Data Guard Broker to unplug, migrate a single PDB into a new container - Using DGMGRL migrate

Migration of a single PDB or executing of a single PDB into another container database with minimal downtime. This method has zero impact to any remaining primary PDBs.  To use this method  the process takes advantage of a new functionality added to the Data Guard broker command line interface DGMGRL.

Important: The process are steps involve changes being made to 2 independent CDBs and is supported in Oracle RDBMS versions older than 12.1.0.2

The migration process overview

RAC Configuration Audit Tool - RACcheck

RACcheck

RACcheck is a RAC Configuration Audit tool designed to audit various important configuration settings within a Real Application Clusters (RAC), Oracle Clusterware (CRS), Automatic Storage Management (ASM) and Grid Infrastructure environment.

Central TNSNAMES.ORA inside RAC using TNS_ADMIN [PRKP-1001 and CRS-0215 errors]

Is it possible to use a central tnsnames.ora on a shared file systems insite a Real Application Server. The answer to the question is YES. If the centralized tnsnames.ora is not correctly setup, it will produce the following errors [PRKP-1001 and CRS-0215 errors] at startup of the database or instance with SRVCTL. When using SQLPLUS to startup the database instance everything works as designed. Why SRVCTL is not working correctly is that, the TNS_ADMIN is not register into the Oracle Cluster Registry for the current database and instances.

The following steps in this blog will explain to you how you can solved the [PRKP-1001 and CRS-0215 errors] at startup of a database or instances by using SRVCTL statement with a centralized tnsnames.ora.