How to replicate CDC on Disaster Recovery Database.

I have a scenario here.
In Case you have CDC installed on your main database. The changes are getting captured and you get the changes in the subscriber views.
In case your main database goes down due to some reasons. You cannot access even a single table of the database now you are to take an export dump to be taken to a different database.
In this case there is a disaster recovery database, wherein the tables and the number of records is same as the main database, since it is refreshed every now and then.
Is it possible to replicate the change tables with the archived log files present??
The mode of operation of CDC is Asynchronous Hotlog mode.
Please suggest the alternative for replicating CDC on a separate database, if one database is gone, without any miss in the changes.
Regards,
Uravesh Vora

moz44 wrote:
Hi guys, happy thanksgiving day to you all.
Some people say that it is possible to replicate a derby database running on one host to mysql running on another host. Has any of you have experience with that?That wouldn't be quite the same as for example replication on Oracle to Oracle.
But the following claims that it does what you want. No reason to suppose it doesn't. Look at the license carefully (I didn't look at it at all.) It basically supports any jdbc driver (two one for each source.)
[http://enterprise.replicator.daffodilsw.com/]
I would expect more problems with more complicated databases. But that is true with databases that have built in replication as well.

Similar Messages

Applying archivelogs to test disaster recovery database

Database: 10.2.0.2
OS: RHEL
Goal: (1) To test the ability to rebuild a database using backupset and archivelogs.
(2) To roll forward the test DR database by applying archivelogs from the production database.
I am using rman but not a catalog.
I restored and recovered the production database to a new, separate server, making a second database with the same DBID. I felt proud of myself for a moment.
The production database now has archivelogs past the time of the backup that was restored and recovered to the test DR database. In a simulated production database failure, I want to apply those archivelogs to the DR database in order to roll forward the DR database to the point of failure in the production database. Everyone except me seems to know how to do this. I feel a lot less proud now.
Yes I have read the rman manuals, all of them, and several times - yes, I have read through the forums and read asktom and metalink. I must be unintentionally overlooking some crucial info and concepts.
My production database has generated archivelogs passed the last sequence known to my DR database. I don't know how to tell the DR database to recover these new archivelogs.
Another post on this form directs one to use the command: "recover database until cancel". I get a syntax error. So I tried recover until time, which runs, but does not apply the new archivelogs. Must I update the DR database controlfile with a post-last-backup copy from the production database in order to apply these archivelogs? Must a catalog be used?
Thank you for any assistance.

What seems to work is:
1) to restore the database using the controlfile from the backup,
2) to issue the command 'alter database recover until cancel using backup control file' from sqlplus,
3) to respond to each ORA-00279 with 'alter database recover continue default' also from sqlplus and until all the archivelogs have been applied, including archivelogs with sequences subsequent to the backup, then 'alter database recover cancel'.
4) to issue the command 'alter database open resetlogs'.
The above steps allow the available archivelogs to roll the database forward beyond the point in time recorded at the time of the hot backup.
Metalink Note:161742.1 was helpful determining this information, yet it seems to conflict with Tom Kyte's statement that one should avoid using the backup controlfile whenever possible: http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:894628342039#29824708782039
Perhaps the conflict is due to the difference between a restore/recovery and a restore/recovery to a new server?
Do the above steps seem to be the best practice for restoring/recovering a database to a new server?
Thank you.

Read Only, Disaster Recovery Database

I currently have an 8i standby database that I need to open for read only access 24 hours a day. Using the Oracle facilities, I have to close the database to users to apply the arch redo logs from Live. Is there any tools out there that would allow me to get around this?

Usually you can open a standby db only for query purposes.
Bear in mind that doing this you would stop the log apply process.
Once finished your query activities, you should close again the standby db and apply the log "paused".
This is unnecessary only in version 11g.
Hope this helps.
Regs,
Acr

Disaster Recovery from tape library!

Hi,
I am using oracle 10g and Backup Exec 12 as the media management software. How do i perform the disaster recovery. My entire scenario is like this:
Server A has the DB (Database).
Configured Backup Exec with RMAN and took full DB backup along with autobackup of controlfile to the tape.
Server A crashes and is unusable.
Installs Oracle on server B and needs to restore the DB on this new server.
I know the DBID of the DB but how to configure RMAN to work with Backup Exec, so that I can restore the db from the tape library?
When you configure the RMAN integration with Backup Exec, it finds the database running on the server and will perform the integration. But in my case, since the database does not exist, how will the Backup Exec agent configure the integration?
How do we go about the restoration to Server B in this case?
Thanks!

Hi!
I am still not able to restore the db. The scenario is like:
Took a full database backup to tape from server A with controlfile autoconfig
Trying to restore the db on server B. The following is the script used to restore.
connect target /
set dbid=152417844;
startup nomount;
run
+{+
allocate channel sbt1 type 'sbt_tape';
SEND 'BSA_SERVICE_HOST=ipaddress,NBBSA_TOTAL_STREAMS=1';
set controlfile autobackup format for device type 'sbt_tape' to 'cf_%F';
restore spfile from autobackup;
restore controlfile from autobackup;
alter database mount;
restore database;
recover database;
release channel sbt1;
+}+
alter database open resetlogs;
When i try to restore, the output is:
channel sbt1: looking for autobackup on day: 20090624
channel sbt1: looking for autobackup on day: 20090623
channel sbt1: looking for autobackup on day: 20090622
channel sbt1: looking for autobackup on day: 20090621
channel sbt1: looking for autobackup on day: 20090620
channel sbt1: looking for autobackup on day: 20090619
channel sbt1: looking for autobackup on day: 20090618
channel sbt1: no autobackup in 7 days found
released channel: sbt1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 06/24/2009 11:19:28
RMAN-06172: no autobackup found or specified handle is not a valid copy or piece
Please advice!
Edited by: Libra DBA on Jun 24, 2009 1:39 PM

Disaster Recovery steps for BO

BO XI R2 SP 1
Oracle10g
Windows 2003
We would like to do a drill for BO recovery and need to know what proper steps would be required.
This is so far I understand; if I'm missing something then please advise.
Take backups of Prod CMS, PMDB and Data warehouse schemas
Restore all these schema's in the DR (disaster recovery) database
Now the issue is when we restore CMS; it shows Prod server information and Infoview doesn't let you log in.
Appreciate any assistance. Thanks

Hi Tim - Thanks for sharing the guide; it was very helpful.
I still have one question;
suppose we take the backup of schemas from production database server connecting to production BO server, say BOPRODmachine.domain.com
and then we restore all schemas in disaster recovery server database and file store on disaster recovery BO server, say BODRmachine.domain.com
How will the restored CMS data recognized this new disaster recovery BO server?
We tried to do that and BODRmachine shows that all servers are running on BOPRODmachine in CMC -> Servers
When we tried to connect via Infoview, it didn't let us as server name was different.
Do we have to rebuild the database for CMS on disaster revocery environment before starting the CMS server?
Please advise. Thanks

ACTIVE/ACTIVE Disaster Recovery configuration

If I have two separate 10.2.0 RAC databases in two separate geographical locations and each database is receiving updates and sending the changes to the other database via Streams, how would you configure a disaster recovery solution for this?
In this scenario, each database is intended to be a copy of the other. It is an ACTIVE/ACTIVE type of setup.
Do you need also have a data guard database for each of these databases to support disaster recovery?
Thanks for your feedback.

Hello Sergio,
To get to Ironport Dcoumentation, please do the following:
1) go to www.cisco.com
2) Login with CCO id and password
3) Select support
4) On resulting page, under Prduct Name, select Security
5) You should see "Email Security" and "Web Security" option there, which will bring you to the Documents.
For WSA the doc guides are here http://www.cisco.com/en/US/customer/products/ps10164/products_user_guide_list.html
For The ESA the doc guides are here http://www.cisco.com/en/US/customer/products/ps10154/products_user_guide_list.html
Regards,
Eric

Difference between disaster recovery and cloning db

hi,
i have configured cloning of database through rman backup and write now i 'm going to configure disaster recovery database .
please tell me the difference between both .
thanks.

can you provide me any link upon disaster recovery so i could learn much about ithttp://www.oracle.com/us/products/ondemand/collateral/disaster-recovery-exec-brief-069248.pdf
http://www.oracle.com/technetwork/database/features/availability/dataguardoverview-083155.html

How to replicate schema to other database

Hi,
I have a database of version 11.2.0.3 and running on version Enterprise Version 5.
On this database, I have a application which resides on a schema called -> APPS (Size of it being 8G)
I need to setup the same schema in a DR site and replicate the whole data continuously so that if there is an issue in primary site, I can switch to the DR site.
I cannot setup a Dataguard (physical standby) configuration in this database as there is another application which resides on this database and that application basically does the replication by itself to the DR site (The application is Oracle Content Management)
I am thinking of 3 options. Appreciate if you could please suggest me the best option and also pointers on how to implement them.
1. Set up Materialized View in both Primary and DR database schema so that the schema gets refreshed continuously
2. Implement streams and replicate the data across the schema's (Both from Primary db to DR and viceversa)
3. Move this application (schema) to a new database with Physical Standby Dataguard configuration.
Since the schema is of a very small size (8G), i want to try options 1 and 2 before trying option 3. i.e. creating new db altogether.
Thanks!

877343 wrote:
I need to setup the same schema in a DR site and replicate the whole data continuously so that if there is an issue in primary site, I can switch to the DR site.- If you need Disaster Recovery Solution ->
3. Move this application (schema) to a new database with Physical Standby Dataguard configuration. Oracle Data Guard provides the management, monitoring, and automation software
infrastructure to create and maintain one or more standby databases to protect Oracle data from
failures, disasters, errors, and data corruptions. Data Guard is unique among Oracle replication
solutions in supporting both synchronous (zero data loss) and asynchronous (near-zero data loss)
configurations. Administrators can chose either manual or automatic failover of production to a
standby system if the primary system fails in order to maintain high availability for mission
critical applications.
- If you have good knowledges in "Materialized View"(More Developer Role than DBA).
1. Set up Materialized View in both Primary and DR database schema so that the schema gets refreshed continuously- Streams -> complicated for beginners.
2. Implement streams and replicate the data across the schema's (Both from Primary db to DR and viceversa)+
Try Oracle Golden Gate!!!

Best Way to setup a disaster Recovery site for a logical standby database

I have a logical standby DB (L1DB) as a reporting db on the same machine as the primary (P1DB). We are planning on building a disaster recovery site with similar hardware and potentially have disk mirroring of atleast the redo log files.
The DR site can hold an additional physical standby (S1DB) for the primary (P1DB). I am trying to understand what would be the best way to setup the Disaster Recovery site for the L1DB logical stdby. Ideally, when the disaster happens, and I no longer have P1DB and L1DB, I should be able to switch to S1DB as the new primary. But how do I setup to have a L2DB that takes the place of L1DB and has its contents and can be setup as a logical standby of S1DB?

If you already setup one logical standby, then you know how it works, so not sure what question you are asking ?
Personally I would setup L2DB as a standby of the original primary P1DB. Having downstream standby databases complicates things, and adds additional lag between primary transaction time and L2DB apply.

How to migrate Planning from Production to Disaster-Recovery server?

We are using Planning 11.1.1.3 Oracle repository. Presently our DR Planning Application name is different than production's name, and the DR's Windows server names are different from Production's. Otherwise, all other configuration the same.
How do we migrate Planning from Production to Disaster-Recovery server? We stopped Planning on DR server. Then we exported production planning Oracle repository and imported it to DR Planning. We restarted DR's Planning. DR planning seems to be running fine, but I am afraid to click "Refresh Planning" on DR Planning - it might update Production server. So how can I be sure DR and Production planning are disconnected ?
Is there anything we need to do? This method seems to be faster than migrating with LCM.
Edited by: Essbase Fan on Oct 18, 2010 10:11 AM

You are definitely go about it the correct way, if you are migrating the whole planning application I have to agree it is a safer and quicker route.
The connection information to essbase is stored in the planning system database/schema so as long as you have not migrated that then you should be good to refresh.
To put your mind at rest, log into the planning application and edit the datasource associated with the application then you will see where the essbase server is it is going to refresh.
Cheers
John
http://john-goodwin.blogspot.com/

How to implement Disaster Recovery in TimesTen?

hello, chris:
we have a requirement to implement disaster recovery from remote when the master and standby nodes are failover in local. how to implement it in timesten? Can master standby pairs with subscribers mode caryy out it? when the master and standby nodes are fail, can subscriber node take over the application?? thank you.

The best, and recommended, solution for this is to have an active/standby pair located locally as the primary mechanism for high-availability and to configure a remote readonly subscriber datastore. In the event that the primary site completely fails, the remote subscriber can be easily (few seconds) promoted to an active to form the basis of a new active/standby pair at the remote site.
It is not supported to split an active/standby pair across a network connection that is anything less than LAN grade but a remote subscriber can be located across any reasonable network connection (WAN, VPN etc.) as long as there is sufficient bandwidth and the latency is not too high.
Chris

How to configure high availability and disaster recovery? And user authenticate

We are in the process of rolling out our online help which was created using Robohelp. In our initial rollout we will provide access to the files via our Client Portal which requires authentication. We are also planning for our next version where we intend to implement Robohelp server functionality.
Our IT team is looking at options on how to configure for High Availability and Disaster Recovery. It seems that Robohelp doesn't have any built-in functionality in this area. In addition we require that our users authenticate. The options for the server version seem to be more internally focused and we would need to solution the authentication using a third party.
Would anyone be willing to share their approach in these areas? Would you be willing to participate in a conference call with our IT Professionals?

Hello again
I see my good friend Peter replied to your LInkedIn post where you cross-posted the same question. For those here that have no clue what Peter stated, here it is:
What are you seeking to recover? Your projects? Your outputs? This sounds like a question more appropriate to Disaster Recovery consultants and far wider reaching than RoboHelp. To me it seems like a question your IT people should be asking direct to such consultants who would expect a fee for their advice.
I would agree with Peter's reply.
I'll also go further and ask what exactly is being done in this realm for the application? Help files generally are there to support an application on the server. So whatever you are doing for the applciation should also be able to be used for the WebHelp, FlashHelp or web based AIR Help files, no?
Cheers... Rick
Helpful and Handy Links
RoboHelp Wish Form/Bug Reporting Form
Begin learning RoboHelp HTML 7, 8 or 9 within the day!
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How the transactional replication work for simple recovery database (looking for some internal concept)

How the transactional replication work for simple recovery database (looking for some internal concept)
Rahul

There seems to be a new myth going around recently. I’ve had at least three people tell me, in the last month, that SQL’s transactional replication requires the database to be in full recovery.
This is complete fabrication. Replication (SQL native replication, that is) can work with the databases in any of the recovery models.
Transactional replication does involve the transaction log, as that’s where it picks up changes from. The log reader scans over the transaction log looking for log records marked for replication, copies those to the distribution database and then marks them
as replicated. When the checkpoint (for simple recovery) or log backup (for full or bulk logged) occur, the log will only be truncated up to the oldest inactive, replicated transaction.
Because transactional replication has its own way of ensuring log records aren’t discarded before been picked up by the log reader, there’s no requirement for a specific recovery model.
Refer this link
http://sqlinthewild.co.za/index.php/2008/12/05/a-new-sql-myth/
--Prashanth

How to install and configure Exchange Server 2010 DR (disaster recovery) on Windows server 2012.

We need to install and configure Exchange Server 2010 with DR(disaster recovery on Server 2012.
Pls suggest step by step.
Pankaj Kumar

Hi,
Here is an article which may help you for your reference.
Deploying High Availability and Site Resilience
https://technet.microsoft.com/en-us/library/dd638129(v=exchg.141).aspx
Besides, there is a related thread here.
https://social.technet.microsoft.com/Forums/exchange/en-US/577c9433-a20b-442e-8ce7-be59aea35855/preparation-for-deploying-exchange-2010-servers-at-remote-site-dr-site?forum=exchangesvrdeploylegacy
Hope this is helpful to you.
Best regards,
Belinda Ma
TechNet Community Support

How to recovery database

Please help me in this:
- database is oracle 9.2, arc log is off;
- i have full copy of database 7.05.2009;
- i have full dump of database 10.05.2009;
- database is crash 10.05.2009;
- i recovery database from full copy 7.05.2009;
- What parametres of imp I should apply to restore base as of 10.05.2009 from full dump?
full=y, ignore=y???

To restore a database with imp/exp, you need first that he database is up and running.
Try to restart instance with STARTUP command. If this does not work, you need to either restore database
as described in my previous message or to recreate it (with DBCA or with the scripts that have been used at creation time).
Then you can restore the database using the export full with imp command and the following options full=Y and ignore=Y (you will likely get some errors for SYSTEM objects that already exist and possibly with already existing tablespaces).
Please post you Oracle version 4 digits and command used with Oracle output including error messages.
Edited by: P. Forstmann on May 11, 2009 11:06 AM
Edited by: P. Forstmann on May 11, 2009 11:07 AM

How to replicate CDC on Disaster Recovery Database.

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