Recomendation: RAC + ASM + Data Guard

Hi all:
I need to implement a Data Guard in my 2 nodes RAC Database.
How I make the ASM instance in the remote host?? I'm not found any documentation...
Please, any sugestion.
Thanks a lot.

Use the same installation procedure as you used for RAC.
Check these example instructions for Linux.
:p

Similar Messages

Any Benefits of Extended RAC Over Data Guard?

Hi,
My company is in the process of setting a second data center, a bit far from the current one (about 20 KM).
This Data Center will be used as a DR site, as well as to accommodate additional servers since the current Data Center is already stretched.
We're currently running about 5 RAC clusters, two nodes each on Oracle 11g and on AIX plaforms. It's not yet decided what type of technology will be employed with the databases - whether RAC with Data Guard (DG) or Extended RAC.The network link will be fairly good, a dark fiber link.
Does anyone have a suggestion as to which of the above technology would be preferable? With Extended RAC I think we are able to continue operating from the second site without needing to 'failover' as such, while with DG, we probably will need to put in place an elaborate failover procedure, even though we can use the Fast-Start-Automatic failover feature of 10g Rel2 and above.
Any thoughts/suggestions/clarifications?
Dula
Edited by: dula on Aug 28, 2009 2:47 PM

Hi Dula,
Even some time back we were also consdering the same to use remote DG for disaster recovery solution (active-passive) to create extended RAC on a remote site and then make use of those remote servers for the purpose of disaster reocovery and also make those servers connect to the PROD application servers thus making a (active-active) clustering solution.
Management wanted to look into the feasibility of using active-active nodes on remote sites which they thought will help them make use of remote servers to connect to the LIVE applicatio. With the active-passive mode where there was just standby servers in recovery mode on remote site they were of the opinion that why to waste power for remote servers and why not use them in LIVE site.
We thought of using the dense optic fiber for the DB replication to remote RAC nodes and also for our 30+ application servers to connect from site 1 to site 2( site 2 will be remote site with extented rac nodes hosted).
However there were many reservations that came which making decission. First was that we could not find any reliable source of group who had successfully implemented this active-active remote extended rac nodes in production. The cost of dense optic fiber was another consideration. How the interconnects will perform in remote sites was another grey area for us. Also since the application servers uses TAF to connect to DB servers it was not known that how the sessions from the same application servers(web based applications) to local and remote nodes will have performance impact. With so many grey areas we dropped the idea of using extended rac nodes and went ahead with DG solution.
Amar

Implemeting 11gR2 RAC with Data Guard

Hi ,
Could any one provide the steps on how to setup 11gR2 two node RAC With Dataguard . Could the 11R2 Active database duplication can be used in setting up the standby ?
I just need the order of steps to be followed to set up the environment.
Thanks,
shashi.

Hi Fiedi ,
Thanks for the reply .
I know how to build the oracle dataguard . But , I'm looking for the order of steps that I need to follow to build 11gR2 RAC with data guard.
1] Set up the Grid Infrsatructure for the 2 node RAC .
2] Create the database .
3] Modify the init.ora prameter to chage the above created database as primary .
4] Set up the grid infrastructure for the 2 node RAC on the DR site.
5] Create the standby database using 11gR2 active database dupication.
Is the above order correct ? If not , let me know the correct order of steps that needs to be followed to setup 11gR2 RAC with dataguard.

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

R12 - RAC or Data Guard ????

Hi,
Can anybody tell which version of R12 good.
One of our clients wants to implement only HRMS module.
Can anybody suggests me the severs (H/W requirements).
Which is good Data Gurad / RAC ..
Thanks

Hi,
Please install the latest available version, that is Release 12.1.2 (as of now)
_Oracle E-Business Suite Readme, Release 12.1.2 [ID 949406.1]_
Oracle E-Business Suite Release 12.1.2 is currently available on My Oracle Support as Patch 7303033. This patch needs to be applied on top of
Oracle E-Business Suite Release 12.1.1
Refer the following document with respect to HRMS Module :-
_Known HRMS Issues for 12.1.2 Maintenance Pack [ID 972562.1]_
With respect to High availabiliy RAC/Dataguard
============================
Refer the following documents :-
_Oracle E-Business Suite Release 12 High Availability Documentation Roadmap [ID 1072636.1]_
_Using Oracle 11g Release 2 Real Application Clusters and Automatic Storage Management with Oracle E-Business Suite Release 12 [ID 823587.1]_
_Business Continuity for Oracle E-Business Release 12 Using Oracle 11g Physical Standby Database [ID 1070033.1]_
Hardware Requirements
===============
Because there are different product combinations, different user profiles, and different configurations, there is no one sizing answer for all hardware platforms. Some
hardware vendors have sizing worksheets that model the CPU and memory requirements of Oracle Applications on their hardware. The most reliable strategy to ensure that the hardware is sized appropriately is to install a test environment, and then set a benchmark with a configuration, product mix, and user load that simulates your own current and expected workloads. These "actual" conditions can help verify performance before you install your production-ready environment. If such a benchmark is not feasible, Oracle Consulting Services and your hardware vendor can help you find another Oracle Applications system running a product mix and user profile similar to yours.
- Famy
Edited by: user600239 on 29 May, 2010 11:25 PM

Oracle11g R2 Active Data guard using ASM Problem?

I have configured oracle11g r2 RAC on 2 notes using ASM Grid ( OS unix).
RAC is up and running.
Now I am configuring Active data Guard.
Under grid user instance +ASM and listener is running.
Under oracle user static listener is running.
All disk is mounted.
Oracle RAC and Data Guard directory and structure I have keeped same.
Now my problem is below:
$ ./rman target sys/HPinvent123nbl@dcpdb AUXILIARY sys/HPinvent123nbl@drpdb
Recovery Manager: Release 11.2.0.1.0 - Production on Wed Jan 16 16:28:32 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: DCPDB (DBID=316773134)
connected to auxiliary database: DRPDB (not mounted)
RMAN> duplicate target database for standby from active database;
Starting Duplicate Db at 16-JAN-13
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=5644 device type=DISK
contents of Memory Script:
backup as copy reuse
targetfile '/u02/app/oracle/product/11.2.0/dbhome_1/dbs/orapwdcpdb1' auxiliary format
'/u02/app/oracle/product/11.2.0/dbhome_1/dbs/orapwdrpdb' ;
executing Memory Script
Starting backup at 16-JAN-13
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1897 instance=dcpdb1 device type=DISK
Finished backup at 16-JAN-13
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 01/16/2013 16:28:48
RMAN-06136: ORACLE error from auxiliary database: ORA-00200: control file could not be created
ORA-00202: control file: '+data'
ORA-17502: ksfdcre:4 Failed to create file +data
ORA-15001: diskgroup "DATA" does not exist or is not mounted
ORA-15055: unable to connect to ASM instance
ORA-01031: insufficient privileges
RMAN>
Please help.\
Thanks
Solaiman

root@drpdb1 []# id oracle
uid=108(oracle) gid=700(oinstall) groups=701(dba)
root@drpdb1 []# id grid
uid=109(grid) gid=700(oinstall) groups=701(dba),702(asmdba)
Edited by: 876149 on Jan 16, 2013 3:19 AM

About Data Guard - Physical Standby Database

Dear All,
I have read many documents regading Data Guard.
I am about to setup Data Guard in our current environment but want to clear few tings.
I have a confusion between physical and logical standby database.
What I have read from different documents is:
-Physical Standby Database in (11g)
1) It is the most efFicient
2) I can be either in mount or open state
3) Select queries and reporting can be done to improve performance of the primary database.
4) Schema on primary and standby database is always the same
-- Logical Standby Database
1) You can create additional tables, indexes, etc.
2) Always in open mode
3) Select queries and reporting can be done to improve performance of the primary database
Now our scenerio is, that we have one server at the moment, OS is linux and operating system is 11g. We want to setup an other server in another country, will also be 11g on Linux in a way that it acts as standby/backup server. Schema and data is always the same. In case due to unavailability of primary server, standby server acts as the primary server (This has to be automated). The reason for unavailability could be any like maintenance work on primary server, network or hardware failure at primary server. The last and the most important thing is that users from this country where we will setup standby database will insert/update data on the primary server BUT queries and reporting will be done from this newly created standby data.
Kindly recomend the best Data Guard in this scenerio and kindly correct me where I am wrong.
Thanks, Imran

A logical standby has various limitations on things like data types. It's also a much more complex architecture, which makes it more likely that something will break periodically and require attention. Applying redo to a physical standby is code that has been around forever and is as close to bullet-proof as you'll get. And you would generally prefer to fail over to a physical standby-- if you do things like create new objects in the logical standby, you may have to get rid of those objects during a failover to get acceptable OLTP performance.
Justin

Data Guard configuration for RAC database disappeared from Grid control

Primary Database Environment - Three node cluster
RAC Database 10.2.0.1.0
Linux Red Hat 4.0 2.6.9-22 64bit
ASM 10.2.0.1.0
Management Agent 10.2.0.2.0
Standby Database Environment - one Node database
Oracle Enterprise Edition 10.2.0.1.0 Single standby
Linux Red Hat 4.0 2.6.9-22 64bit
ASM 10.2.0.1.0
Management Agent 10.2.0.2.0
Grid Control 10.2.0.1.0 - Node separate from standby and cluster environments
Oracle 10.1.0.1.0
Grid Control 10.2.0.1.0
Red Hat 4.0 2.6.9-22 32bit
After adding a logical standby database through Grid Control for a RAC database, I noticed sometime later the Data Guard configuration disappeared from Grid Control. Not sure why but it is gone. I did notice that something went wrong with the standby creation but i did not get much feedback from Grid Control. The last thing I did was to view the configuration, see output below.
Initializing
Connected to instance qdcls0427:ELCDV3
Starting alert log monitor...
Updating Data Guard link on database homepage...
Data Protection Settings:
Protection mode : Maximum Performance
Log Transport Mode settings:
ELCDV.qdx.com: ARCH
ELXDV: ARCH
Checking standby redo log files.....OK
Checking Data Guard status
ELCDV.qdx.com : ORA-16809: multiple warnings detected for the database
ELXDV : Creation status unknown
Checking Inconsistent Properties
Checking agent status
ELCDV.qdx.com
qdcls0387.qdx.com ... OK
qdcls0388.qdx.com ... OK
qdcls0427.qdx.com ... OK
ELXDV ... WARNING: No credentials available for target ELXDV
Attempting agent ping ... OK
Switching log file 672.Done
WARNING: Skipping check for applied log on ELXDV : disabled
Processing completed.
Here are the steps followed to add the standby database in Grid Control
Maintenance tab
Setup and Manage Data Guard
Logged in as sys
Add standby database
Create a new logical standby database
Perform a live backup of the primary database
Specify backup directory for staging area
Specify standby database name and Oracle home location
Specify file location staging area on standby node
At the end am presented with a review of the selected options and then the standby database is created
Has any body come across a similar issue?
Thanks,

Any resolution on this?
I just created a Logical Standby database and I'm getting the same warning (WARNING: No credentials available for target ...) when I do a 'Verify Configuration' from the Data Guard page.
Everything else seems to be working fine. Logs are being applied, etc.
I can't figure out what credentials its looking for.

Steps for data guard RAC primary RAC standby

Hi,
I have some doubt in configuring data guard for rac DR to rac primary.
1) In RAC DR, physical standby will be in RAC before starting data guard for RAC Primary , right?.
2) While configuring RAC DR , should one node be down in standby?.
3) After creating the auxiliary database in standby, i mean restoring the rman backup from staging directory in DR,
Shall we have to register the services(database,instance,asm,etc..) to CRS(OCR)?. If yes ,Why?.
4) After DR configure over , Shall i shut/down one node?. Should all the nodes in DR be in up , while applying logs to
standby ?.
If anybody have made the setup and have the prepared document , requesting you to share with me.
Thank you very much,
Sunand

Hi Sunand,
Please follow the following My Oracle Support (MOS) Document ID:
MAA - Creating a RAC Physical Standby for a RAC Primary [ID 380449.1]
For further details, see the referred documents in previous post. Try practicing on VMWare because it will give you the flexibility for creating snapshots to save your work. Please see the answers for your question below:
Q1. In RAC DR, physical standby will be in RAC before starting data guard for RAC Primary , right?.
Answer: Yes, this is recommend but not mandatory. You can add a second node later on.
Q2. While configuring RAC DR , should one node be down in standby?
Answer: Yes, there are some database configuration commands that should be run in exclusive mode. You can start the remaining instance(s) after DB creation. Do not forget to set CLUSTER_DATABASE parameter to TRUE. Also, all instances except one should be close while performing switchover/failover.
Q3. After creating the auxiliary database in standby, i mean restoring the rman backup from staging directory in DR, Shall we have to register the services(database,instance,asm,etc..) to CRS(OCR)?. If yes ,Why?
Answer: Yes, this is recommended for RAC configuration to take advantage of high availability services.
Q4. After DR configure over , Shall i shut/down one node?. Should all the nodes in DR be in up , while applying logs to
standby ?
Answer: You can start up all the instances after DR creation. In this case if your one node goes down log apply services will continue to apply changes in DR.
Hope, this helps to clear your questions.
Regards,
Shahid

Data Guard: db_file_name_convert/log_file_name_convert when using ASM/OMF

All,
I have a call currently open with Oracle regarding the setting of the parameters db_file_name_convert and log_file_name_convert in a data guard environment. We use ASM / OMF for storage and file naming and my question is basically do these parameters have to be set. The documentation says they do where the file structure is different between PRIMARY and STANDBY.
I have successfully tested failover and switchover without these parameters. I have also added a new tablespace on the PRIMARY and watched it create a new OMF datafile on standby when the logs are switched.
I just can't see a reason for setting them when using ASM / OMF.
I'm hoping someone can enlighten me here because I'm getting nowhere whith support. The following is our Data Guard setup:
PRIMARY
DB_NAME=IBSLIVE
DB_UNIQUE_NAME=IBSLIVE
ASM Disk Groups:
+PRODDATA (Data Files, Control Files, Redo Logs)
+PRODFLASH (Archive Logs, Flashback Logs, RMAN backups)
+PRODLOGS (Multiplexed Control & Redo Logs)
STANDBY
DB_NAME=IBSLIVE
DB_UNIQUE_NAME=IBSDR
ASM Disk Groups:
+DRDATA (Data Files, Control Files, Redo Logs)
+DRFLASH (Archive Logs, Flashback Logs, RMAN backups)
+DRREDO (Multiplexed Control & Redo Logs)
Many Thanks,
Ian.

Ian,
I'm having similar thoughts.
I have created a new instance with files in asm under +datadisk/obosact (this is the smae name as primary)
I then modify the db_unique_name from obosact to obosactdr as is required for standby to work
When I recover (duplicate target database for standby; ) I find that the files are in datadisk/obosactdr not in the datadisk/obosact area
I found this reference http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10g_RACPrimaryRACPhysicalStandby.pdf
4. Connect to the ASM instance on one standby host, and create a directory within the DATA disk group that has the same name as the DB_UNIQUE_NAME of the standby database. For example: SQL> ALTER DISKGROUP data ADD DIRECTORY '+DATA/BOSTON';
This step seems to indicate that the location of the files is determined by the db_unique_name not the db_file_name_convert paramenter
DId you ever resolve the issue?

Data guard performance problem (rac to single instance)

i have a table it has GPS data, and gps table has too many data, 5 millions,
iam using RAC (2 nodes 11gr2). standby database is single instance data guard,
single instance database (standby)'s hardware cpu is lower than RAC machines. rac nodes have (15k) disks, standby has (7200rpm),
so i dont want to use GPS tables on data guard system, i dont want to run GPS table's DML commands (delete, insert), i think it may increase performance,
is it posible? what is your advise?
any feedback makes me happy,
best regards

it's not possible with data guard, but you can use streams or golgengate for this purpose. Have a look at dataguard performance tuning guide. Maybe there is something you can fix on the configuration to be faster.
[Data Guard Redo Apply and Media Recovery Best Practices|http://www.oracle.com/technetwork/database/features/availability/maa-wp-10grecoverybestpractices-129577.pdf]
[Redo Transport and Network Best Practices|http://www.oracle.com/technetwork/database/features/availability/maa-wp-11gr1-activedataguard-1-128199.pdf]
I don't know an 11g version for these docs but they would still help.

Using RAC One Node as a primary database in a Data Guard configuration

Is it possible to use RAC One Node as a primary database in a Data Guard configuration ?
Oracle doc states: "Supports Oracle Data Guard such that you can run physical or logical standby databases on it or even we can NOT run primary databases on it either if the primary databases have DG"
I guess it is not possible but can you folks confirm?
Alessio

Hmmm.... still unclear.
I've submitted a comment which the documentation team should pick up :
"+This sentence : "Supports Oracle Data Guard such that you can run physical or logical standby databases on it or even we can NOT run primary databases on it either if the primary databases have DG"+
+is not very clear.+
+I can understand it upto the words "on it" but the second part of the sentence, beginning with "or even we can NOT ..." seems mangled and unclear.+
+Can you clarify whether RAC One Node can be used as :+
+a. A Primary in a DataGuard configuration+
+b. A Standby in a DataGuard configuration ?+"
Hemant K Chitale

Listeners Problem oracle11g R2 Data Guard RAC?

Hi,
I want to Static Register LISTENERDB in Data Guard RAC.
LSNRCTL> start listenerdb
Starting /u02/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...
TNSLSNR for HPUX: Version 11.2.0.1.0 - Production
System parameter file is /u02/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Log messages written to /u02/app/oracle/diag/tnslsnr/drpdb1/listenerdb/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENERDB)))
TNS-01155: Incorrectly specified SID_LIST_listenerdb parameter in LISTENER.ORA
NL-00303: syntax error in NV string
Listener failed to start. See the error message(s) above...
LSNRCTL>
Listene.ora file: user Oracle
LISTENERDB=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENERDB)))) # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENERDB=ON # line added by Agent
SID_LIST_LISTENERDB =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME = /u02/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = drpdb1)
(GLOBAL_DBNAME = drpdb.nblitd.com)
Please help
Thanks
Solaiman

Hi,
Please check below thread. Seems like same problem.
http://www.orafaq.com/forum/t/87764/2/
Cheers
Sush

Create Data Guard Using ASM Managed RMAN backup

we have an oracle database 11.1.0.7 working on Windows server 2003 (64bit). The storage in ASM managed (same 11.1.0.7). Our total database size is 4TB.
I will have to create a physical standby database (Data Guard) of this instance. Now I am having issues on how to transport my RMAN backup pieces (which is also ASM managed).
I cannot do an over the network RMAN backup because it will take months to complete.
We have external 4 hard disks (2 TB each). But my RMAN backup pieces are ASM in format.
Any ideas on how to easily create a data guard in this set up.

TheAlchemist wrote:
can you provide us any clear steps....Hope you asked for Restoring from backups.
1) Prepare PFILE and put in nomount status.
2) Restore standby controlfile
RMAN> restore standby controlfile from '+DG/...'
3) Mount controlfile
SQL> alter database mount standby database;
4) Restore database.
If you are restoring into another diskgroups, then use as below.
RUN {
SET NEWNAME FOR DATAFILE 1 TO '+Dg1/....';
SET NEWNAME FOR DATAFILE 2 TO "+Dg1/...';
RESTORE DATABASE
If same diskgroup you want to use then, just give RMAN> restore database;
After successful restore
5) Start MRP
SQL> alter database recover managed standby database disconnect from session;

Data guard setup for 2 node RAC primary to 2 node RAC standby

Hi All,
I am going to setup data guard for 2 node RAC primary to 2 node RAC standby on Oracle 10.2.0.4. in AIX5L.
Can you please provide the document on the above setup which is having all the steps (details).
Also, the documents on different scenarios like
1) If one node of standby goes down, how the redo logs will be applied. IS there any problem?
2) If both nodes of standby are failed, how to reciver them?
3) If one node of primary fails, is there any issue?
4) If two nodes of primary fails, is there any issue?
Thanks in advance,
Mahi

Have a look at the following location, you may find some similar documents:
http://www.oracle.com/technology/deploy/availability/htdocs/maa.htm
By
http://www.oraxperts.com

Recomendation: RAC + ASM + Data Guard

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