Alert: Vulnerability exposure for RAC on ASM

There is a serious vulnerability for Oracle RAC databases noted in the Oracle 11g release 2 RAC documentation.  This note indicates a possible scenario where itís possible for an entire RAC cluster to fail.  This exposure is only for RAC databases that are using Automatic Storage Management (ASM).

When using RAC, Oracle has announced that the key clusterware files, the OCR and Votedisks, can now be stored in Oracle Automated Storage Management (ASM). 

However, research by our expert DBA's indicate that it may well be premature to use this feature.

According to Oracle's documentation, the 11gR2 Clusterware Administration and Deployment Guide (chapter 2) , if a single node is lost, then the entire cluster may go down, if that node happens to be the master node.

See here for more on the exposure risks for RAC on ASM:

http://www.dba-oracle.com/t_vulnerability_exposure_RAC_on_ASM.htm

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How do I do that in Oracle?

Explore this series for a collection of tips that explain in detail how to perform specific tasks in Oracle related to database administration. Consisting of expert advice from top Oracle gurus, these how-tos provide step-by-step instructions to guide you through database administration processes related to installation and upgrades, backup and recovery and other Oracle basics.

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