much.
Is there anything special that needs to be done because it is a Data Guard configuration or is making the neccessary OS changes enough? Thanks.

there shouldn't be any issue if you've been using hostname to refer the servers.
just make sure the DNS is in sync
if you have any hard coded ip address in your configure file like other post mentioned, then you need to change them manually.

Veritas Hardware Cluster and Oracle Data Guard

Hi,
Actually we use Veritas Cluster Server for our Database Configuration. So we have a hardware standby cluster. In case of a failure the VCS does a failover, as you know ;-)
But now we are planning to use DataGuard for having a logical standby database for reporting cases. I just read something about a VERITAS CLUSTER SERVER AGENT for DataGuard.
What do I have to do (is there a possibility without using the Veritas Agent) for having a standby failover solution with Veritas and also a DataGuard Configuration.
What is going to happen if the Cluster does a failover? Will the Data Guard configuration be alive or is it going to break?
Please give me some advice. Maybe you have some links for articles that handle this topic.
Thank you very much in advance,
Henrik Ruenger

In terms of feasibility, yes, you can definitely have a database running on a Veritas Cluster Server and (at the same time) a Data Guard physical standby database.
If you are mentioning "VERITAS CLUSTER SERVER AGENT for DataGuard" by Symantec, I don't know the product in details.
What I can say is that you are definitely able to monitor and administer an Oracle Data Guard configuration by using just products that come with the Oracle licence.
In case of a failover, as long as your Oracle Net setup is resilient to the failover, Data Guard is as well. So, the short answer is: no it is not going to break.
I have setup this architecture several times with no problem.
Of course this is just high level.
Please let me know if you need more high level info.
Thanks and regards,
Corrado

DB2 data guard (oracle)

SAP : R/3 ECC 6.0
db : db2
os : linux suse
hclsap:db2hcd 52> db2licm -l
Product name:                     "DB2 Enterprise Server Edition"
License type:                     "Trial"
Expiry date:                      "03/21/2010"
Product identifier:               "db2ese"
Version information:              "9.1"
Annotation:                       "-5;(_t)"
Linux hclsap 2.6.16.60-0.21-smp #1 SMP Tue May 6 12:41:02 UTC 2008 x86_64 x86_64 x86_64 GNU/Linux
Question : Is there any possibility of Data guard (oracle) mechanism possible possible for db2.
I was checking concept of HADR not sure whether possible with SAP bundled version.
How to check whether it is possible with the bundled version of DB2 with SAP 6.0
Pl. guide me

Hi,
Is there any possibility of Data guard (oracle) mechanism possible possible for db2.
YES..Using DB2 HADR..
Please refer following Useful links.
[http://help.sap.com/saphelp_nwpi711/helpdata/en/b9/a961d169c143ecb45262a2b10f149d/frameset.htm|http://help.sap.com/saphelp_nwpi711/helpdata/en/b9/a961d169c143ecb45262a2b10f149d/frameset.htm]
[DB2 HADR in SAP Environment|http://www3.software.ibm.com/ibmdl/pub/software/dw/dm/db2/dm-0508zeng/HADR.pdf]
[DB2 9- Data Recovery and High Availability Guide and Reference|ftp://ftp.software.ibm.com/ps/products/db2/info/vr9/pdf/letter/en_US/db2hae90.pdf]
[Technical Comparison of DB2 HADR and Oracle Data Guard|ftp://ftp.software.ibm.com/software/data/pubs/papers/hadr-comp.pdf]
I was checking concept of HADR not sure whether possible with SAP bundled version.
SAP OEM License includes HADR license as a part of DB2 License.
Please refer [SAP Note 1260217 - DB6: Software components contained in DB2 license from SAP|https://service.sap.com/sap/support/notes/1260217].
Regards,
Bhavik G. Shroff

Data Guard Info

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