Return of the Acfs , October 2012 PSU Patch (14275572) for GI and RDBMS

Introduction,

This week i have patched a preproduction environment with latest PSU patch at this moment ( October 2012). Next week will do the same on the production machines In it self this action is not a big  issue when applying it to the Grid infra structure and RDBMS, but  ACFS is in use on those boxes. Since I hope this will make an interesting note, I have gathered my steps and want to share them with you.

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First encounters of the ACFS kind

Introduction:

This weeks challenge has become to set up ACFS on two new to be implemented Real Application Clusters. As with any tooling first question will be , what is your goal if you want to start using it. My purpose is to start using ACFS as a shared mountpoint between the servers, nodes in the cluster in order to have each instance do its logging (ADR), audit and listener log  on that mount.

This blog will tell you about my setting it up,  the  issues i came across and the way it is implemented in a working way.

To share the plot of the story:  After implementing I  had the issue that  right after cluster reboot all services where launched automatiocally BUT  the instances would NOT start automatically. In the end i ended up with ACFS being defined as  a shared home for an Oracle RDBMS installation. And it worked/works after cluster reboot  cause all resources are happy and online now.

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Configuring Active- Passive Clustering Oracle Databases in Grid Infrastructure.

Introduction:

For a billing environment I have been asked to change the current Real application solution to a HA solution with an Active – Passive Database in the Cluster ware of Oracle (Grid Infrastructure) (11.2.0.2.0). Even though I have had / seen examples of this working in 11gr1 the fact we use 11Gr2 allowed us to  skip steps needed in the 11gr1 environment  (such as a dedicated virtual Ip address, able to  fail over and a listener that has to come along with that as well). This solution is based on the fact that in this project we have set up scan listener(s) and also that we connect via a Service (taf). Also it should be said that the parameters for the cluster ware have changed again between Oracle 11gr1 and 11gr2. So it was a nice challenge to see, adapt and solve the issues

It is my estimate that a maintenance window of app 1 Hour  per Database will be needed, doing the analyses,  the changes,  the removal and adding it back to the cluster and  do relocate tests.

Ps  i have marked specific  cluster commands in yellow.

Happy Reading.

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Migration to 11gr2 Cluster ware (Moving from 11.1.7 Crs to 11.2.0.3.0 Grid Infra structure)

Introduction:

Always a challenge patching a Real application cluster. My assignment,  goal in this is to bring Oracle Clusterware ( 11.1.0.7.0)  (without any PSU patches installed) to 11.2.0.3.0.  Grid Infrastructure. This will be performed in two steps , in two maintenance windows in order to minimize the change of breaching SLA of maintenance windows.

Happy reading ,

Mathijs

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Upgraders Nightmare Gridinfrastructure (1120.3.0) Install locked out all Connections

Introduction

This week I have had the challenge to finally install the Grid infrastructure Software 11.2.0.3.0 on a 4 Node production Real application cluster on Linux. I had followed all the guidelines and came well prepared because more than a month ago I had done the same on the preproduction cluster.

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A project leaders challenge: Linux Upgrade and Consequences for Grid Infrastructure

Introduction

After building the complete  Infra structure for Oracle (Grid Infra with Asm) and Rdbms in 11.2.0.2.0. version this Database Administrator is now facing a new challenge made by his Project leader. Please investigate the consequences of a  Operating  Upgrade from Red Hat Linux 5 ( 5.6) to (5.7) and change your Oracle environment to adapt to the changed Operating system. As they say often say  in the Netherlands the Customer is King  so this Admin was on his way. And of course set up a plan in which this will be done one step at the time , starting with a Test box. Because even with Kings the Dba should consider a Quote  of one of the Oracle gurus (Arup Nanda :   What’s more important guts or caution?” I would say pragmatism, bordering on caution; not guts.  And i do believe the Guru is right in this matter.

Happy reading,

Mathijs

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Implement a Logical Standby Database

For a customer  I had the privilege  to investigate and implement a Logical standby Database. Primary side was a 6 Node RAC and the Standby side was scheduled to become a  two Node RAC. The standby side was not meant as a Fail over solution but had to serve the purpose of an almost on-line Reporting environment to the customers ( in such a way also separating them from the production database). The requirements  became quite a challenge in more than one aspect  giving the facts that the project wanted to go live with it in the very next 2 weeks,  that this was unknown territory for the complete team hmm and given the fact that the decision to change from a physical standby database to a logical one  was one of the very last minute.  I forgot who said it, but with respect I would like to quote   the unknown creator of this following thought: .. but if things would always be easy you and I would be out of a job..

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