Upcoming Webinar - Migrate single instance database to RAC

Interested knowing about all existing methods to migrate your existing single instance database to RAC? Attend my upcoming webinar 'Migrate single instance database to RAC - 360 degrees' on 29/3/2012.
The webinar is sponsored and hosted by RedGate .

Register here


On Oracle Database administrators have to deal with numerous challenges whilst migrating an existing non-cluster environment to a cluster environment. Beyond any doubts, one of the most significant challenges a DBA faces is migrating an existing single instance database to RAC.
Although Oracle provides several easy methods to carry out the procedure,  it is important to every DBA to identify which method best fits to his/her needs and requirements.
The core objective of this presentation is to give you an overview about different methods for migrating an existing single instance database to RAC, and help you discover the most suitable one for your need. The session will also explain how to perform the migration procedure to minimize the downtime in order to improve (speed up) the duration whilst dealing with VLDB.
A live Q+A with Syed Jaffar Hussain will follow the presentation.
Syed Jaffar Hussain
Oracle ACE Director, Oracle Magazine Editor's choice award (2011) for 'Technologist of the year, DBA' Database Support Team Lead in Inma Bank, Oracle Certified Master (10g),Oracle RAC Certified Expert and OCP v8i, v9i, v10g and v11g. 17 years of Information Technology experience, including 9 years as an Oracle DBA. Expert on All Things Oracle.


Oracle 11gR2 addNode.sh fail with SEVERE:Cannot perform add node proceduure

Since December 2011, we have been struggling with an issue whilst adding two new nodes to our existing Oracle 11gR2 cluster that is running over HPUX platform. Just for the records, this environment had been recently upgraded from 10gR2 to 11gR2 and successfully applied the PSU ( in the recent past to over come from a significant number of Oracle bugs that we confronted.

We simple followed a very straight forward addNode.sh procedure to add two new nodes which unfortunately failed with the following error:

SEVERE:Cannot perform add node procedure as the value of CLUSTER_NEW_VIRTUAL_HOSTNAMES or CLUSTER_NEW_NODES or both could not be obtained from the command line or response file(s). Silent install cannot continue.

We gave up eventually after having several unsuccessfully attempts to fix the issue and finally opened a TAR with Oracle support to seek their assistance over the issue. Unfortunately, all workarounds suggested by the Oracle Support team doesn't yield any fruitful results, therefore, they have requested their development team to register a new bug for the issue. A new BUG 13555953 has been registered for the problem and still the development team is working over the issue. The problem with the development team is that they are unable to reproduce or simulate the bug at their premises.

However, last week we thought of giving a try adding a node at a time, rather than going with two nodes together. Bingo, the approach worked big time and we were able to add the node with small scale of hiccups.
The problem we got was resolved by applying the solution mentioned in the MOS [ID 1085893.1].

Though we have managed to add two nodes individually, the problem whilst attempting to add two nodes together is still persists. The Oracle development team is still working over the issue and they are yet give us the the root cause and a fix for the issue. We are having a migration project in the pipe line where we would be migrating our existing servers from HPUX SD1 to SD2. If the only workaround is to add a node at a given time, then, it gonna consume a significant time for us to complete the migration project.

I am very optimistic about getting a fix for the bug from Oracle and I shall keep posted the development on my blog.

Happy reading,