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Can different releases of Oracle RAC be installed and run on the same physical Linux cluster?

April 26, 2017cluster different installed linux Oracle physical RAC releases run

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Can different releases of Oracle RAC be installed and run on the same physical Linux cluster?

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Yes – However Oracle Clusterware (CRS) will not support a Oracle 9i RAC database so you will have to leave the current configuration in place. You can install Oracle Clusterware and Oracle RAC 10g or 11g into the same cluster. On Windows and Linux, you must run the 9i Cluster Manager for the 9i Database and the Oracle Clusterware for the 10g Database. When you install Oracle Clusterware, your 9i srvconfig file will be converted to the OCR. Oracle 9i RAC, Oracle RAC 10g, and Oracle RAC 11g will use the OCR. Do not restart the 9i gsd after you have installed Oracle Clusterware. Remember to check certify for details of what vendor clusterware can be run with Oracle Clusterware. Oracle Clusterware must be the highest level (down to the patchset). IE Oracle Clusterware 11g Release 2 will support Oracle RAC 10g and Oracle RAC 11g databases. Oracle Clusterware 10g can only support Oracle RAC 10g databases.