RAC DB failover from one Datacenter to Standby site

Hi,
I have 2 node 10gR2 RAC cluster running on Linux with ASM and E-business suite is configured with this 10gR2 RAC DB. Would like to setup standby site with single instance and not go with RAC for now until we procure additional hardware. Also no plans in setting up DG as solution. Does anyone has similar setup? During failover we have the capability to migrate the VIP's (names) to the failed DC but the IP's will change since there is no L2 extension b/w DC's to retain the same IP. Synchronous replication is setup at disk level using EMC SRDF
Question:
1) Will i be able to bring up the RAC DB in single instance node at second DC using non-rac code tree? IF so can anyone share whitepaper/docs on how to bring up RAC db as non-RAC environment. Logically i think it should work if i have right spfile with no RAC specific parameters.. Would like to hear from experts.
2) Wanted to minimize the configuration changes at the E-business suite level since we plan to bring the VIP's over to failed DC.
3) Does the crs registry manages information about VIP name to IP address? since my IP address will change when i migrate the VIP name from one DC to other DC. Will it be relevant at all since we plan to bring up the db in single instance mode at the failed over DC?
Any help is appreciated
Thanks

1) When you say you want to have it in a non-RAC mode. what do you mean, your current DR is a RAC however during disaster you want it to be in a non-RAC mode. Yes it would be possible, you can turn off the CLUSTER_DATABASE parameter to FALSE and bring the database as a single instance database. with this option you still will have the RAC features such as dictionaries etc however not used. the other option of completely turning of the RAC feature and getting it back to a single instance configuration may require additional steps.
which ever method you pick, you should consider the workload, will this single instance be able to handle the entire workload that originally existed on a RAC configuration.
2) VIPs dont failover outside the RAC cluster. the method normally followed is to have a database service configured on the primary and as part of a database startup trigger ensure that the database service is enabled on the DC site. There is a paper on OTN on how to do this.
3) Yes, the VIP information is stored in the OCR file.

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Environment: 4 node RAC
Version: 11.1.0.7
Storage : ASM (Oracle ASM library)
DB size : 3TB
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user8860934 wrote:
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Failover From one Pool to Another Pool Paired VS Features Available

Hello Guys,
I like to ask about failover and features available during fail over.
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http://masteringlync.com/2012/07/26/understanding-lync-2013-server-failover/
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Hi *,
I needed a script which enables root on "host 2" to configure another IP to a virtual network interface. This is used in case of unavailability of the origin IP owner (host 1).
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How to failover SCAN VIP and SCAN Listener from one node to another?

Environment:
O.S : HP-UX B.11.31 U ia64
RDBMS: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
It is a 2 Node RAC.
Question:
How to failover the SCAN VIP and SCAN LISTENER running on node 1 to node 2?
What is the relation between standard LISTENER and SCAN LISTENER ?
Why do we need LISTENER, when we have SCAN LISTENER ?
When I tried with SRCVTL STOP LISTENER , I thought the SCAN LISTENER adn SCAN IP will failover, but it did not?
Also please clarify if I use SRVCTL RELOCATE SCAN -i 1 -n Node1
Actalluy I am trying that by moving the SCAN listeners so that when I do PSU 7 patching on 1 node, no incoming attempt to connect will spawn
a process and thereby opening files in $ORACLE_HOME (which would prevent the patch from occurring)
Please clarify my queries.
Thanks, Sivaprasad.S

Hi Sivaprasad,
1. The following link will help you for SCAN VIP and SCAN LISTENER failover from 1 node to another.
http://heliosguneserol.wordpress.com/2012/10/19/how-to-relocate-scan_listener-from-one-node-to-another-node-on-rac-system/
http://oracledbabay.blogspot.co.uk/2013/05/steps-to-change-scan-ip-address-in.html
2. The Standard LISTENER is specific for particular node for which it is running. It cannot be relocated as its specific for the node its running. SCAN listeners are not replacements for the node listeners.A new set of cluster processes called scan listeners will run on three nodes in a cluster (or all nodes if there are less than 3). If you have more than three nodes, regardless of the number of nodes you have, there will be at most three scan listeners. So no relation for standard LISTENER and SCAN LISTENER.
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4. If you provide SRCVTL STOP LISTENER, it stops the default listener on the specified node_name, or the listeners represented in a given list of listener names, that are registered with Oracle Clusterware on the given node. No failover will happen under this case.
5. Yes you can relocate if you want to relocate the scan.
Hope this helps!!
Regards,
Pradeep. V

11.2.0.3 RAC ASM Pri with Normal FileSys Active Standby Post Failover

The architecture consist of two node rac asm primary and one normal filesystem active standby all on Oracle 11gR2 11.2.0.3. With basic Broker Configuration.
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DGMGRL> show configuration verbose;
Configuration - DG_PRI_CFG
Protection Mode: MaxPerformance
Databases:
STANDBY - Primary database
Warning: ORA-16829: fast-start failover configuration is lagging
KEMETRAC - (*) Physical standby database
Error: ORA-16810: multiple errors or warnings detected for the database
(*) Fast-Start Failover target
Properties:
FastStartFailoverThreshold = '95'
OperationTimeout = '30'
FastStartFailoverLagLimit = '95'
CommunicationTimeout = '180'
FastStartFailoverAutoReinstate = 'TRUE'
FastStartFailoverPmyShutdown = 'TRUE'
BystandersFollowRoleChange = 'ALL'
Fast-Start Failover: ENABLED
Threshold: 95 seconds
Target: KEMETRAC
Observer: emcc.respecti.com
Lag Limit: 95 seconds
Shutdown Primary: TRUE
Auto-reinstate: TRUE
Configuration Status:
ERROR
I've found a recommendation to increase the value of FastStartFailoverThreshold='90';
Though I continue to encounter the above configuration error.
Recommendations are appreciated!
Edited by: 783527 on Mar 12, 2012 7:41 PM

03/13/2012 13:13:22
Data Guard Broker Status Summary:
Type Name Severity Status
Configuration DG_PRI_CFG Warning ORA-16607
Primary Database STANDBY Warning ORA-16829
Physical Standby Database KEMETRAC Error ORA-16810
03/13/2012 13:14:22
Data Guard Broker Status Summary:
Type Name Severity Status
Configuration DG_PRI_CFG Warning ORA-16607
Primary Database STANDBY Warning ORA-16829
Physical Standby Database KEMETRAC Error ORA-16810
03/13/2012 13:15:22
Data Guard Broker Status Summary:
Type Name Severity Status
Configuration DG_PRI_CFG Warning ORA-16607
Primary Database STANDBY Warning ORA-16829
Physical Standby Database KEMETRAC Error ORA-16810
03/13/2012 13:16:22
Data Guard Broker Status Summary:
Type Name Severity Status
Configuration DG_PRI_CFG Warning ORA-16607
Primary Database STANDBY Warning ORA-16829
Physical Standby Database KEMETRAC Error ORA-16810
03/13/2012 13:17:22
Data Guard Broker Status Summary:
Type Name Severity Status
Configuration DG_PRI_CFG Warning ORA-16607
Primary Database STANDBY Warning ORA-16829
Physical Standby Database KEMETRAC Error ORA-16810
03/13/2012 13:18:22

How to move Tablespace from One disk group to another disk group in RAC

Hi All,
I have 11gR2 RAC env on Linux.
As ofnow I have problem with disk group. I have 3 disk group which is almost full - 98%. I have added one NEW disk group and want to move some of the Tablespace(TBS) from OLD disk group to NEW diskgroup and make some free space in OLD disk group.
Can any one suggest me how to move TBS from one disk group to another disk grup without shutting down the instance.
DB is in Noarchive mode.
Thanks...

user12039625 wrote:
Hi Helios,
Thanks for doc id but I am looking for noarchive mode solution. becaues I got ORA-
"ORA-01145: offline immediate disallowed unless media recovery enabled " when run alter database datafile '...' offline.
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1- put tablespace offine
2- Copy the file to new diskgroup using Either RMAN or DBMS_FILE_TRANSFER.
3- Rename the file to point to new location.
4- Recover the file.
5- Bring the file online.
I had move 240M TBS from OLE to NEW.
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Thanks :)I have doubt in my mind:
1. You database is in noarchivelog mode
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RAC-DATA FILE ACCESSING ISSUE FROM ONE NODE

Dear All,
We have a two node RAC (10.2.0.3)running on Hp Unix. From yesterday onwards, from one instance accessing data from a specific data file showing the below error, whereas accessing from other node to the same datafile is working properly.
Errors in file /oracle/product/admin/tap3plus/bdump/tap3plus4_dbw0_24950.trc:
ORA-01157: cannot identify/lock data file 75 - see DBWR trace file
ORA-01110: data file 75: '/dev/vg_rac/rraw_tap3plus_temp_live05'
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HPUX-ia64 Error: 19: No such device
Additional information: 2
Tue Jan 31 08:52:09 2012
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ORA-01157: cannot identify/lock data file 75 - see DBWR trace file
ORA-01110: data file 75: '/dev/vg_rac/rraw_tap3plus_temp_live05'
Tue Jan 31 08:52:09 2012
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Thanks in Advance

user585870 wrote:
We have a two node RAC (10.2.0.3)running on Hp Unix. From yesterday onwards, from one instance accessing data from a specific data file showing the below error, whereas accessing from other node to the same datafile is working properly.That would be due to some kind of failure in the shared storage layer.
RAC needs the very same storage layer to be visible and available on each RAC node - thus this needs to be some form of shared cluster storage.
Should a piece of it fails on one node, that node would not be able to access the RAC database files on that shared storage layer - and will throw the type of errors you are seeing.
So how does this shared storage layer look like? Fibre channels (HBAs) connected to a Fibre Channel Switch and SAN - making SAN LUNs available as shared storage devices?
Typically a shared storage failure would throw errors in the kernel log. This is because the error is not an Oracle error, but a kernel error. As it is in your case. The bottom error on the error stack points to the root cause:
ORA-01157: cannot identify/lock data file 75 - see DBWR trace file
ORA-01110: data file 75: '/dev/vg_rac/rraw_tap3plus_temp_live05'
ORA-27041: unable to open file
HPUX-ia64 Error: 19: No such device
So HP-UX on that node is not seeing a specific shared storage device.

What is the best approach to migrate SharePoint farm from one data center to other datacenter

We have two web front server and one application server and two instances for database server and we have to migrate complete farm from one data center to other data center with minimal downtime and end user impact.
Please provide your best input on this.
Thanks in advance.

Create a new farm in the secondary Data Center at the same patch level with the desired configuration. Replicate the databases using the method of choice (Mirroring, AlwaysOn, etc.). Create a downtime window where you can then attach the databases to the
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Trevor Seward
Follow or contact me at...
&nbsp&nbsp
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Oracle Forms 10g runtime handling during RAC node failover.

Hi,
Forms version 10g R2 (10.1.2.0.2)
Oracle DB version 10g R2 RAC with 3 nodes.
If the RAC DB node that the user is connected to goes down, the user gets FRM-40733 and ORA-03114 error messages and the client forms application gets locked down/ goes in a loop with the error messages. The user has to close the browser to get out of the loop. I understand that this is the expected behaviour, but I'm wondering whether we can trap the error ORA-03114 and fire the "key-exit" trigger to get out of the application.
Have any one implemented a clean way to exit the Forms application when the RAC DB node goes down..?
I'm looking for some suggestions or an elegant way to handle the above failure.
Thank you in advance.
Sudhakar

Glen,
I haven't solve this one yet.I have been playing around with the following:
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My clients are XP, NT, 2000.
I have the forms/report runtime installed on their PCs.
Their TNSNAMES.ORA will be pointing to PRIMARY ( PDB)
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On the standby
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AFTER DB_ROLE_CHANGE ON DATABASE
DECLARE
role VARCHAR2(30);
dbname varchar2(100);
BEGIN
SELECT
DATABASE_ROLE,
DB_UNIQUE_NAME
INTO
role,
dbname
FROM
V$DATABASE;
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dbms_scheduler.create_job(
job_name=>'move_sqlnet',
job_type=>'executable',
job_action=>'c:\temp\movetns.cmd',
enabled=TRUE
ELSE
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-- need to reverse the step above.
END IF;
END;
As for the movetns.cmd
something like
rem -- attach to the workstation,
net use m: \\station name\share name
rem -- stdb_tnsname.ora would be pointing to STANDBY
copy stdb_tnsname.ora m:\orant\net80\tnsname.ora
net use m: /delete
rem -- need to do that for all workstations..
As you can see, there could be lots of problems with this procedure.
Client doesn't know about the failover, starts a RE-BOOT on the pc, therefore, the new tnsnames.ora will not get to client.. what to do for that client? Do i re-run the batch ...every hour?
tell me if you come up with an answer..
p-

Best way to move redo log from one disk group to another in ASM?

Hi All,
Our db is 10.2.0.3 RAC db. And database servers are window 2003 server.
We need to move more than 50 redo logs (some are regular and some are standby) which are not redundant from one disk group to another. Say we need to move from disk group 1 to 2. Here are the options we are thinking about but not sure which one is the best from easiness and safety prospective.
Thank you very much for your help in advance.
Shirley
Option 1:
1)     shutdown immediate
2)     copy log files from disk group 1 to disk group2 using RMAN (need to research on this)
3)     startup mount
4)     alter database rename file ….
5)     Open database open
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Option 2:
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2)     drop the redo log groups in disk group 1 when they are inactive and have been archived
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Absolutely not, they are not even remotely similar concepts.
OMF: Oracle Managed Files. It is an RDMBS feature, no matter what your storage technology is, Oracle will take care of file naming and location, you only have to define the size of a file, and in the case of a tablespace on an OMF DB Configuration you only need to issue a command similar to this:
CREATE TABLESPACE <TSName>; So the OMF environment creates an autoextensible datafile at the predefined location with 100M by default as its initial size.
On ASM it should only be required to specify '+DGroupName' as the datafile or redo log file argument so it can be fully managed by ASM.
EMC. http://www.emc.com No further commens on it.
~ Madrid
http://hrivera99.blogspot.com

How do the application servers connect the new database after failing over from primary DB to standby DB

How do the application servers connect the new database after failing over from primary DB to standby DB?
We have setup a DR environment with a standalone Primary server and a standalone Physical Standby server on RHEL Linux 6.4. Now our application team would like to know:
When the primary DB server is crashed, the standy DB server will takeover the role of primary DB through the DataGuard fast failover. As the applications are connected by the primary DB IP before,currently the physical DB is used as a different IP or listener. If this is happened, they need to stop their application servers and re-configure their connection so the they coonect the new DB server, they cannot tolerate these workaround.
Whether does oracle have the better solution for this so that the application can automatically know the role's transition and change to the new IP without re-confige any connection and shutdown their application?
Oracle support provides us the answer as following:
==================================================================
Applications connected to a primary database can transparently failover to the new primary database upon an Oracle Data Guard role transition. Integration with Fast Application Notification (FAN) provides fast failover for integrated clients.
After a failover, the broker publishes Fast Application Notification (FAN) events. These FAN events can be used in the following ways:
Applications can use FAN without programmatic changes if they use one of these Oracle integrated database clients: Oracle Database JDBC, Oracle Database Oracle Call Interface (OCI), and Oracle Data Provider for .NET ( ODP.NET). These clients can be configured for Fast Connection Failover (FCF) to automatically connect to a new primary database after a failover.
JAVA applications can use FAN programmatically by using the JDBC FAN application programming interface to subscribe to FAN events and to execute event handling actions upon the receipt of an event.
FAN server-side callouts can be configured on the database tier.
FAN events are published using Oracle Notification Services (ONS) and Oracle Streams Advanced Queuing (AQ).
=======================================================================================
Who has the experience and the related documentation or other solutions? we don't have the concept of about FAN.
Thank very much in advance.

Hi mesbeg,
Thanks alot.
For example, there is an application JBOSS server connecting the DB, we just added another datasource and put the standby IP into the configuration file except adding a service on DB side like this following:
        <subsystem xmlns="urn:jboss:domain:datasources:1.0">
        <datasources>
                <datasource jta="false" jndi-name="java:/jdbc/idserverDatasource" pool-name="IDServerDataSource" enabled="true" use-java-context="true">
                    <connection-url>jdbc:oracle:thin:@<primay DB IP>:1521:testdb</connection-url>
                    <connection-url>jdbc:oracle:thin:@<standby DB IP>:1521:testdb</connection-url>
                    <driver>oracle</driver>
                    <pool>
                        <min-pool-size>2</min-pool-size>
                        <max-pool-size>10</max-pool-size>
                        <prefill>true</prefill>
                    </pool>
                    <security>
                        <user-name>TEST_USER</user-name>
                        <password>Password1</password>
                    </security>
                    <validation>
                        <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>false</background-validation>
                        <use-fast-fail>false</use-fast-fail>
                        <stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleConnectionChecker"/>
                        <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter"/>
                    </validation>
                </datasource>
                <drivers>
                    <driver name="oracle" module="com.oracle.jdbc">
                        <xa-datasource-class>oracle.jdbc.OracleDriver</xa-datasource-class>
                    </driver>
                </drivers>
            </datasources>
        </subsystem>
If the failover is occurred, the JBOSS will automatically be pointed to the standby DB. Additional actions are not needed.

Oracle db Migration from one server to another

Can any body guide me why companies migrate Oracle db from one server to another , & what is the process for doing that?

In that case, something has changed, right? The need to have a standby server has become important.
Next steps:
- define the real business requirements (why do we think we want to spend money on a spare server? why should the money go to a hardware company, instead of an increase in my salary? what benefit are they looking for?)
- see whether any known ideas or alternatives fit the requirements, see whether the backup should be a standby server, a hot failover server, or some other backup mode;
- go to the Oracle Technet site, look under the Product Centers: Database area to see whether there are any related topics (such as 'availability', as one of the logical reasons for a backup is to make the application more avaliable); check in that area for any white papers; read the white papers to formulate an idea, write down interesting keywords;
- look in the Oracle docuentation, list of books, to see whether there are any books specifically dealing with that topic (such as Oracle Data Guard);
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- go to expert and trusted sources (these forums, OraFaq.com), post a plan and ask for feedback.
There are literally dozens of alternatives. Research and find the one(s) that are right for your situation. That includes the technical as well as the financial reasons.
More than anything, that means you need to learn to ask the right question. And that often means asking the same question several different ways, and attempting to answer each variation yourself to see how the answer solves your specific needs.

RAC DB failover from one Datacenter to Standby site

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