EBS Application synchronization

[soumya]

Hi Erman,

Hope you are doing well.

Env :-
EBS R12.1.3
DB:11.2.0.4
OS-Linux7

We are implementing a DR for our production site , so for that we have configured data guard between primary and standby site and its working properly.
For application we have setup rsync to synchronize application files between primary and standby site.

Now my question is what are the files that should be synchronized between two sites ?
We are so far synchronizing conc out and log files and custom tops.
 
Also I would like to know  what are the best practices for synchronization of apps tier with primary and standby application site.

Would love to hear your insight about this.

Many thanks for your help towards the community.


Regards,

Soumya

[ErmanArslansOracleBlog]

Thanks Soumya

I m doing okay. I hope everything is going well for you as well.

Actually, synching custom top in addition to conc log and out files is quite good. Rsync is a good method and generally it performs well.
You may also have custom daemons to do the same job in a event driven way.
Similarly, you may use storage technologies and filesystem technologies to synchronize those filesystems automatically when the files in the primary site are changed.
You should also analyze your environment and find any other directories which should also be synchronized.. ( this depends on your env)
If there are some routines or codes which extract data to filesystem and if they store that data in some files there, then the related directories should also be syncronized between primary and standby site.. (this is both for Apps tier and DB tier)

You also need to have the required procedure in place to synch the filesystems after patching activities.
These activities are all documented in Business Contunity documents in Oracle Support.

Lastly, you should do failover and switchover test in regular intervals.. You should have a procedure to follow in these tests and you should improve the quality of that procedure, if you discover any issues during those tests.

Also keep the paths of your primary and standby filesystems similar.. This way, you don't need to do any compilation and relink-like activites during a failover or switchoper operation..

You may also use a site load balancer and you may arrange your hostnames and dns entries according to you needs. (these will also increase the speed of your failover operations, these will make the failover - switchover easier.)

Analyze  your environment for external dependencies.. I mean, for instance you should be able to consume the webservices hosted by application servers outside EBS, when you failover to the standby site.. Your clients should be able to reach EBS services.. So network and firewall configuration should be in place.. I think you know what I mean..

[soumya]

Thanks a lot Erman for a detailed insights. This will help me a lot.

Regards,
Soumya