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This is a step by step article for upgrading Oracle Grid Infrastructure Software from 11gR2 (11.2.0.4) to 12c (12.1.0) Current Environment details: Node1 => oelracn1 [GI version - 11.2.0.4]  Node2 => oelracn2 [GI version - 11.2.0.4] > These nodes are running on Oracle Enterprise Linux 6.1 - 64 Bit > Database running on these hosts is on version 11.2.0.4 (OELPROD - OELPROD1, OELPROD2) High Level Steps  for upgrading Grid Infrastructure from 11gR2 to 12cR1: 1) Verify all services are up and running from 11gR2 GI Home 2) Perform backup of OCR, voting disk and Database 3) Create new directory structure on both RAC nodes for 12c SW INstallation 4) Run "runcluvfy.sh" to verify errors  5) Install and upgrade GI from 11gR2 to 12cR1 6) Verify upgrade 1) Verify all services are running up and running from 11gR2 GI Home - Verify version of CRS Home: [root@oelracn1 bin]# ./crsctl query crs activeversion Oracle Clusterware active version on t...

This a step by step article for configuring oracle 12c RAC on Oracle Enterprise Linux 6.1. Following software's used for this deployment: 1) Oracle Virtual Box 2) Oracle Enterprise Linux 6.1 (64-Bit) 3) Oracle 12c Grid Infrastructure (64-Bit) 4) Oracle 12c Database Virtual machines configuration: I used windows DNS Server 2008 for resolving scan IP to simulate it with real world deployments. You can use a single entry of scan in /etc/hosts file for TEST deployments. The high level steps for deployment: (assuming virtual box - already Installed) 1) Create Virtual machines 2) Install Oracle Enterprise Linux 6.1 3) Configure additional Hardware required for RAC (SHARED STORAGE) 4) Clone virtual machine 5) Perform all OS pre-requisites 6) Install Oracle 12c Grid Infrastructure 7) Install Oracle 12c RDBMS  home 8) Create RAC database 1) Create Virtual Mahcine: Follow step by step screens for creation of virtual machines: ...