Apps DBA Workshop

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 the c

This is a step by step article for adding a new node to an existing 2  node 12c Grid Infrastructure cluster. I've demonstrated this post on virtual box. This post will be helpful for those who wants to practice adding of nodes for TESTING/DEMONSTRATION purpose and it will be also helpful for those who wants to add a node in a real production environment. Please read my previous article  to have a clear understanding of this deployment. " Oracle 12c RAC Installation on linux using virtualbox " High level steps for adding a node to 12c Grid Infrastructure: 1) Install OS same as other surviving cluster nodes 2) Configure shared Storage 3) Configure network (public, private and virtual) 4) Configure all OS pre-requisites (users, groups, directories, kernel parameters etc) 5) Run cluvfy to verify addition of node 6) Add node to an existing 12c cluster 7) Verify Services on all cluster nodes 8) Add Instance to a third node Existing network configuration of 2 No